| 1 | WW | Whyalla Airlines Pty. Ltd. | ICAO: WWL, Designator WW* recalled by IATA | AUS | AVCODES |
| 2 | WW | Scottish European Airways Ltd. | ICAO: SEU, Callsign: Clanspeed, Suspended operations on 03 April 1990. | GB | AVCODES |
| 3 | WW | bmibaby Limited | ICAO: BMI, Callsign: Baby, Ceased Operation 09 September 2012. Name changed from British Midland Regional Ltd. d/b/a bmi Regional. Low cost subsidary of bmi British Midland. Designator WW reinstated by IATA. | GB | AVCODES |
| 4 | WW | Westwing A/S | Callsign: Westwing, Designator WW recalled by IATA | N | AVCODES |
| 5 | WW | Wow Air ehf | ICAO: WOW, Callsign: Wowair, IATA Prefix: 377, Ceased operations on 28 March 2019. | IS | AVCODES |
| 6 | WW | M Jets International Sdn Bhd t/a Love Fly | ICAO: LUV, Callsign: Lovejet, Name changed to M Jets International Sdn Bhd t/a Kargo Xpress. | MAL | AVCODES |
| 7 | WW | M Jets International Sdn Bhd t/a Kargo Xpress | ICAO: KXP, Callsign: Xpress Kargo, IATA Prefix: 313, Name changed from M Jets International Sdn Bhd t/a Love Fly. | MAL | AVCODES |
| 8 | WW | Winchester and Western R.R. Co. | 1/1975; added 4/1979; 1/1980-7/2005 | | NAKINA |
| 9 | WW | Winchester and Western R.R. Co. | 1/75; added 4/79; 1/80-7/2000 | | NRHS |
| 10 | WW | WINCHESTER & WESTERN RAILROAD CO. | | | PWRC |
| 11 | WW | Winchester and Western Railroad | | | RSRV |
| 12 | WW | WINCHESTER AND WESTERN RAILROAD COM | | | SCAC4 |
| 13 | WW | Winchester and Western R.R. Co. | | USA | TRAFFIC |
| 14 | WW | Willke rail construction GmbH & Co. KG | | DE | VKM |
| 15 | WWA | Worldwide Aviation Services Ltd. | Callsign: Wasa, | YV | AVCODES |
| 16 | WWA | Aztec Worldwide Airlines, Inc. | IATA: AJ, Callsign: Aztec World, IATA Prefix: 179, ICAO designator changed to AZY. Name changed from Piper Aztec Inc, d/b/a Aztec Airways. Designator changed from 7A* | USA | AVCODES |
| 17 | WWA | Westwind Aviation Ltd. (Kenya) | Callsign: Wilken Air, | EAK | AVCODES |
| 18 | WWAI | WESTWARD AUTO INC | | | SCAC4 |
| 19 | WWAL | WESTMOUNT MOVING & WAREHOUSING | | | SCAC4 |
| 20 | WWAQ | WORLD WAREHOUSE & DISTRIBUTION INC | | | SCAC4 |
| 21 | WWAT | WATKINS MOTOR LINES, INC | | | SCAC1 |
| 22 | WWAT | WATKINS MOTOR LINES INC | | | SCAC4 |
| 23 | WWBI | WINDSOR WHOLESALE BAIT | | | SCAC4 |
| 24 | WWBX | W.W. Butler, Inc. (cars no. 100-104) (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 25 | WWBX | W.W. Butler, Inc. (cars no. 500-604) (American Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 26 | WWBX | WWIB Transportation Services | 1/1994-7/2005 (not listed) | | NAKINA |
| 27 | WWBX | WWIB Transportation Services | 1/94-7/2000 | | NRHS |
| 28 | WWBX | *WWIB TRANSPORTATION SERVICES | | | PWRC |
| 29 | WWBX | +RAIL SCALE, INC. | | | PWRC |
| 30 | WWBX | WWIB Transportation Services | | | RSRV |
| 31 | WWBX | RAIL SCALE INC | | | SCAC4 |
| 32 | WWC | Worldways Canada Ltd. | IATA: WG, Callsign: Worldways Canada, Ceased operations | CDN | AVCODES |
| 33 | WWC | WHITE WESTINGHOUSE CO. | | | PWRC |
| 34 | WWCD | WINDWAY CARRIER INC | | | SCAC4 |
| 35 | WWCF | WIDEWORLD CONSOLIDATORS INC | | | SCAC4 |
| 36 | WWCI | WORLDWIDE CARRIERS LTD | | | SCAC4 |
| 37 | WWCO | WORLD WIDE CARGO PARTNERS LLC | | | SCAC4 |
| 38 | WWCT | WESTWOOD CUSTOM WINDOWS & DOORS LTD | | | SCAC4 |
| 39 | WWCY | WARD-WILLISTON COMPANY | | | SCAC4 |
| 40 | WWD | Westward Airways, Inc. | IATA: CN, Callsign: Westward, Established in 2002 and started operations on 01 June 2004. Ceased operations on 25 July 2005. | USA | AVCODES |
| 41 | WWD | Westward Airways | IATA: CN | | ICAO1 |
| 42 | WWDD | WILDWOOD EXPRESS | | | SCAC4 |
| 43 | WWDF | WITHERS WORLDWIDE FORWARDERS INC | | | SCAC4 |
| 44 | WWDI | WILLWOOD INDUSTRIES | | | SCAC4 |
| 45 | WWDO | WORLDWIDE ORCHIDS INC | | | SCAC4 |
| 46 | WWDP | WESTLOCK WASTE DISPOSAL LTD | | | SCAC4 |
| 47 | WWDT | WORLDWIDE TRADE LOGISTICS INC | | | SCAC4 |
| 48 | WWDV | WORLDWIDE DEDICATED SERVICES INC | | | SCAC4 |
| 49 | WWDW | WESTECK WINDOWS MFG INC | | | SCAC4 |
| 50 | WWDX | Wescott and Winks Dairy Despatch | 7/1932 | | NAKINA |
| 51 | WWDX | Wescott and Winks Dairy Despatch (North American Car Corp.) | 7/1935 | | NAKINA |
| 52 | WWDX | WESCOTT & WINKS DAIRY DESPATCH | | | PWRC |
| 53 | WWDY | WENDY'S WAY | | | SCAC4 |
| 54 | WWEB | WOLLENWEBERS TRUCKING CO | | | SCAC4 |
| 55 | WWEC | WHIRL WIND EXPRESS INC | | | SCAC4 |
| 56 | WWEE | WEBSTER, W TRUCKING LTD | | | SCAC4 |
| 57 | WWEQ | WORLDWIDE EXPRESS INC | | | SCAC4 |
| 58 | WWER | WILES, WYLIE R | | | SCAC4 |
| 59 | WWEX | Wood Waste Energy, Inc. | added 10/1998; eliminated 4/2000 | | NAKINA |
| 60 | WWEX | Railworks Wood Waste Energy, Inc. | added 4/2000; 7/2000; eliminated 7/2002; 7/2005 (not listed) | | NAKINA |
| 61 | WWEX | Wood Waste Energy, Inc. | added 10/98; eliminated 4/2000 | | NRHS |
| 62 | WWEX | Railworks Wood Waste Energy, Inc. | added 4/2000; 7/2000 | | NRHS |
| 63 | WWEX | RAILWORKS WOOD WASTE ENERGY INCORPORATED | | | PWRC |
| 64 | WWEX | Railworks Wood Waste Energy | | | RSRV |
| 65 | WWFC | WORLD WIDE FREIGHT CORPORATION | | | SCAC4 |
| 66 | WWFF | WORLDWIDE FREIGHT FORWARDERS INC (A | | | SCAC4 |
| 67 | WWFI | WORLDWIDE FREIGHT FORWARDERS INC | | | SCAC4 |
| 68 | WWFL | WINSLOW, VICTOR A & SONS FLAGSTONE | | | SCAC4 |
| 69 | WWFS | WORLD WIDE FREIGHT SYSTEMS INC | | | SCAC4 |
| 70 | WWG | Aereo WWG, S.A. de C.V. | Callsign: Aero-W, | MEX | AVCODES |
| 71 | WWG | Weichenwerk Wörth GmbH | | AT | VKM |
| 72 | WWGA | WALLA WALLA GARDENERS ASSN INC | | | SCAC4 |
| 73 | WWGC | WORLD WIDE LOGISTICS GROUP CORP | | | SCAC4 |
| 74 | WWGN | WORLD WIDE TRAVEL OF GREATER NEW YO | | | SCAC4 |
| 75 | WWGS | WATER WORKS GARDEN SCULPTURE | | | SCAC4 |
| 76 | WWHF | WORLD WIDE HOSPITALITY FURNITURE | | | SCAC4 |
| 77 | WWHH | WORLDWIDE HEAVYHAUL LLC | | | SCAC4 |
| 78 | WWHS | WELLWOOD, H & SONS LTD | | | SCAC4 |
| 79 | WWI | Worldwide Jet Charter LLC | IATA: T8, Callsign: Worldwide, Designator T8* recalled by IATA | USA | AVCODES |
| 80 | WWI | Worldwide Jet Charter LLC | Callsign: Worldwide, Designator T8* recalled by IATA | USA | AVCODES |
| 81 | WWI | Worldwide Jet Charter | | | ICAO1 |
| 82 | WWIB | RETIRED 05-15-92 ATP (0868) | | | PWRC |
| 83 | WWID | WORLDWIDE TRANSPORTATION INC | | | SCAC4 |
| 84 | WWIK | WINDWALKER TRANSPORTATION INC | | | SCAC4 |
| 85 | WWIN | WESTWIND LOGISTICS LLC | | | SCAC4 |
| 86 | WWIT | WORLD WAY INTERNATIONAL INC | | | SCAC4 |
| 87 | WWIV | WESTAWAY INVESTMENTS LTD | | | SCAC4 |
| 88 | WWJF | WHITE, WILFRED J | | | SCAC4 |
| 89 | WWJS | WEIR, W J & SONS | | | SCAC4 |
| 90 | WWKE | WARWICK ENTERPRISES INC | | | SCAC4 |
| 91 | WWKT | WARWICK TRANSPORT INC | | | SCAC4 |
| 92 | WWKV | WORLD WIDE KILN SERVICE INC | | | SCAC4 |
| 93 | WWL | Whyalla Airlines Pty. Ltd. | IATA: WW, Designator WW* recalled by IATA | AUS | AVCODES |
| 94 | WWL | Whyalla Airlines Pty. Ltd. | Designator WW* recalled by IATA. Ceased operations in August 2000 | AUS | AVCODES |
| 95 | WWL | Whyalla Airlines | | | ICAO1 |
| 96 | WWLA | WILDON WIRING LIMITED | | | SCAC4 |
| 97 | WWLB | WESTERN WOOD LLC | | | SCAC4 |
| 98 | WWLD | WEST WIND LOGISTICS INC | | | SCAC4 |
| 99 | WWLG | WORLDWIDE LOGISTICS | | | SCAC4 |
| 100 | WWLH | WESTON WORLDWIDE LOGISTICS INC | | | SCAC4 |
