| 1201 | WDWI | WEBER DISTRIBUTION WAREHOUSES INC | | | SCAC4 |
| 1202 | WDWJ | WADDELL-WOJCIK TRUCKING INC | | | SCAC4 |
| 1203 | WDWK | WOODWORKS | | | SCAC4 |
| 1204 | WDWP | WINDOW PRODUCTS INC | | | SCAC4 |
| 1205 | WDWS | WOODWORTH & SONS INC | | | SCAC4 |
| 1206 | WDWT | WOODWARDS TRUCKING | | | SCAC4 |
| 1207 | WDX | Wieland Dairy Co. (General American Tank Car Corp.) | 7/1930-7/1932 | | NAKINA |
| 1208 | WDX | Wieland's (Borden-Wieland, Inc.) | 7/1935 | | NAKINA |
| 1209 | WDX | GENERAL AMERICAN TANK CAR CORP. (WIELAND DAIRY CO.) | | | PWRC |
| 1210 | WDXC | WANTED TRANSPORT LLC | | | SCAC4 |
| 1211 | WDXE | WINN DIXIE STORES INC | | | SCAC4 |
| 1212 | WDXP | WHITE DIAMOND EXPRESS LLC | | | SCAC4 |
| 1213 | WDXR | WALDEN TRANSPORT & RECYCLE | | | SCAC4 |
| 1214 | WDXS | WADDY XPRESS | | | SCAC4 |
| 1215 | WDY | Chicago Express Airlines, Inc. | IATA: C8, Callsign: Windycity, Designator C8 reinstated by IATA. ATA Connection carrier | USA | AVCODES |
| 1216 | WDY | Phoenix Airline Services, Inc. | Callsign: Windycity, | USA | AVCODES |
| 1217 | WDY | Chicago Jet Group, LLC | Callsign: Windycity, | USA | AVCODES |
| 1218 | WDY | Phoenix Airline Services | | | ICAO1 |
| 1219 | WDY | Chicago Express | IATA: C8 | | ICAO1 |
| 1220 | WDYA | WOODY ACRES TRUCKING | | | SCAC4 |
| 1221 | WDYI | WOODYS TRUCKING LLC | | | SCAC4 |
| 1222 | WDYK | WARD, DANNY TRUCKING | | | SCAC4 |
| 1223 | WDYL | WOODYS TRANSPORT LLC | | | SCAC4 |
| 1224 | WDYP | WOODYS PETROLEUM | | | SCAC4 |
| 1225 | WDYR | WOODYS TRUCKIN LLC | | | SCAC4 |
| 1226 | WDYS | WANNERS DELIVERY SERVICE | | | SCAC4 |
| 1227 | WDYT | WESTERN DAIRY TRANSPORT L L C | | | SCAC4 |
| 1228 | WDZ | WYANDOT DOLOMITE | | | PWRC |
| 1229 | WE | Rheintalflug Seewald Gesellschaft mbH | ICAO: RTL, Callsign: Rheintal, IATA Prefix: 915, Name changed to Rheintalflug Vorarlberger Luftfahrtgi | A | AVCODES |
| 1230 | WE | Centurion Air Cargo, Inc. | ICAO: CWC, Callsign: Challenge Cargo, IATA Prefix: 307, AOC surrendered in June 2018. Name changed from Challenge Air Cargo Inc w.e.f. 20 July 2001. Desginator WE reinstated by IATA | USA | AVCODES |
| 1231 | WE | Challenge Air Cargo, Inc. | ICAO: CWC, Callsign: Challenge Cargo, IATA Prefix: 307, Name changed to Centurion Air Cargo Inc. w.e.f. 20 July 2001. | USA | AVCODES |
| 1232 | WE | Rheintalflug Vorarlberger Luftfahrtgi | ICAO: RTL, Callsign: Rheintal, IATA Prefix: 915, Ceased operations on 31 December 2002. Desginator WE* reinstated by IATA. Name changed from Rheintalflug Seewald Gesellschaft mbH | A | AVCODES |
| 1233 | WE | Air Trader Sweden AB | Callsign: Trader, | S | AVCODES |
| 1234 | WE | Westward Airways Ltd. | | GB | AVCODES |
| 1235 | WE | WDL Flugdienst | | D | AVCODES |
| 1236 | WE | Thai Smile Airways Company Limited | ICAO: THD, Callsign: Thai Smile, IATA Prefix: 909, Founded in May 2011. Commenced operations on 07 July 2012. | T | AVCODES |
| 1237 | WE | Wheeling and Lake Erie Ry. Co. | added 10/1990; 1/1994-7/2005 | | NAKINA |
| 1238 | WE | Wheeling and Lake Erie Ry. Co. | added 10/90; 1/94-7/2000 | | NRHS |
| 1239 | WE | WHEELING & LAKE ERIE RAILWAY COMPANY | | | PWRC |
| 1240 | WE | Wheeling and Lake Erie Railway | | | RSRV |
| 1241 | WE | WHEELING & LAKE ERIE RAILWAY COMPAN | | | SCAC4 |
| 1242 | WE | Woxna Express | 1994 - 1999 | S | svenska-lok.se |
| 1243 | WE | Woxna Express | 1994 - 1999 | S | TRAFFIC |
| 1244 | WE | Werra-Eisenbahnverkersgesellschaft mbH | | DE | VKM |
| 1245 | WE&L | Windsor, Essex & Lake Shore Rapid Ry. Co. | 7/1923-7/1932 | | NAKINA |
| 1246 | WE&L | WINDSOR, ESSEX & LAKE SHORE RAPID RWY. CO. | | | PWRC |
| 1247 | WEA | White Eagle Aviation Ltd. | IATA: W2, Callsign: White Eagle, | PL | AVCODES |
| 1248 | WEA | Windward Express Airways N.V. | Callsign: Daystar, | NA | AVCODES |
| 1249 | WEA | White Eagle Aviation | | | ICAO1 |
| 1250 | WEAD | WESTERN STATES LOGISTICS | | | SCAC4 |
| 1251 | WEAJ | WESTERN AG INDUSTRIES, INC | | | SCAC1 |
| 1252 | WEAJ | WESTERN AG INDUSTRIES INC | | | SCAC4 |
| 1253 | WEAL | Wealden of London | | GB | TRAFFIC |
| 1254 | WEAP | WESTSIDE TRANSPORT | | | SCAC4 |
| 1255 | WEAS | WEST COAST AGENCIES, INC | | | SCAC1 |
| 1256 | WEAS | WEST COAST AGENCIES LLC | | | SCAC4 |
| 1257 | WEAV | WEAVER, M M & SONS INC | | | SCAC4 |
| 1258 | WEAW | WEE HAUL LLC | | | SCAC4 |
| 1259 | WEAX | ACI Co. | added 4/1976; eliminated 1/1979 | | NAKINA |
| 1260 | WEAX | ACI Co. | added 4/76; eliminated 1/79 | | NRHS |
| 1261 | WEAX | ACI COMPANY | | | PWRC |
| 1262 | WEAX | ACI COMPANY | | | SCAC4 |
| 1263 | WEAY | WINDAUS ENERGY INC | | | SCAC4 |
| 1264 | WEB | Webjet Linhas Aéreas | IATA: WJ, Callsign: Webjet, IATA designator changed to WH*. | BR | AVCODES |
| 1265 | WEB | Webjet Linhas Aéreas | IATA: WH, Callsign: Webjet, Founded in 2005. Ceased operations on 23 November 2012. Designator WH* reinstated by IATA. IATA designator changed from WJ* | BR | AVCODES |
| 1266 | WEB | WebJet Linhas Aéreas | IATA: WJ | | ICAO1 |
| 1267 | WEBA | Westerwaldbahn GmbH | Steinebach | D | privat-bahn.de |
| 1268 | WEBA | WEBA: Westerwaldbahn GmbH | | D | TRAFFIC |
| 1269 | WEBA | Westerwaldbahn | | DE | VKM |
| 1270 | WEBC | WEBER TRUCK AND WAREHOUSE | | | SCAC1 |
| 1271 | WEBC | WEBB LOGISTICS LLC | | | SCAC4 |
| 1272 | WEBE | WEST BEND TRANSIT & SERVICE COMPANY | | | SCAC1 |
| 1273 | WEBE | WEST BEND TRANSIT & | | | SCAC4 |
| 1274 | WEBF | WILD EYES BOAR FARM | | | SCAC4 |
| 1275 | WEBG | WEBSTER & GARNER INC | | | SCAC4 |
| 1276 | WEBM | WEBB CO INC, THE | | | SCAC4 |
| 1277 | WEBN | WESTERN GRAIN DRYER INC | | | SCAC4 |
| 1278 | WEBQ | WEST COAST FLORAL GROWERS & DISTRIB | | | SCAC4 |
| 1279 | WEBU | AVES ONE AG | | D | BIC |
| 1280 | WEC | Universal Airlines, Inc. | Callsign: Airgo, | USA | AVCODES |
| 1281 | WEC | Universal Airlines | | | ICAO1 |
| 1282 | WEC | WALKER ESTATE CORP., A. T. | | | PWRC |
| 1283 | WECC | W E C LINES B V | | | SCAC4 |
| 1284 | WECD | WEIDA FREIGHT SYSTEM CO LTD | | | SCAC4 |
| 1285 | WECG | WEBERS DE BAJA CALIFORNIA SA DE CV | | | SCAC4 |
| 1286 | WECK | WECKERLY FARMS | | | SCAC4 |
| 1287 | WECL | WESCO OIL INC | | | SCAC4 |
| 1288 | WECM | WEST COAST MILL SUPPLIES INC | | | SCAC4 |
| 1289 | WECN | WILSON EURO CARRIERS AS | | | SCAC4 |
| 1290 | WECO | WELLCO TANK TRUCKS INC | | | SCAC4 |
| 1291 | WECP | WEBER, BOB INC | | | SCAC4 |
| 1292 | WECU | WEC LINES BV | | NL | BIC |
| 1293 | WECU | WEC LINES | | | SCAC4 |
| 1294 | WECX | Westinghouse Electric Corp. | 1/1952-7/2005; eliminated 1/2009/TD> | | NAKINA |
| 1295 | WECX | Westinghouse Electric Corp. | 1/52-7/2000 | | NRHS |
| 1296 | WECX | WESTINGHOUSE ELECTRIC CORP. | | | PWRC |
| 1297 | WECX | Westinghouse Electric Corporation | | | RSRV |
| 1298 | WECY | WILES ENTERPRISES CO INC | | | SCAC4 |
| 1299 | WECZ | WESTERN CONSTRUCTION COMPANY | | | PWRC |
| 1300 | WED | Anhui Sky-Aviation International Flight Academy Company Ltd. | Callsign: Wenda, | PRC | AVCODES |
