I have used my PriorityPass in conjunction with Southwest flights - here's a quick summary of where it "makes sense" - some I have actually used, others I have mapped out based on the terminal maps for a particular airports, while others are from other Flyertalkers' experiences:

Updated as of 31 Aug 2025 - added feedback from home92345 regarding BOS (The Lounge - Terminal C); moved Chase Sapphire Lounge from inconvenient for BOS to convenient since Sapphire Lounge is in B gates and Southwest flies out of the B gates
Updated as of 27 Aug 2025 - added feedback from Boraxo regarding SFO; updated entries for several airports; added some Capital One Lounges and Chase Sapphire Lounges to the list; deleted restaurants since most Priority Pass Select issued by banks have removed the benefit; deleted IAH since Southwest exited the market
Updated as of 20 Jan 2024 - added feedback from lya for updates at San Francisco airport
Updated as of 9 June 2023 - added feedback from Reaching regarding SFO Priority Pass lounge accessibility; added China Airlines Lounge @ SFO; added Mercantile Dining and Provision @ DEN; added Samuel Adams Brewhouse @ ATL
Updated as of 1 Dec 2022 - added feedback from m907 for BNA restaurant, from Rd3 BWI restaurant; added Gameway at HOU; deleted lounges at LAX

NOTE: Effective August 1, 2019: Priority Pass memberships subsidized by American Express (Platinum, Centurion, Hilton Ascend, Hilton Aspire, Marriott Bonvoy Brilliant) will no longer include complimentary access to non-lounge airport experiences (i.e. restaurant credit, spas, gaming).
Effective January 1, 2023: Priority Pass memberships subsidized by Capital One will no longer include complimentary access to non-lounge airport experiences (i.e. restaurant credit, spas, gaming).

- Atlanta (ATL) - Priority Pass & Priority Pass Select - Chiroport - Concourse A - good for 20 min hands-on stretch & massage session - Chiroport kiosk located near main rotunda of Concourse A, next to the BlueWire kiosk and Delta Help Desk.
Priority Pass & Priority Pass Select - Xpress Spa - Concourse A - opposite Center Food Court, near gate A18.
Priority Pass & Priority Pass Select - Xpress Spa - Concourse C - across from gate C37.
Priority Pass & Priority Pass Select - Xpress Spa - Concourse D - across from gate D25.
Priority Pass & Priority Pass Select - The Club@ATL - International Terminal - Concourse F - mezzanine level, next to chapel - should be accessible to Southwest passengers using Terminal Train. 6 AM - 10:30 PM
Priority Pass & Priority Pass Select - Minute Suites- Concourse B - mezzanine level, near Gate B16 - should be accessible to Southwest passengers using Terminal Train Open 24 hours LegalTender noted that Priority Pass is good for a 60 min visit.
Priority Pass & Priority Pass Select - Minute Suites- Concourse B - mezzanine level, near Gate B24 - should be accessible to Southwest passengers using Terminal Train Open 24 hours LegalTender noted that Priority Pass is good for a 60 min visit.
Priority Pass & Priority Pass Select - Minute Suites- Concourse E - located in the atrium at the top of the escalators to the left
- Baltimore (BWI) -Priority Pass & Priority Pass Select - Minute Suites - Concourse C - Located at C gates, between gates C3 and C5. Should be convenient/accessible when flying Southwest
- Boston (BOS) - Priority Pass & Priority Pass Select - The Lounge - Terminal C - Southwest flies out of Terminal A, lounge is airside in Terminal C across from C19. Per home92345, visited The Lounge near gate C19 on a Sunday afternoon two weeks ago, fairly full, but no wait. It was a 10+ minute walk airside to the Southwest gates in B.
- Priority Pass & Priority Pass Select - Chase Sapphire Lounge - Terminal B, close to gate B40, use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year.
- Charlotte (CLT) - American Express Platinum - Centurion Lounge - Lounge is located at intersection of Concourses D and E on the mezzanine level. As all concourses are connected airside, should be accessible to Southwest passengers. Per HPN-HRL, Charlotte Centurion Lounge is located at the "D" end of the connection between concourses D and E, which is a bit of a walk from concourse A (where the Southwest gates are located).
Priority Pass & Priority Pass Select - Minute Suites- lounges located in the main atrium, near the D/E connector next to the Food Court Area. All gates are connected airside, so should be accessible to Southwest passengers. Open 24 hours LegalTender noted that Priority Pass is good for a 60 min visit.
- Chicago Midway (MDW) -Priority Pass & Priority Pass Select - The Club MDW - after clearing the Security Checkpoint, club is located straight ahead on the right opposite the Food Court, before the entrance to Concourse B. Accessible from all concourses.
- Chicago O'Hare (ORD) -Priority Pass & Priority Pass Select - Swissport Lounge - Terminal 5- between gates M7 and M8. Should be accessible since Southwest flies out of Terminal 5 at O'Hare?
- Cincinnati (CVG) -Priority Pass & Priority Pass Select - The Club@CVG - Concourse A - located between gates A8 and A10. 6 AM - 10 PM
- Cleveland (CLE) - Priority Pass & Priority Pass Select - The Club CLE - Concourse B. after Security checks, near Ohio Gameday Sports
- Denver (DEN) - American Express Platinum - Centurion Lounge - Concourse C. Located just past gate C46 on the mezzanine level. Accessible to all gates in concourses A, B and C. Very convenient to Southwest gates, as Southwest flies out of Concourse C.
- Capital One Venture X - Capital One Lounge - accessible to Southwest passengers, have to take the train to the A Concourse for Lounge and then to the B gates for Southwest. One does NOT have to reclear security.
- Detroit (DTW) - Priority Pass & Priority Pass Select - Lufthansa Business Lounge - located next to Gate D8, per BearBear, accessible and near Southwest gates, not open to Priority Pass between 13:00 and 16:00.
- Hartford (BDL) - American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge - Per jco613, located on the low gates A pier. ucdtim17 noted the new partnership with American Express and Escape Lounges.
- Honolulu (HNL) - Priority Pass & Priority Pass Select - Overseas Terminal (Terminal 2) - IASS Hawaii Lounge, should be accessible for Southwest passengers as Southwest flies from this terminal.
- Houston Hobby (HOU) - Priority Pass & Priority Pass Select - Gameway - located near gate 1, convenient for Southwest passengers. Cardholders receive 1 hour of gameplay and 1 snack/1 drink (not valid for Monster Energy drink). Note: Priority Pass Select issued via Amex not valid.
Priority Pass & Priority Pass Select - Chiroport - located near Common Bond restaurant and gate 1, convenient for Southwest passengers
Priority Pass & Priority Pass Select - Xpress Spa - located near gate 45, convenient for Southwest passengers.
- Kahului (Maui) (OGG) - Priority Pass & Priority Pass Select - Premier Club - located on 2nd floor opposite Gate 17, should be accessible to Southwest passengers.
Priority Pass & Priority Pass Select - Hawaiian Airlines South Premier Club- located on 2nd floor opposite Gate 15, should be accessible to Southwest passengers.
- Las Vegas (LAS) - Priority Pass & Priority Pass Select - The Club@LAS - Terminal 1 - Concourse D, 2nd level above red line train station (per HPN-HRL and justhere, accessible to Southwest passengers but not the most convenient for access before Southwest flights, make sure to factor in time to get to gate prior to departure) 5:30 AM - 12:30 AM daily
Per Zorak: All of LAS is connected airside, though not necessarily conveniently. From A/B you can walk to the C/D tram area. From C, take the tram as if you are exiting but DO NOT exit security. The doors between the C and D trams will be open (it's the only way for priority/PreCheck pax to access the D trams). Go through those doors and take the tram to D terminal, go up the long escalators then double back to the left (the club looks back over the escalators, sort of). To return, retrace your steps (making sure to get on the Blue Line tram back to T1 and not the red Line which will put you into T3). Be aware however that The Club at LAS is a tiny shoebox.
- Priority Pass & Priority Pass Select - The Club@LAS - Terminal 3 - Located across from gate E2. Per Zorak: From A/B you can walk to the C/D tram area. From C, take the Blue Line tram as if you are exiting but DO NOT exit security. The doors between the C and D trams will be open (it's the only way for priority/PreCheck pax to access the D trams). Go through those doors and take the red Line tram to E terminal. 5:30 AM - midnight daily
- American Express Platinum - Centurion Lounge - per NoStressHere, accessible to Southwest passengers - have to take the train to the D Terminal and then back to the security area and then into the Southwest gates. One does NOT have to reclear security. Always decent food at the Centurion club and free drinks.
- Capital One Venture X - Capital One Lounge - accessible to Southwest passengers, have to take the train to the D Terminal and then back to the security area and then into the Southwest gates. One does NOT have to reclear security.
- Los Angeles (LAX) - Priority Pass & Priority Pass Select - Be Relax Spa - Terminal 1, convenient for most Southwest flights, as most Southwest flights depart from Terminal 1 at LAX. Options include 30 min lounger massage as well as head massage/foot massage options.
American Express Platinum - Centurion Lounge, likely not useful for most Southwest flights, as most Southwest flights depart from Terminal 1 at LAX, while lounge is in TBIT. However, some international flights will depart from TBIT, so accessibly behind security to Terminal 6 (not particularly convenient, but an option). After clearing TSA in TBIT, walk towards the bridge to the Great Hall. Once there, immediately turn left and enter the elevator lobby. Take elevator from level four to level two where the lounge is straight ahead. (temporarily closed due to construction?)
- Priority Pass & Priority Pass Select - Gameway - Terminal 3, near gate 30B, accessible to Terminals 2 and 3, not convenient for Southwest passengers. Cardholders receive 1 hour of gameplay and 1 snack/1 drink. Note: Priority Pass Select issued via Amex not valid.
- Priority Pass & Priority Pass Select - Gameway - Terminal 6, near gate 65A, accessible to Terminals 7 and 8, not convenient for Southwest passengers. Cardholders receive 1 hour of gameplay and 1 snack/1 drink. Note: Priority Pass Select issued via Amex not valid.
- Miami (MIA) - Priority Pass & Priority Pass Select - Concourse E - Turkish Airlines Lounge - located past TSA checkpoint in Concourse E, not as convenient for Southwest passengers as Southwest flies out of Concourse G, so would require clearing security twice? Per synergistic, can attest to a Turkish Airlines lounge being accessible, but situation may have changed if the lounge changed locations or Southwest changed their gates.
- Priority Pass & Priority Pass Select - Concourse H - Turkish Airlines Lounge - located between Concourses H and J, not as convenient for Southwest passengers as Southwest flies out of Concourse G, so would require clearing security twice? Per synergistic, can attest to a Turkish Airlines lounge being accessible, but situation may have changed if the lounge changed locations or Southwest changed their gates.
- Priority Pass & Priority Pass Select - Concourse F - Club America F - located past TSA checkpoint in Concourse F, not as convenient for Southwest passengers as Southwest flies out of Concourse G, so would require clearing security twice?
American Express Platinum- Centurion Lounge - Concourse D - located near gate D12. not really convenient for Southwest as Southwest flies out of Concourse G, so would require clearing security twice.
- Nashville (BNA)- Priority Pass & Priority Pass Select - Minute Suites - Concourse D - located near gate D3.
- New Orleans (MSY)- Priority Pass & Priority Pass Select - The Club @ MSY, per NoStressHere, small location and can be crowded
- New York LaGuardia (LGA) - American Express Platinum - Centurion Lounge - new location in Terminal B, convenient for Southwest flights
- Priority Pass & Priority Pass Select - Minute Suites Express, accessible for Southwest flights, after security, take escalator up one level and is located on right hand side of the Bowery Bay Shops
- Priority Pass & Priority Pass Select - Be Relax Spa, accessible for Southwest flights. Options include 30 min lounger massage as well as head massage/foot massage options.
- Priority Pass & Priority Pass Select - Chase Sapphire Lounge - use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year.
- Oakland (OAK) - American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge
Per shammers, this is a 5-15m walk (inside security) from the T-2 gates that handle the WN flights. ucdtim17 noted the new partnership with American Express and Escape Lounges.
- Ontario (ONT) - American Express Platinum - Escape Lounge - Terminal 4 - opened on May 13 2019 - should be convenient/accessible for Southwest passengers.
American Express Platinum - Escape Lounge - Terminal 2 - not convenient for Southwest passengers
- Orlando (MCO) - Priority Pass & Priority Pass Select - The Club MCO - Terminal B Concourse 4 - accessible from gates 70-99, next to InMotion Store, near gate 91 - per shammers, inconvenient for Southwest for departures, and better as an arrivals lounge where one isn't pressed to go through security - possible need to clear security again if there are international arrivals. elron938 and northsider had similar experience as shammers and had to clear security twice, so be mindful of the possibility of needing to clear security again, helps if you have TSA Precheck. Per nsx, The Club at MCO is accessible to Southwest passengers by riding the other train to gate 90. You can cut across on the air side of security between that train and the train that connects to Southwest's gates. nsx also mentioned that the Club at MCO is a very, very nice lounge and is the best US domestic terminal lounge he has ever visited. shammers and northsider agreed that the Club at MCO is a nice domestic lounge with decent food and alcohol.
- Philadelphia (PHL) - Priority Pass & Priority Pass Select - Minute Suites - located between Concourses A and B in the AB connector. Per HPN-HRL,PHL is totally connected behind security, but Southwest uses gates in terminal E, which is not close at all to any PP lounges or the Centurion Lounge - it's almost worth backtracking to terminal F and riding the F transfer bus to A/B.
American Express Platinum - Centurion Lounge - Lounge located in Terminal A West, near Gate A14. The Lounge can be reached from any other terminal by walking or via shuttle bus. Per HPN-HRL,PHL is totally connected behind security, but Southwest uses gates in terminal E, which is not close at all to any PP lounges or the Centurion Lounge - it's almost worth backtracking to terminal F and riding the F transfer bus to A/B.
Priority Pass & Priority Pass Select - Chase Sapphire Lounge - use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year.
- Phoenix (PHX) - American Express Platinum - Centurion Lounge The Centurion Lounge is located in Terminal 4 across from Gate B22 on the upper level. Per smmrfld, PHX Centurion is in Terminal 4, but it’s a good walk from WN gates. Note: you cannot access both Centurion and Escape lounges on the same day.
American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge The Escape Lounge is located in Terminal 4 across from Gate B22 on the upper level. Per smmrfld, Phoenix Escape is in Terminal 4, but it’s a good walk from WN gates. Note: you cannot access both Centurion and Escape lounges on the same day.
- Priority Pass & Priority Pass Select - Chase Sapphire Lounge - use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year.
- Pittsburgh (PIT) - Priority Pass & Priority Pass Select - The Club@PIT Concourse C. after security, across from gate C52 between Bar Symom and Kidsport. Southwest flies from Concourse A, but lounge is accessible to Southwest passengers.
- Portland (PDX) - Priority Pass & Priority Pass Select - Alaska Airlines Board Room - looks doable - lounge is in Concourse C, Southwest gates are out of Concourse C also.
- Providence (PVD) - American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge - Main Terminal - should be convenient/accessible for Southwest passengers.
- Reno (RNO) - American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge
Per worldwidedreamer, the lounge is accessible past security, take the escalator up, and turn left for 30 feet. Nice staff and, like other Escape lounges, lacks a bathroom
- Sacramento (SMF) - American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge - Terminal A, Southwest flies out of Terminal B so not convenient
- American Express Platinum & Priority Pass/Priority Pass Select - Escape Lounge - Terminal B, Southwest flies out of Terminal B so is convenient for Southwest passengers.
- San Diego (SAN) - Priority Pass & Priority Pass Select - Chase Sapphire Lounge - use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year. Boraxo noted that it is a 5-7 minute walk landside between T1 and T2, and you cannot walk airside between the terminals. So if you want to fly WN and use Chase you should enter security through T2, and then probably allow 10 minutes to walk back to T1 and additional time to clear security again. So not really worth it if you typically arrive 30min before boarding as Boraxo does.
- Priority Pass & Priority Pass Select - Aspire Lounge - Terminal 2, post security between Terminal 2 East security and the bridge to Terminal 2 West. Accessible to all Terminal 2 customers. Southwest flies from Terminal 1, so not convenient for Southwest passengers.
- San Francisco (SFO) - American Express Platinum - Centurion Lounge - International Terminal - Southwest used to fly from Terminal 1 but has relocated to SFO Terminal 2 D gates. Complimentary breakfast and lunch/dinner buffets and drinks. Free internet. Amex Centurion has temporarily relocated to the D gates as well, so is convenient.
Priority Pass & Priority Pass Select - Air France - KLM Lounge - International Terminal Concourse A, first left after TSA Checkpoint. Free internet. Southwest flies from Terminal 2 Concourse D. nsx mentioned this lounge is accessible to Southwest passengers and is convenient. Reaching noted that International Terminal Concourse A at SFO is now connected airside to Concourse B where Southwest Gates are. So AIr France KLM (temporary lounge) and China Airlines are now accessible to Southwest fliers without re-clearing security.
Priority Pass & Priority Pass Select - Golden Gate Lounge (formerly Air France - KLM temporary lounge) - International Terminal Concourse A per lya, Air France - KLM Lounge temporary lounge is now named the Golden Gate Lounge.
Priority Pass & Priority Pass Select - Virgin Atlantic Clubhouse - International TErminal Concourse A - per lya, available on level 5 post security in International Terminal Concourse A aside from the China Airlines Lounge and the Golden Gate Lounge.
Priority Pass & Priority Pass Select - China Airlines Lounge - International Terminal Concourse A, Near gate A1, level 4 post security. Proceed through Security Checkpoint A and turn left. Southwest flies from Terminal 2 Concourse D. nsx mentioned this lounge is accessible to Southwest passengers and is convenient. Reaching noted that International Terminal Concourse A at SFO is now connected airside to Concourse B where Southwest Gates are. So Air France KLM (temporary lounge) and China Airlines are now accessible to Southwest fliers without re-clearing security.
- San Jose (SJC) - Priority Pass & Priority Pass Select - The Club@SJC - Located across from Gate A15. Accessible to Southwest passengers, as gates are connected airside.
Priority Pass & Priority Pass Select - The Club@SJC - Located across from Gate A8. Accessible to Southwest passengers, as gates are connected airside.
- Priority Pass & Priority Pass Select - The Club@SJC - Located across from Gate A15. Accessible to Southwest passengers, as gates are connected airside.
- Seattle (SEA) - Pass & Priority Pass Select - The Club at SEA - Concourse A- near gate A11, and is a bit of a walk from the WN gates?
Priority Pass & Priority Pass Select - The Club at SEA - South Satellite- near gate S9, and is a bit of a walk from the WN gates?
- St Louis (STL) - Priority Pass & Priority Pass Select - Wingtips Lounge - Terminal 2. This is airside in Terminal 2, so convenient for Southwest passengers. Located on upper level, through security, turn left, opposite gate E29.
- Washington Reagan National (DCA) - Capital One Venture X - Capital One Landing - Terminal B - NOT Convenient as requires clearing security twice as Southwest flies out of Terminal A
- Washington Dulles (IAD) - Priority Pass & Priority Pass Select - Air France - KLM Lounge Concourse A - . Accessible for Southwest passengers with a short walk.
- Priority Pass & Priority Pass Select - The Etihad Lounge Concourse A - . Accessible for Southwest passengers with a short walk.
- Priority Pass & Priority Pass Select - Lufthansa Business Lounge- Concourse B - hours: TBD Concourse B, near Train. Convenient for Southwest passengers.
- Priority Pass & Priority Pass Select - Virgin Atlantic Clubhouse - Concourse A - Opposite Gate A32. Convenient for Southwest but further walk from Southwest gates than British Airways and Turkish Airlines lounges.
- Priority Pass & Priority Pass Select - Turkish Airlines - Concourse B - near gate B43. Convenient for Southwest passengers.
- Priority Pass & Priority Pass Select - Chase Sapphire Lounge - use Priority Pass associated with Chase Sapphire or Ritz Carlton or JP Morgan Reserve (multiple visits allowed per year) or other Priority Pass (Amex, Capital One, etc) but only 1 visit per calendar year.

International:
- Aruba (AUA) - Priority Pass & Priority Pass Select - International VIP Lounge - Gate 2 - Gate 2 - proceed through immigration and follow signs to Gate 2.
Priority Pass & Priority Pass Select - International VIP Lounge - Gate 8 - Gate 8 - proceed through immigration and follow signs to Gate 8.
- Cancun (CUN) - Priority Pass & Priority Pass Select - The Lounge in Partnership with Air Transat - Terminal 4 - after Security, proceed through Duty Free Shops and head to to Gate 54. Turn left and go down the lift or stairs and find the entrance to lounge. Southwest flies out of Terminal 4, so this lounge should be accessible.
- Los Cabos International (SJD) - Priority Pass & Priority Pass Select - VIP Lounge - after security, in front of Gate 8. Boraxo mentioned this is a nice lounge.
- Montego Bay (MBJ) - Priority Pass & Priority Pass Select - Club Mobay - after security, go up to the Mezzanine Level and take the elevator between Gates 8 and 13 up to lounge. Follow signs.
Priority Pass & Priority Pass Select - Club Mobay Arrivals Lounge - after customs, proceed straight ahead. Lounge located opposite Global Exchange Cambio and beside Thrifty Car Rental Desk.
- Nassau (NAS) - Priority Pass & Priority Pass Select - Graycliff Divans - after passport control and security checks, located at rear of terminal, 10 meters from the restrooms.
- San Jose, Costa Rica (SJO) - American Express Platinum and Priority Pass & Priority Pass Select - VIP Lounge Costa Rica - Located in front of Gate 5. Accessible and convenient for Southwest passengers.
- San Juan (SJU)- Priority Pass & Priority Pass Select - The Lounge San Juan at Terminal A - Lounge in Terminal A while Southwest flies from Terminal B, Juanefny confirms that all terminals are connected airside, so can access the lounge by foot..
- Priority Pass & Priority Pass Select - The Lounge San Juan at Terminal C - Lounge in Terminal A while Southwest flies from Terminal B, Juanefny confirms that all terminals are connected airside, so can access the lounge by foot.

not sure/ may be possible - need confirmation from someone who's done it firsthand:
- Puerto Vallarta (PVR) - Priority Pass & Priority Pass Select - VIP Lounge - Hall 1, located after Food Court, before the connecting hallway to the International Departure Area
- Punta Cana (PUJ) - Priority Pass & Priority Pass Select - VIP Lounge Punta Cana - Terminal A - after Security check and passport control - located on 2nd floor. Need FTers Reports on if this is accessible to Southwest passengers
Priority Pass & Priority Pass Select - VIP Lounge - Terminal B - after passport control, left side next to the food court and before the Gates on the 2nd floor. Need FTers Reports on if this is accessible to Southwest passengers
- Tampa (TPA)- Priority Pass & Priority Pass Select - The Café by Mise en Place - Airside F - near gate F85. Cardholders receive US$28 credit for themselves and per guest.

Can't use due to location of lounge (or possible if you don't mind clearing security twice, once to use the lounge, then at the terminal where Southwest flights depart):
- Baltimore (BWI) - Priority Pass & Priority Pass Select - The Club BWI, Located at D gates, near D10 and Dunkin Donuts. wetrat0 noted the lounge is fairly nice with a good selection of food and beverage but not particularly useful for Southwest passengers due to the need to re-clear security.
- Boston (BOS) - Priority Pass & Priority Pass Select - The Club at BOS - Terminal E - Southwest flies out of Terminal B, lounge is airside in Terminal E after security, and take elevator down 1 level.
Priority Pass & Priority Pass Select - Air France Graf Lounge - Terminal E - Southwest flies out of Terminal B, there is an Air France Graf lounge that is near Gate E4 (tucked away) but accessible in the secure area in Terminal E. Free drinks, snacks (cookies, cheese, crackers, chips, etc.). Free internet from Logan. Opens around 1:30 PM - 2 PM though.
- Minneapolis / St. Paul (MSP) - American Express Platinum - Terminal 1- Escape Lounge- The Escape Lounge is in the Terminal 1 while Southwest flies out of Terminal 2, so access would not be possible. ucdtim17 noted the new partnership with American Express and Escape Lounges.
- Orlando (MCO) - Priority Pass & Priority Pass Select - The Club MCO - Terminal A Concourse 1 - located near Gates 1-29, adjacent to XpressSpa - does not sound like easily accessible to Southwest passengers
- San Diego (SAN) - Priority Pass & Priority Pass Select - Aspire Lounge - Terminal 2, post security between Terminal 2 East security and the bridge to Terminal 2 West. Accessible to all Terminal 2 customers. Southwest flies from Terminal 1, so not accessible to Southwest passengers.

Hope this helps - feel free to add on to this list...

Thanks to HPN-HRL, cxn, ejmelton, ronbo83, jrpaguia, tusphotog, knoebelsPT, ksdavis, danielonn, Boraxo, FindAWay, justhere, amerjr999, smmrfld, shammers, nsx, northsider, elron938, ray1111, jco613, wetrat0, Zorak, ucdtim17, resteinmetz70112, Juanefny, worldwidedreamer, bearbear, NoStressHere, bobbybrown, LegalTender, tmiw, birdiedouble, Bearbear, synergistic, zachary, Franklin777, m907, Rd3, Reaching for your posts - I incorporated your feedback into my post.