| 1 | WPT | Wapiti Aviation Ltd. | Callsign: Wapiti, | CDN | AVCODES |
| 2 | WPT | World 2 Fly Portugal, S.A. | IATA: 3P, Callsign: New Blue, | P | AVCODES |
| 3 | WPT | Wapiti Aviation | | | ICAO1 |
| 4 | WPT | The Wabash-Pittsburgh Terminal Ry. (The Pittsburgh & West Virginia Ry. Co.) | 8/1920-7/1930 | | NAKINA |
| 5 | WPT | The Pittsburgh & West Virginia Ry. Co. | 7/1932 | | NAKINA |
| 6 | WPT | PITTSBURGH & WEST VIRGINIA RWY. CO. {WABASH-PITTSBURGH TERMINAL RWY.] | | | PWRC |
| 7 | WPT | WEST POINT TOURS INC | | | SCAC4 |
| 8 | WPTA | WESTERN PACIFIC TRANSPORT LTD | | | SCAC4 |
| 9 | WPTD | WP TRANSPORTATION INC | | | SCAC4 |
| 10 | WPTE | WESTERN PACIFIC TRANSPORT LLC | | | SCAC4 |
| 11 | WPTK | WHISPERING PINES TRUCKING INC | | | SCAC4 |
| 12 | WPTL | WALKER, P & T CAPITAL LTD | | | SCAC4 |
| 13 | WPTN | WALLPORT TRANSIT XPRESS INC | | | SCAC4 |
| 14 | WPTQ | WESTPOINT TRANSPORTATION INC | | | SCAC4 |
| 15 | WPTT | WESTERN PORTS TRANSPORTATION INC | | | SCAC4 |
| 16 | WPTZ | UNION PACIFIC RAILROAD COMPANY | | | PWRC |
| 17 | WPTZ | Western Pacific Railroad (Union Pacific Railroad) | | | RSRV |
| 18 | WPTZ | UNION PACIFIC RAILROAD COMPANY | | | SCAC4 |
