| * | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | [W] | Y | Z |
| Term | Definition |
| W | Booking class - use varies depending upon airline |
| WAITLIST | A list of passengers requesting seats on full flights that might become available as a result of cancellation. Airline programs' elite-level members are often offered priority waitlisting. |
| Warm Nuts | On many flights, First Class is served warm nuts. FTers seem to have an additional definition for this term. |
| Waterside | AKA Waterworld (BA HQ) |
| Wave | Mountain wave turbulence that has a seesaw motion to pax but can also be accompanied by moderate or better turbulence. Generally found downwind of mountains out to 1000 miles when strong winds aloft are present. |
| WBI | Whole Body Imaging |
| WC | World Club |
| WEI | Weapons, Explosives and Incendiaries |
| Wet Lease | A wet lease is a leasing arrangement whereby one airline (lessor) provides an aircraft, complete crew, maintenance, and insurance (ACMI) to another airline (lessee), which pays by hours operated. The lessee provides fuel and covers airport fees, and any other duties, taxes, etc. The flight uses the flight number of the lessee. A wet lease generally lasts one month to two years; anything less would be considered an ad-hoc charter. A wet lease is typically utilized during peak traffic seasons or annual heavy maintenance checks, or to initiate new routes. A wet leased aircraft may be used to fly services into countries where the lessee is banned from operating..http |
| WHQ | World Headquarters. Used a lot on the United board. |
| Wi-Fi lice | non-lounge users who hang out near lounges to use WiFi signals |
| Widget | The term used for the triangular-shaped logo device that officially represents Delta Air Lines. |
| Wilco | "Will Comply," now rarely used in radio communications (e.g., with control tower) |
| WK | UA (K)Cancelled, for a city pair segment where the flight number changed |
| WL | UA Waitlist |
| WM | Wal-Mart |
| WN | Southwest Airlines |
| Worldspan | Electronic reservations system used by many airlines and travel agents. |
| WRT | Internet lingo meaning "With Regards To" |
| WSJ | Wall Street Journal, or ANY broadsheet news paper (difficult to read when your knees are up around your nose!) |
| WT | World Traveller (Long haul economy class) |
| WT+ | World Traveller Plus (Long haul premium economy class) |
| WTMD | Walk-Through Metal Detector |
| WX | Weather |
