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MODERATOR'S NOTE

Here is the compiled list of bus companies serving NYC based on information in this thread:

Quote:

• Port Authority Bus Terminal | Carriers & Routes - main bus terminal in NYC (42nd St. & 8th Ave.), along with the George Washington Bridge Bus Station (178th St. & Broadway) and Journal Square Bus Terminal (Jersey City PATH Terminal, NJ)
  
  
• Academy Bus - northeastern US from Boston, MA to Washington, DC, including NJ, CT, Atlantic City; major charter company
• Bee-Line System - express service to/from Westchester, lower Putnam, Northern Bronx, NY; connects with Metro-North Railroad
• Bieber Tourways - to/from PA; also specializes in tours and charters
• BoltBus - daily express service to/from Washington, DC; additional service to/from Baltimore, MD, Boston, MA, Greenbelt, MD, Cherry Hill, NJ, Philadelphia, PA
• Campus-to-Campus - twice daily express service to/from Cornell University, Ithaca, NY
• Coach USA - and subsidiaries below; major charter company (Coach USA is a sister company of Coach America from the West and South)
  • Community Coach - to/from Morris and Essex Counties, NJ
  • Olympia Trails - to/from EWR airport, NJ
  • Red & Tan Tours - to/from Jersey City, Bayonne, North Bergen, NJ
  • Rockland Coaches - to/from Rockland County, NY and northern NJ
  • Short Line - to/from upstate NY, northern NJ, eastern PA
  • Suburban Transit - to/from Mercer, Middlesex, Somerset Counties, NJ
• DC2NY - express service to/from Washington, DC (Dupont Circle, Union Station, 14th between H&I)
• DeCamp Bus Lines - to/from northern NJ; stops by hail/request
• Express bus Service - to/from Paterson, NJ
• Greyhound - nationwide
• Martz Trailways - to/from CT, PA
• Megabus - northeastern, midwestern, and southeastern US
• Peter Pan Bus Lines - to/from MA, CT, Wilmington, DE, Washington, DC
• Lakeland Bus Lines - to/from northern NJ
• LimoLiner - express service to/from Boston, MA (Back Bay) and Framingham, MA (Mass Pike Park & Ride)
• NJ Transit Bus - to/from NJ
• Susquehanna Trailways - to/from PA
• Trailways (Adirondack, Pine Hill, New York) - to/from mid-Hudson Valley region, NY
• Trans-Bridge Lines - to/from PA
• Tripper Bus - to/from Bethesda, MD and Arlington, VA
• Vamoose Bus - to/from Bethesda, MD and Arlington, VA
• Washington Deluxe - express service to/from Washington, DC (Dupont Circle, 15th between K&L, Union Station)
  
  
• Chinatown Bus | GotoBus.com Centralized Booking Website - operated by companies below
  • A One Bus
  • AA Bus - to/from Baltimore, MD, Wilmington, DE, Albany, NY, Norfolk, VA, Virginia Beach, VA, Newport News, VA, Kingston, NY, Smyrna, DE, Dover, DE
  • All State Bus - to/from Penn State University, State College, PA
  • Apex - to/from Wasington, DC, Philadelphia, PA, Richmond, VA, Atlanta, GA and other destinations
  • Blue Sky Bus - to/from Virginia Beach, VA
  • Boston Deluxe - to/from Boston, MA, Hartford, CT
  • Coach 88 - to/from Norfolk, VA, Hampton, VA
  • Double A Bus - to/from Chicago, IL (Mon, Wed, Sat only)
  • Double Happiness
  • Eastern Travel - to/from Washington, DC, Baltimore, MD, Philadelphia, PA, Rockville, MD, Richmond, VA
  • Everyday Bus - to/from Norfolk, VA, Newport News, VA, Virginia Beach, VA, Albany, NY, Kingston, NY
  • Fung-Wah - to/from Boston, MA
  • Great Wall Bus - to/from York, PA, Harrisburg, PA, Pittsburgh, PA
  • Horse Run - to/from Atlanta, GA, Anderson, SC, Greenville, SC, Birmingham, AL, Spartanburg, SC and other destinations
  • I95Coach - to/from Orlando, FL, Tampa, FL
  • KK Bus (Sheng Hui Bus) - to/from Penn State University, State College, PA, Turning Stone Casino, NY
  • Long Lucky Bus - to/from Mohegan Sun Casino, CT, Norwich, CT
  • Lucky Star Bus - to/from Boston, MA
  • MVP Bus - to/from Washington, DC, Baltimore, MD
  • New Century Travel - to/from Philadelphia, PA, Washington, DC, Baltimore, MD, Richmond, VA
  • NY Tiger - to/from Virginia Beach, VA
  • Ocean Travel - to/from Buffalo, NY, Rochester, NY, Syracuse, NY
  • Sky Line Bus - to/from Wilkes-Barre, PA, Penn State University, State College, PA, Allentown, PA
  • Sky Express - to/from Raleigh, NC, Durham, NC, Greensboro, NC, Charlotte, NC, Fayetteville, NC, Columbia, SC
  • Sunshine Travel - to/from Boston, MA
  • Today’s Bus - to/from Colonia Heights, VA, Newport News, VA, Virginia Beach, VA, Richmond, VA
  • Tripper Bus - to/from Bethesda, MD, Arlington, VA
  • Universe Bus - to/from Philadelphia, PA
  • Virginia Seagull - to/from Dayton, OH, Cincinnati, OH
  • World Wide Bus - to/from Cambridge, MA, Newton, MA

For an excellent article on traveling on the Chinatown buses and related operators, see this article found by jerry a. laska:

NYTimes: Frugal Traveler - A Guide to Cheap Buses (Including How to Score $1 Tickets)

dstan
NYC Forum Moderator
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I know there a bunch, so it may be difficult (I'll be glad to help if you'd like,) but I think it's worth adding the different bus companies that serve the city. A lot of people ask me about different buses to take, and I think it'd be helpful.

Off the top of my head, I can only name a few, but I'm exhausted, so I'll try to add more tomorrow:

• Grey Hound
• DeCamp
• NJ Transit (listed already, but only the trains)
• Bolt Bus
• Lakeland
• Coach USA (and subsidiaries)
• Lakeland (still though?)