| 401 | WAV | Warbelow's Air Ventures, Inc. | IATA: 4W, Callsign: Warbelow, ICAO designator changed from VNA. ICAO callsign changed from Ventaire | USA | AVCODES |
| 402 | WAVE | WAVELINE TRANSPORT LTD | | | SCAC4 |
| 403 | WAVH | WAREHOUSE SERVICES INC | | | SCAC4 |
| 404 | WAVL | WAVES LOGISTICS INC | | | SCAC4 |
| 405 | WAVO | WAVERLY OIL COMPANY INC | | | SCAC4 |
| 406 | WAVS | WHITE ARROW SERVICE STATIONS INC | | | SCAC4 |
| 407 | WAVX | Waverly Oil Works Co. | 7/1930-7/1932 | | NAKINA |
| 408 | WAVX | Waverly Oil Works Co. (General American Tank Car Corp.) | 7/1935 | | NAKINA |
| 409 | WAVX | General American Transportation Corp. | 7/1937-4/1938 | | NAKINA |
| 410 | WAVX | Waverly Oil Works Co. (General American Transportation Corp.) | Apr-38 | | NRHS |
| 411 | WAVX | WAVERLY OIL WORKS CO. (GENERAL AMERICAN TRANSPORTATION CCORP.) | | | PWRC |
| 412 | WAW | Wings Airways | Callsign: Wing Shuttle, | USA | AVCODES |
| 413 | WAW | Wings Airways | | | ICAO1 |
| 414 | WAW | Waynesburg & Washington R.R. Co. | 1/1975 | | NAKINA |
| 415 | WAW | Consolidated Rail Corp. | 1/1980 | | NAKINA |
| 416 | WAW | Waynesburg & Washington R.R. Co. | Jan-75 | | NRHS |
| 417 | WAW | Consolidated Rail Corp. | Jan-80 | | NRHS |
| 418 | WAW | *CONSOLIDATED RAIL CORP. [WAYNESBURG & WASHINGTON RR.] | | | PWRC |
| 419 | WAW | *WILMINGTON & WESTERN RAILROAD CO. | | | PWRC |
| 420 | WAW | Waynesburg & Washington Railroad (Conrail) | | | RSRV |
| 421 | WAWA | WALLA WALLA FARMERS COOP INC | | | SCAC4 |
| 422 | WAWL | WILDLIFE ART WORKS LTD | | | SCAC4 |
| 423 | WAWT | WAW TRUCKING INC | | | SCAC4 |
| 424 | WAX | World Air Cargo | Callsign: Cargo Bird, | F | AVCODES |
| 425 | WAXL | WESTPORT AXLE CO | | | SCAC4 |
| 426 | WAXP | WESTERN AIR EXPRESS | | | SCAC4 |
| 427 | WAXT | WAX TRANS INC | | | SCAC4 |
| 428 | WAXU | WESTWOOD SHIPPING LINES | | | SCAC4 |
| 429 | WAY | Airways | Callsign: Garonne, | F | AVCODES |
| 430 | WAY | Bates Aviation, Inc. | Callsign: Wingair, | USA | AVCODES |
| 431 | WAY | Wayra Peru S.A.C. | IATA: 7W, Callsign: Wayraperu, | PE | AVCODES |
| 432 | WAY | Airways | | | ICAO1 |
| 433 | WAY | Wayraperú | | PE | TRAFFIC |
| 434 | WAYC | WAYNE TAYLOR RACING LLC | | | SCAC4 |
| 435 | WAYE | WAY EXPRESS INC, THE | | | SCAC4 |
| 436 | WAYI | WAYNO TRANSPORT INC | | | SCAC4 |
| 437 | WAYM | WAY DELIVERY SERVICES | | | SCAC4 |
| 438 | WAYO | WAY OIL COMPANY INC | | | SCAC4 |
| 439 | WAYP | WAY TRANSPORTATION COMPANY INC | | | SCAC4 |
| 440 | WAYU | SHANGHAI WAYSMOS FINE CHEMICAL CO.,LTD. | | PRC | BIC |
| 441 | WAZ | Wizz Air Abu Dhabi d/b/a Wizz Air | IATA: 5W, Callsign: Wizz Sky, Commenced operations 15 January 2021. Subsidary of Wizz Air Hungary. | UAE | AVCODES |
| 442 | WAZE | WAZ EXPRESS | | | SCAC4 |
| 443 | WB | Servicios Aereos Nacionales (SAN), S.A. | ICAO: SAN, Callsign: Aereos, Founded in 1964. Ceased operations in 1999. | EC | AVCODES |
| 444 | WB | Rwandair Express | ICAO: RWD, Callsign: Rwandair, Commenced operations on 01 December 2002. IATA code changed to WB | RWA | AVCODES |
| 445 | WB | Rwandair Express | ICAO: RWD, Callsign: Rwandair, Commenced operations on 01 December 2002. Name changed to RwandAir Limited in March 2009. IATA code changed from WB* | RWA | AVCODES |
| 446 | WB | RwandAir Limited | ICAO: RWD, Callsign: Rwandair, Commence operation on 01 December 2002. Name changed from Rwandair Express in March 2009. IATA code changed from WB* | RWA | AVCODES |
| 447 | WB | Weserbahn | Bremen | D | privat-bahn.de |
| 448 | WB | WiehltalBahn GmbH | Wiehl | D | privat-bahn.de |
| 449 | WB | Waldenburgerbahn | | CH | TRAFFIC |
| 450 | WB | Wales& Borders Trains | | UK | VKM |
| 451 | WB&A | Washington, Baltimore and Annapolis Electric R.R. Co. | 7/1923-7/1935 | | NAKINA |
| 452 | WB&A | WASHINGTON, BALTIMORE & ANNAPOLIS ELECTRIC RAILROAD CO. | | | PWRC |
| 453 | WBA | Etela-Pohjanmaan Lentokeskus Oy (West Bird Aviation) | IATA: FC, Callsign: Westbird, | FIN | AVCODES |
| 454 | WBA | Finnish Commuter Airlines Oy | IATA: FC, Callsign: Westbird, ICAO designator changed to FCM. ICAO callsign changed to Finncomm. Name changed from Finnish Commuter Airlines Oy dba West Bird Aviation | FIN | AVCODES |
| 455 | WBA | Finnish Commuter Airlines Oy | IATA: FC, Callsign: Westbird, Name changed to Finncomm | FIN | AVCODES |
| 456 | WBA | Air Albatros | Callsign: albajet, Ceased operations. | F | AVCODES |
| 457 | WBA | Finncomm Airlines | IATA: FC | | ICAO1 |
| 458 | WBA | Wadle Bauuternehmung GmbH, Altheim | | DE | VKM |
| 459 | WBAC | WEBSTER, AL CLASSIC CARS | | | SCAC4 |
| 460 | WBAI | WRIGHT BROTHERS AERO INC | | | SCAC4 |
| 461 | WbÄJ | Varberg - Ätran Järnväg | 1911 - 1936 | S | svenska-lok.se |
| 462 | WBAO | WOOD BOYS TRANSPORT | | | SCAC4 |
| 463 | WBAV | WARBELOWS AIR VENTURES INC (AIR COD | | | SCAC4 |
| 464 | WBB | Windbergbahn e.V. | Dresden | D | privat-bahn.de |
| 465 | WBBI | WBB INVESTMENTS LLC | | | SCAC4 |
| 466 | WBBM | WALLACEBURG BOOKBINDING AND MFG CO | | | SCAC4 |
| 467 | WBBQ | WILLIAMSON BROS BAR-B-Q | | | SCAC4 |
| 468 | WBBR | WEBBS TRANSPORTATION CO | | | SCAC4 |
| 469 | WBBS | WISENBAKE | | | SCAC4 |
| 470 | WBC | FTV Aviation, LLC | Callsign: Wabac, | USA | AVCODES |
| 471 | WBC | Wilkes-Barre Connecting R.R. | 1/1975-1/1980 | | NAKINA |
| 472 | WBC | Wilkes-Barre Connecting R.R. | 1/75-1/80 | | NRHS |
| 473 | WBC | WILKES-BARRE CONNECTING RAILROAD | | | PWRC |
| 474 | WBC | Wilkes-Barre Connecting Railroad | | | RSRV |
| 475 | WBC | Wycombe Bus Company | | GB | TRAFFIC |
| 476 | WBCA | WESTERN BULK CARRIERS | | | SCAC1 |
| 477 | WBCG | WBC TRUCKING INC | | | SCAC4 |
| 478 | WBCH | WILGENBUSCH CHAROLAIS | | | SCAC4 |
| 479 | WBCL | WATERLOO BEDDING COMPANY LIMITED | | | SCAC4 |
| 480 | WBCN | W B CONTAINER SERVICE | | | SCAC4 |
| 481 | WBCP | WESTERN BULK CARRIERS AS | | | SCAC4 |
| 482 | WBCQ | WOODRUFF BLOCK COMPANY INC | | | SCAC4 |
| 483 | WBCR | Wabash Central R.R. Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 484 | WBCR | Wabash Central R.R. Corp. | added 7/98; 7/2000 | | NRHS |
| 485 | WBCR | WABASH CENTRAL RAILROAD | | | PWRC |
| 486 | WBCR | Wabash Central Railroad Corporation | | | RSRV |
| 487 | WBCR | WABASH CENTRAL RAILROAD CORPORATION | | | SCAC4 |
| 488 | WBCS | WESTBANK CONTAINER SERVICES INC (DI | | | SCAC4 |
| 489 | WBCW | WESTWOOD BANANA CO INC | | | SCAC4 |
| 490 | WBCX | Warren Bros. Co. | 8/1920 | | NAKINA |
| 491 | WBCX | Williams Bros. Concrete, Inc. | added 11/1973; 1/1975-1/1980; eliminated 7/1985 | | NAKINA |
| 492 | WBCX | Williams Bros., Inc. | added 7/1985; eliminated 4/1991 | | NAKINA |
| 493 | WBCX | Williams Bros. Division, Blue Circle Inc. | added 4/1991; eliminated 1/1994 | | NAKINA |
| 494 | WBCX | Blue Circle Inc. | added 1/1994; 7/2000-7/2005 | | NAKINA |
| 495 | WBCX | Williams Bros. Concrete, Inc. | added 11/73; 1/75-1/80 | | NRHS |
| 496 | WBCX | Williams Bros., Inc. | eliminated 4/91 | | NRHS |
| 497 | WBCX | Williams Bros. Division, Blue Circle Inc. | added 4/91; eliminated 1/94 | | NRHS |
| 498 | WBCX | Blue Circle Inc. | added 1/94; 7/2000 | | NRHS |
| 499 | WBCX | *WARREN BROS. CO. | | | PWRC |
| 500 | WBCX | +BLUE CIRCLE, INC. [WILLIAMS BROTHERS INC.] | | | PWRC |
