| 18301 | CW | Air Marshall Islands, Inc. | ICAO: MRS, Callsign: Marshall Islands, IATA Prefix: 778, Name changed from Airline of the Marshall Islands | MH | AVCODES |
| 18302 | CW | Air Continental Ltd. | ICAO: CWA, Callsign: Aircontinental, | GB | AVCODES |
| 18303 | CW | Channel Airways | Callsign: Channel Air, | GB | AVCODES |
| 18304 | CW | Air Swazi Cargo (Pty) Ltd. | ICAO: ZSC, Callsign: Swazi Cargo, ICAO designator changed to CWS | SD | AVCODES |
| 18305 | CW | Airline of the Marshall Islands | ICAO: MRS, Callsign: Marshall Islands, IATA Prefix: 778, Name changed to Air Marshall Islands, Inc. | MH | AVCODES |
| 18306 | CW | Chinggis Airways LLC | ICAO: CHS, Established in August 2011. Operations not started. | MGL | AVCODES |
| 18307 | CW | Air Cargo Global s.r.o. | ICAO: CCC, Callsign: Global Cargo, IATA Prefix: 159, IATA Designator changed to CW*. IATA Designator changed from UB. | SK | AVCODES |
| 18308 | CW | Air Cargo Global s.r.o. | ICAO: CCC, Callsign: Global Cargo, IATA Prefix: 159, Ceased opeations in December 2019. IATA Designator changed from CW. IATA Designator changed from UB. | SK | AVCODES |
| 18309 | CW | SkyWest Charter LLC | ICAO: SCW, Callsign: Charter West, Subsidiary of SkyWest Airlines. | USA | AVCODES |
| 18310 | CW | Colorado & Wyoming Ry. Co. | 1/1975-7/2005 | | NAKINA |
| 18311 | CW | Colorado & Wyoming Ry. Co. | 1/75-7/2000 | | NRHS |
| 18312 | CW | COLORADO & WYOMING RY. | | | PWRC |
| 18313 | CW | Colorado and Wyoming Railroad | | | RSRV |
| 18314 | CW | COLORADO & WYOMING RAILWAY | | | SCAC4 |
| 18315 | CW | Colorado & Wyoming Ry. Co. | | USA | TRAFFIC |
| 18316 | CW&E | The Chatham, Wallaceburg & Lake Erie Ry. Co. | 8/1920-7/1930 | | NAKINA |
| 18317 | CW&E | Chatham, Wallaceburg & Lake Erie Ry. Co. | 23-Jul | | NRHS |
| 18318 | CW&E | CHATHAM, WALLACEBURG & LAKE ERIE RWY. CO. | | | PWRC |
| 18319 | CWA | Air Continental Ltd. | IATA: CW, Callsign: Aircontinental, | GB | AVCODES |
| 18320 | CWA | Canada West Air Ltd. | Callsign: Canada West, | CDN | AVCODES |
| 18321 | CWA | Canadian Western Airlines, Inc. | IATA: W2, Callsign: Canada Western, Founded in 2002. Ceased operations in 2004. | CDN | AVCODES |
| 18322 | CWA | Can West Corporate Air Charters Ltd. | Callsign: Can West, | CDN | AVCODES |
| 18323 | CWA | Canadian Western Airlines | IATA: W2 | | ICAO1 |
| 18324 | CWA | Central Washington R.R. Co. | 7/2005 | | NAKINA |
| 18325 | CWA | CENTRAL WASHINGTON RAILROAD CO. | | | PWRC |
| 18326 | CWA | CENTRAL WASHINGTON RAILROAD COMPANY | | | SCAC4 |
| 18327 | CWAA | CENTRAL WISCONSIN AUTO AUCTION INC | | | SCAC3 |
| 18328 | CWAC | C & C TRUCKING | | | SCAC3 |
| 18329 | CWAD | CONNER WAREHOUSING & DISTRIBUTION | | | SCAC3 |
| 18330 | CWAE | CHIPPEWA AIR EXPRESS INC | | | SCAC3 |
| 18331 | CWAG | CWA FREIGHT SYSTEMS INC | | | SCAC3 |
| 18332 | CWAG | Cargowaggon | | EU | TRAFFIC |
| 18333 | CWAH | CRUISE, WAYNE H TRUCK LINE | | | SCAC3 |
| 18334 | CWAK | COUNTRY WIDE MOVING & STORAGE INC | | | SCAC4 |
| 18335 | CWAL | CARLEN, WALTER L | | | SCAC3 |
| 18336 | CWAM | COWAN TRANSPORTATION INC | | | SCAC3 |
| 18337 | CWAM | CAUSEWAY MARINE LLC | | | SCAC4 |
| 18338 | CWAN | CONAWAY TRUCKING & RACING LLC | | | SCAC4 |
| 18339 | CWAO | CATHERWOOD, ALBERT | | | SCAC3 |
| 18340 | CWAO | CORNWALL ROOF TRUSS LTD | | | SCAC4 |
| 18341 | CWAP | CAMWAY TRANSPORTATION CORPORATION | | | SCAC3 |
| 18342 | CWAQ | COMMONWEALTH WAREHOUSE & TRUCKING I | | | SCAC3 |
| 18343 | CWAQ | COMMONWEA | | | SCAC4 |
| 18344 | CWAR | CRISTINA WAREHOUSE CO INC | | | SCAC3 |
| 18345 | CWAS | COWAN SYSTEMS LLC | | | SCAC4 |
| 18346 | CWAT | CRESTWAY TRANSPORTATION | | | SCAC3 |
| 18347 | CWAU | CHS | | | RSRV |
| 18348 | CWAV | CALIFORNIA WAVES | | | SCAC4 |
| 18349 | CWAW | COWAN SYSTEMS LLC (BROKERAGE DIV) | | | SCAC4 |
| 18350 | CWB | CROSWELL OF WILLIAMSBURG LLC | | | SCAC4 |
| 18351 | CWBA | CAL-WEST TARIFF BUREAU INC | | | SCAC3 |
| 18352 | CWBA | COWBOY TRUCKING INC | | | SCAC4 |
| 18353 | CWBC | CWB TOURS INC | | | SCAC3 |
| 18354 | CWBF | CWB TRANSPORT INC | | | SCAC4 |
| 18355 | CWBG | CON-WAY MULTIMODAL | | | SCAC4 |
| 18356 | CWBH | COWBOY MOBILE HOME MOVERS INC | | | SCAC3 |
| 18357 | CWBH | COWBOYS MOBILE HOMES INC | | | SCAC4 |
| 18358 | CWBI | CARTWRIGHT, BILL | | | SCAC3 |
| 18359 | CWBK | C W BROKERAGE | | | SCAC4 |
| 18360 | CWBL | CARRAWAY, BILL TRUCKING | | | SCAC3 |
| 18361 | CWBL | COWBOY USA LLC | | | SCAC4 |
| 18362 | CWBM | CAL WESTERN BOAT MOVERS INC | | | SCAC3 |
| 18363 | CWBM | CAL WESTERN BOAT MOVERS | | | SCAC4 |
| 18364 | CWBO | COWBOY OIL CO | | | SCAC3 |
| 18365 | CWBO | COWBOY OIL CO | | | SCAC4 |
| 18366 | CWBP | CWB TRUCKING INC | | | SCAC4 |
| 18367 | CWBQ | CITY WAREHOUSE CORP OF BALTIMORE | | | SCAC3 |
| 18368 | CWBR | COWBOY TRUCKING | | | SCAC3 |
| 18369 | CWBS | CRAWFORD BUS SERVICE INC | | | SCAC3 |
| 18370 | CWBT | COWAN BOAT TRANSFER INC | | | SCAC3 |
| 18371 | CWBT | CLEARWATER BOAT SALES | | | SCAC4 |
| 18372 | CWBV | CWTS INC | | | SCAC4 |
| 18373 | CWBX | C.W. Brooks, Inc. | added 7/1993; 1/1994-7/2005 | | NAKINA |
| 18374 | CWBX | C.W. Brooks, Inc. | added 7/93; 1/94-7/2000 | | NRHS |
| 18375 | CWBX | C. W. BROOKS, INC. | | | PWRC |
| 18376 | CWBX | C. W. Brooks | | | RSRV |
| 18377 | CWBX | C W BROOKS INC | | | SCAC4 |
| 18378 | CWBY | COWBOY EXPRESS | | | SCAC4 |
| 18379 | CWC | Centurion Air Cargo, Inc. | IATA: WE, 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 |
| 18380 | CWC | Challenge Air Cargo, Inc. | IATA: WE, Callsign: Challenge Cargo, IATA Prefix: 307, Name changed to Centurion Air Cargo Inc. w.e.f. 20 July 2001. | USA | AVCODES |
| 18381 | CWC | Challenge Air Cargo, Inc. | IATA: GJ, Callsign: Challenge Cargo, IATA designator changed to WE. Founded on 08 November 1985. | USA | AVCODES |
| 18382 | CWC | Centurion Air Cargo | IATA: WE | | ICAO1 |
| 18383 | CWC | Seaboard Coast Line R.R. Co. (Charleston & Western Carolina) | 1/1975-1/1980 | | NAKINA |
| 18384 | CWC | Seaboard Coast Line R.R. Co. (Charleston & Western Carolina) | 1/75-1/80 | | NRHS |
| 18385 | CWC | SEABOARD COAST LINE RAILROAD CO. [CHARLESTON & WESTERN CAROLINA RY] | | | PWRC |
| 18386 | CWC | Charleston & Western Carolina R.R. | | USA | TRAFFIC |
| 18387 | CWCA | COLDWAY CARRIERS INC | | | SCAC3 |
| 18388 | CWCA | CAN WEST COMPONENT SERVICES INC | | | SCAC4 |
| 18389 | CWCA | Centurion Air Cargo | Real: CWC | USA | TRAFFIC |
| 18390 | CWCB | CROWLEY CARIBBEN TRANSPORT | | | SCAC3 |
| 18391 | CWCB | CONCEPTS WEST CORP | | | SCAC4 |
| 18392 | CWCC | COMMONWEALTH CARRIER CORPORATION | | | SCAC3 |
| 18393 | CWCC | COUSINS WASTE CONTROL LLC | | | SCAC4 |
| 18394 | CWCD | CARR, B W | | | SCAC3 |
| 18395 | CWCE | CON-WAY CENTRAL EXPRESS INC | | | SCAC3 |
| 18396 | CWCE | CON-WAY FREIGHT CENTRAL (DIV OF CON | | | SCAC4 |
| 18397 | CWCF | COUNTY WIDE CARTAGE | | | SCAC3 |
| 18398 | CWCG | CALLAWAY CARTAGE INC | | | SCAC3 |
| 18399 | CWCG | C2C GLOBAL LOGISTICS INC | | | SCAC4 |
| 18400 | CWCH | CATAWESE COACH COMPANY | | | SCAC3 |
