| 1101 | WDIV | WILSON DIVERSIFIED SERVICES | | | SCAC4 |
| 1102 | WDJC | WHELAN, D J & CO INC | | | SCAC4 |
| 1103 | WDJM | WOODS, JIM MARKETING INC | | | SCAC4 |
| 1104 | WDJT | WOOD, JIMMY T INC | | | SCAC4 |
| 1105 | WDK | Oxford Air Services Ltd. | Callsign: Woodstock, Name changed to Capital Air Services Ltd. | GB | AVCODES |
| 1106 | WDK | Capital Air Services Ltd. | Callsign: Woodstock, Name changed from Oxford Air Services Ltd. | GB | AVCODES |
| 1107 | WDK | Oxford Air Services | | | ICAO1 |
| 1108 | WDKC | WOOD TRUCKING CORPORATION | | | SCAC4 |
| 1109 | WDKG | WENDT TRUCKING | | | SCAC4 |
| 1110 | WDKI | WEILAND TRUCKING COMPANY INC | | | SCAC4 |
| 1111 | WDL | WDL Aviation GmbH & Co. KG | IATA: WD, Callsign: WDL, Designator WD recalled by IATA. | D | AVCODES |
| 1112 | WDL | WDL Aviation GmbH & Co. KG | IATA: WH, Callsign: WDL, IATA Prefix: 944, Name changed to German Airways. ICAO designator changed to GER. Designator WD recalled by IATA. | D | AVCODES |
| 1113 | WDL | WDL Aviation | IATA: W1 | | ICAO1 |
| 1114 | WDLC | WATERDALE INC | | | SCAC4 |
| 1115 | WDLH | WADLEIGHS INC | | | SCAC4 |
| 1116 | WDLL | WD LOGISTICS L L C | | | SCAC4 |
| 1117 | WDLM | WILLY DOG LTD | | | SCAC4 |
| 1118 | WDLO | WORLD OIL TOOLS INC | | | SCAC4 |
| 1119 | WDLQ | WHITE DUCKS LTD | | | SCAC4 |
| 1120 | WDLR | WENDLAND TRUCKING | | | SCAC1 |
| 1121 | WDLS | WORLD LOGISTICS SERVICE (USA) INC. | | | SCAC1 |
| 1122 | WDLS | WORLD LOGISTICS SERVICE (USA) INC | | | SCAC4 |
| 1123 | WDLT | WORLD LINK TRANSPORTATION | | | SCAC4 |
| 1124 | WDLX | Waddell Coal Mining Co., Inc. | 1/1952-10/1957; eliminated 4/1958 | | NAKINA |
| 1125 | WDLX | Waddell Coal Mining Co., Inc. | 1/52-10/57 | | NRHS |
| 1126 | WDLX | WADDELL COAL MINING CO., INC. | | | PWRC |
| 1127 | WDLY | WOODIWISS LOG & TIMBER SYSTEMS INC | | | SCAC4 |
| 1128 | WDMA | WIEDMAIER TRUCKS STOP | | | SCAC4 |
| 1129 | WDMG | WAREHOUSE DISTRIBUTION MANAGEMENT | | | SCAC4 |
| 1130 | WDMK | WESTERDALE, D & M TRUCKING INC | | | SCAC4 |
| 1131 | WDML | WESTWOOD MFG LTD | | | SCAC4 |
| 1132 | WDMR | WOODS, MARK | | | SCAC1 |
| 1133 | WDMZ | WEST DECKER MINE | | | PWRC |
| 1134 | WDNG | WELDING AND AUTO SUPPLY INC | | | SCAC4 |
| 1135 | WDNI | WORLDNET INTERNATIONAL | | | SCAC4 |
| 1136 | WDNN | WYDIN INC | | | SCAC4 |
| 1137 | WDNO | WORLDNET TRANSPORTATION / THE MARKI | | | SCAC4 |
| 1138 | WDNQ | WILDERNESS TRANSPORTATION | | | SCAC4 |
| 1139 | WDOC | WADSWORTH OIL COMPANY OF CLANTON IN | | | SCAC4 |
| 1140 | WDOL | WARD OIL COMPANY INC | | | SCAC4 |
| 1141 | WDOR | WHITEWATER DOCKS | | | SCAC4 |
| 1142 | WDPK | WOODLAND PARK | | | SCAC4 |
| 1143 | WDPL | WAYNE-DALTON PORTLAND FLEET | | | SCAC4 |
| 1144 | WDPO | W D POTATO LTD | | | SCAC4 |
| 1145 | WDPT | WOODEN POTTERY | | | SCAC4 |
| 1146 | WDPX | W.D. Pawley | 1/1945 (not listed); 1/1946 | | NAKINA |
| 1147 | WDPX | Gascoyne Materials Handling & Recycling LLC | added 7/2008 | | NAKINA |
| 1148 | WDPX | *W. D. PAWLEY | | | PWRC |
| 1149 | WDPX | +GASCOYNE MATERIALS HANDLING & RECYCLING, LLC | | | PWRC |
| 1150 | WDPX | GASCOYNE MATERIALS HANDLING & RECYC | | | SCAC4 |
| 1151 | WDPY | WILSON, DEIRDRE POTTERY | | | SCAC4 |
| 1152 | WDR | Jetride, Inc. d/b/a Air Net Private Charter | Callsign: Wind Rider, | USA | AVCODES |
| 1153 | WDR | Air Net Private Charter | | | ICAO1 |
| 1154 | WDRF | WOODRUFF ENERGY | | | SCAC4 |
| 1155 | WDRM | WINDSOR BARREL AND DRUM LTD | | | SCAC4 |
| 1156 | WDRN | WILDERNESS IMAGES | | | SCAC4 |
| 1157 | WDRO | WINDSOR MOLD INC | | | SCAC4 |
| 1158 | WDRR | WOOD, ROGER FOODS, INC. | | | SCAC4 |
| 1159 | WDRX | WATER DIVISION RAILROAD OF ST. LOUIS | | | PWRC |
| 1160 | WDRY | WIGGINS, DONALD RAY | | | SCAC4 |
| 1161 | WDS | Four Winds Aviation Ltd. | Callsign: Winds, | USA | AVCODES |
| 1162 | WDS | Four Winds Aviation | | | ICAO1 |
| 1163 | WDS | Wadley Southern Ry. Co. (Wrightsville & Tennille R.R. Co.) | 7/1923-7/1936 | | NAKINA |
| 1164 | WDS | WRIGHTSVILLE & TENNILLE RAILROAD CO. [WADLEY SOUTHERN RWY. CO.] | | | PWRC |
| 1165 | WDS | WINDSTAR LINES INC | | | SCAC4 |
| 1166 | WDSA | WINSTON DATA SA DE CV | | | SCAC4 |
| 1167 | WDSE | WELDER SERIES INC | | | SCAC4 |
| 1168 | WDSH | WDS PARTNERS L P | | | SCAC4 |
| 1169 | WDSI | W D S ENTERPRISES INC | | | SCAC4 |
| 1170 | WDSJ | WAREHOUSING & DISTRIBUTION SPECIALI | | | SCAC4 |
| 1171 | WDSK | WINDELS, S TRUCKING | | | SCAC4 |
| 1172 | WDSL | WOODSTOCK OIL | | | SCAC4 |
| 1173 | WDSP | WOOD SPECIALITIES DE MEXICO SA DE C | | | SCAC4 |
| 1174 | WDSQ | WOODS EQUIPMENT COMPANY | | | SCAC4 |
| 1175 | WDSR | WINDSOR MACHINE & STAMPING (2009) L | | | SCAC4 |
| 1176 | WDSS | WINDSOR TRANSPORTATION SERVICES INC | | | SCAC4 |
| 1177 | WDST | WOODSIDE TRADING CO INC | | | SCAC4 |
| 1178 | WDSU | DEKALB FARMERS MARKET, INC. | | USA | BIC |
| 1179 | WDSX | WATER DIVISION RAILROAD OF ST. LOUIS | | | PWRC |
| 1180 | WDSY | WOODINGTON SYSTEMS INC | | | SCAC4 |
| 1181 | WDTB | WELL DONE TRANSPORTATION INC | | | SCAC4 |
| 1182 | WDTC | WARD TRUCKLOAD EXPRESS LLC | | | SCAC4 |
| 1183 | WDTE | WILLIFORD TRUCKING INCORPORATED OF | | | SCAC4 |
| 1184 | WDTF | WOODRUFF TRUCKING | | | SCAC4 |
| 1185 | WDTG | WILL-DO TRUCKING LLC | | | SCAC4 |
| 1186 | WDTJ | W & D TRANSPORT | | | SCAC4 |
| 1187 | WDTL | WARD TRUCKING | | | SCAC4 |
| 1188 | WDTM | WD TRANSPORT INC | | | SCAC4 |
| 1189 | WDTN | WOOD TRANSPORT | | | SCAC4 |
| 1190 | WDTO | WIEDERHOLT TRANSPORT INC | | | SCAC4 |
| 1191 | WDTP | WARD TRANSPORTATION LLC | | | SCAC4 |
| 1192 | WDTQ | WHIPKEY, DOUG TRUCKING | | | SCAC4 |
| 1193 | WDTR | W & D TRUCK LINES | | | SCAC4 |
| 1194 | WDTT | WHITAKER, DALE TRUCKING LLC | | | SCAC4 |
| 1195 | WDTV | WRIGHT DISTRIBUTION TRANSPORT | | | SCAC4 |
| 1196 | WDTW | WAYNE-DALTON TRANSPORTATION LLC | | | SCAC4 |
| 1197 | WDVL | WARD, DAVE TRUCKING LLC | | | SCAC4 |
| 1198 | WDW | Act Two, Inc. | Callsign: Woodward, | USA | AVCODES |
| 1199 | WDWC | WALKER DOOR & WINDOW INTERNATIONAL | | | SCAC4 |
| 1200 | WDWH | WOODWORTH TRUCKING | | | SCAC4 |
