| 3201 | WNFR | Winifrede R.R. Co. | 1/75-1/80; added 7/80; 1/94-7/2000; eliminated 10/2000 | | NRHS |
| 3202 | WNFR | Kanawha Rail Corp. | added 10/2000 | | NRHS |
| 3203 | WNFR | KANAWHA RAIL CORP. [WINIFREDE RAILROAD CO.] | | | PWRC |
| 3204 | WNFR | Winnifrede Railroad | | | RSRV |
| 3205 | WNFR | KANAWHA RAIL CORP | | | SCAC4 |
| 3206 | WNG | Wing Airways (Pty) Ltd. | Callsign: Wing Air, | ZA | AVCODES |
| 3207 | WNGB | WING BRIDGE SHIPPING COMPANY | | | SCAC1 |
| 3208 | WNGB | WING BRIDGE SHIPPING CO | | | SCAC4 |
| 3209 | WNGC | WINGARD, CARL INC | | | SCAC4 |
| 3210 | WNGE | WHITE NIGHT EXPRESS | | | SCAC4 |
| 3211 | WNGG | WINGS TRUCKING COMPANY INC | | | SCAC4 |
| 3212 | WNGR | WENGER CORPORATION, THE | | | SCAC4 |
| 3213 | WNGT | WINGS BROKERAGE INC | | | SCAC4 |
| 3214 | WNGU | WNG CONTAINER SERVICE CO LIMITED | | PRC | BIC |
| 3215 | WNGW | WINGS WORLDWIDE LLC | | | SCAC4 |
| 3216 | WNGX | Western Natural Gas Co. | added 4/1975; 1/1980-1/1994; eliminated 10/1996; 7/2000-7/2005 (not listed) | | NAKINA |
| 3217 | WNGX | Western Natural Gas Co. | added 4/75; 1/80-1/94; eliminated 10/96; 7/2000 | | NRHS |
| 3218 | WNGX | WESTERN NATURAL GAS CO. | | | PWRC |
| 3219 | WNGX | Western Natural Gas | | | RSRV |
| 3220 | WNGX | WESTERN NATURAL GAS CO. | | | SCAC4 |
| 3221 | WNI | Weathernews, Inc. | | J | AVCODES |
| 3222 | WNIB | WESTERBERG, NELSON INTERNATIONAL IN | | | SCAC4 |
| 3223 | WNJN | WINJEAN TRUCKING CO INC | | | SCAC4 |
| 3224 | WNKC | WINKLER CANVAS LTD | | | SCAC4 |
| 3225 | WNKH | WILSON TRUCKING LLC | | | SCAC4 |
| 3226 | WNKN | WESTERN TRUCKING INC | | | SCAC4 |
| 3227 | WNKQ | WAYNE TRUCKING CORP INC | | | SCAC4 |
| 3228 | WNKR | WINKLER TRUCKING INC | | | SCAC4 |
| 3229 | WNLA | WABASH NATIONAL LP | | | SCAC4 |
| 3230 | WNLC | WORDEN LLC | | | SCAC4 |
| 3231 | WNLI | WESTERN LOGISTICS INC | | | SCAC4 |
| 3232 | WNLT | WNL TRANSPORTATION LLC | | | SCAC4 |
| 3233 | WNLY | WILSON, NANCEE L | | | SCAC4 |
| 3234 | WNO | WARTON & NORTHERN RR | | | PWRC |
| 3235 | WNON | WINSTON TRANSPORTATION SERVICES INC | | | SCAC4 |
| 3236 | WNPD | WEN-PARKER LOGISTICS INC | | | SCAC4 |
| 3237 | WNR | Wondair On Demand Aviation S.L. | Callsign: Wondair, | E | AVCODES |
| 3238 | WNR | Wondair on Demand Aviation | | | ICAO1 |
| 3239 | WNR | WHARTON & NORTHERN RAILROAD CO. | | | PWRC |
| 3240 | WNRE | WARNER EXPRESS INC | | | SCAC4 |
| 3241 | WNRL | WHARTON & NORTHERN RAILROAD CO. | | | PWRC |
| 3242 | WNRL | WILSON NRL TRANSPORT GMBH | | | SCAC4 |
| 3243 | WNRP | WARNERS PROPANE AND OIL | | | SCAC4 |
| 3244 | WNRR | WARNER, RICHARD | | | SCAC4 |
| 3245 | WNSB | WINNSBORO PETROLEUM CO | | | SCAC4 |
| 3246 | WNSE | WATSON, SCOTT ROBERT | | | SCAC4 |
| 3247 | WNSI | WEAVER, NELSON & SON INC | | | SCAC4 |
| 3248 | WNSK | WALSH & SONS TRUCKING CO LTD | | | SCAC4 |
| 3249 | WNSP | WINDSPEC INC | | | SCAC4 |
| 3250 | WNSR | WINDSOR SERVICE TRUCKING CORP | | | SCAC4 |
| 3251 | WNSS | WESTBURY NATIONAL SHOW SYSTEMS LTD | | | SCAC4 |
| 3252 | WNT | Winnport Logistics Ltd. | IATA: W8, Callsign: Winnport, IATA Prefix: 489, Name changed to Cargojet Airways Ltd. Name changed to Kelowna Flightcraft International Air Cargo Ltd. | CDN | AVCODES |
| 3253 | WNT | Cargojet Airways Ltd. | IATA: W8, Callsign: Winnport, Name changed from Winnport Logistics Ltd. ICAO Code changed to CJT. ICAO callsign changed to Cargojet. Name changed to Kelowna Flightcraft International Air Cargo Ltd. | CDN | AVCODES |
| 3254 | WNTB | WARNER TRANSPORT COMPANY | | | SCAC1 |
| 3255 | WNTB | WARNER TRANSPORT COMPANY | | | SCAC4 |
| 3256 | WNTD | WIN TRANSPORT INC | | | SCAC4 |
| 3257 | WNTG | WINTERS TRUCKING INC | | | SCAC4 |
| 3258 | WNTI | WALTON ENTERPRISE INC | | | SCAC4 |
| 3259 | WNTJ | WINTERS MOVERS | | | SCAC4 |
| 3260 | WNTK | WIN-TRAK TRUCKING | | | SCAC4 |
| 3261 | WNTO | WARNER TRANSPORT LLC | | | SCAC4 |
| 3262 | WNTP | WINTANA EXPRESS | | | SCAC4 |
| 3263 | WNTQ | WHEATONS TRANSPORT INC | | | SCAC4 |
| 3264 | WNTS | WINSHIP TRANSPORTATION | | | SCAC4 |
| 3265 | WNTT | WARREN TRANSPORT INC | | | SCAC1 |
| 3266 | WNTT | WARREN TRANSPORT, INC | | | SCAC4 |
| 3267 | WNTW | WHITE NIGHTS TRUCKING INC | | | SCAC4 |
| 3268 | WNTY | WARREN, TONY TRUCKING | | | SCAC4 |
| 3269 | WNUA | WNUK TRANSPORT | | | SCAC4 |
| 3270 | WNV | Wichita Northwestern Ry. | Jan-52 | | NRHS |
| 3271 | WNVC | WESTERN SERVICE INC | | | SCAC4 |
| 3272 | WNVO | WWLP INC | | | SCAC4 |
| 3273 | WNW | Wichita Northwestern Ry. | 7/1935-7/1954 | | NAKINA |
| 3274 | WNW | Wichita Northwestern Ry. | Apr-38 | | NRHS |
| 3275 | WNW | WICHITA NORTHWESTERN RWY. | | | PWRC |
| 3276 | WNWI | WINWIN LOGISTICS INC | | | SCAC4 |
| 3277 | WNWR | WINE WAREHOUSE | | | SCAC4 |
| 3278 | WNXA | WILSON TRANSPORTATION | | | SCAC4 |
| 3279 | WNXC | WELBORN TRANSPORTATION CORPORATION | | | SCAC4 |
| 3280 | WNXG | WESTERN TRANS LOGISTICS CO | | | SCAC4 |
| 3281 | WNXL | WESTERN TRANSPORTATION LLC | | | SCAC4 |
| 3282 | WNYL | WNY TRUCKING LLC | | | SCAC4 |
| 3283 | WNYP | Western New York & Pennsylvania R.R. LLC | added 10/2001; eliminated 1/2004; 7/2005 | | NAKINA |
| 3284 | WNYP | WESTERN NEW YORK & PENNSYLVANIA RAILROAD LLC | | | PWRC |
| 3285 | WNYP | Western New York and Pennsylvania Railroad | | | RSRV |
| 3286 | WNYP | WESTERN NEW YORK & | | | SCAC4 |
| 3287 | WNYP | Western New York & Pennsylvania | | USA | TRAFFIC |
| 3288 | WNYS | WHITNEY, STEPHEN | | | SCAC4 |
| 3289 | WNYU | TRANSGAS | | RUS | BIC |
| 3290 | WNYX | Western New York Ry. Historical Society | 1/1994-7/2005 (not listed) | | NAKINA |
| 3291 | WNYX | Western New York Ry. Historical Society | 1/94-7/2000 | | NRHS |
| 3292 | WNYX | WESTERN NEW YORK RAILWAY HISTORICAL SOCIETY, INC. | | | PWRC |
| 3293 | WNYX | Western New York Railway Historical Society | | | RSRV |
| 3294 | WNYX | WESTERN NEW YORK RAILWAY HISTORICAL | | | SCAC4 |
| 3295 | WNZF | WENZLER FARMS | | | SCAC4 |
| 3296 | WO | World Airways, Inc. | ICAO: WOA, Callsign: World, IATA Prefix: 468, Founded on 29 March 1948. Ceased operations on 27 March 2014. Designator WO reinstated by IATA | USA | AVCODES |
| 3297 | WO | World Airways, Inc. | ICAO: WOA, Callsign: World Airways, IATA Prefix: 468, Founded on 29 March 1948. | USA | AVCODES |
| 3298 | WO | Swoop, Inc | ICAO: WSW, Callsign: Swoop, IATA Prefix: 995, Ulta LCC subsidary of WestJet. Planned startup 20 June 2018 with Y189 B737-800. | CDN | AVCODES |
| 3299 | WOA | World Airways, Inc. | IATA: WO, Callsign: World, IATA Prefix: 468, Founded on 29 March 1948. Ceased operations on 27 March 2014. Designator WO reinstated by IATA | USA | AVCODES |
| 3300 | WOA | World Airways, Inc. | IATA: WO, Callsign: World Airways, IATA Prefix: 468, Founded on 29 March 1948. | USA | AVCODES |
