| 1 | KW | KAS Air Company | ICAO: KSD, Callsign: Aerokas, | KS | AVCODES |
| 2 | KW | Kas Air Company | ICAO: KSK, | KZ | AVCODES |
| 3 | KW | Carnival Air Lines | ICAO: CAA, Merged into Pan American World Airways, Inc. | USA | AVCODES |
| 4 | KW | Pan American World Airways, Inc. | Designator KW recalled by IATA | USA | AVCODES |
| 5 | KW | Kelowna Flightcraft Air Charter Ltd. | ICAO: KFA, Callsign: Flightcraft, IATA Prefix: 194, IATA designator changed to FK. Designator KW* reinstated by IATA | CDN | AVCODES |
| 6 | KW | Colombia | ICAO: CLA, Callsign: Columbia, | I | AVCODES |
| 7 | KW | Kuwait National Airways (K.C.S.) | ICAO: KNA, Name changed to Wataniya Airways | KWT | AVCODES |
| 8 | KW | Kuwait National Airways (K.C.S.) t/a Wataniya Airways | ICAO: WAN, Callsign: Wataniya, IATA Prefix: 100, Ceased operations on 16 March 2011. Name changed from Kuwait National Airways | KWT | AVCODES |
| 9 | KW | Public JSC Kharkiv Airlines | ICAO: KHK, Callsign: Sunray, Ceased operation in March 2015. Designator KW recalled by IATA. IATA dsignator changed from KT | UA | AVCODES |
| 10 | KW | Korea Express Air Co., Ltd. | ICAO: KEA, Callsign: Korea Express, IATA designator changed from XE*. Commenced opeations on 15 August 2009. | ROK | AVCODES |
| 11 | KW | AeroStan Aircompany | ICAO: BSC, Callsign: Big Shot, IATA Prefix: 321, | KS | AVCODES |
| 12 | KWA | Vozdushnaya Academy, LLP | Callsign: Vozair, | KZ | AVCODES |
| 13 | KWA | Pison Airways Limited | IATA: 3I, Callsign: Akwaaba Air, Ceased operations. | GH | AVCODES |
| 14 | KWA | Vozdushnaya Academy | | | ICAO1 |
| 15 | KWAC | KWA INC | | | SCAC4 |
| 16 | KWAI | KELLY, WM A INC | | | SCAC3 |
| 17 | KWAI | KIOWA INTERNATIONAL INC | | | SCAC4 |
| 18 | KWAL | KOWALSKI DISTRIBUTING COMPANY INC | | | SCAC3 |
| 19 | KWAN | KWAN, PHILIP TRUCKING INC | | | SCAC4 |
| 20 | KWAO | KUWAIT OIL TANKER COMPANY S A K | | | SCAC3 |
| 21 | KWAS | KAWAS ZARZAR, ROBERTO JOSE | | | SCAC4 |
| 22 | KWAT | KINGSWAY AUTO TRANSPORT | | | SCAC3 |
| 23 | KWAT | KWS TRUCKING | | | SCAC4 |
| 24 | KWAY | K-WAY EXPRESS INC | | | SCAC3 |
| 25 | KWAY | K-WAY EXPRESS INC | | | SCAC4 |
| 26 | KWB | PAK Kopalnia Węgla Brunatnego Konin S.A. | | PL | VKM |
| 27 | KWBS | KRICK, MIKE WHOLESALE BUILDING SUPP | | | SCAC3 |
| 28 | KWBS | KELLOGG WHOLESALE BUILDING SUPPLY I | | | SCAC4 |
| 29 | KWC | Kopalnia Wapienia “Czatkowice | | PL | VKM |
| 30 | KWCD | KELLER, WALTER C DIST INC | | | SCAC4 |
| 31 | KWCI | KOWABUNGA CRANES INC. | | | PWRC |
| 32 | KWCI | KOWABUNGA CRANES INC | | | SCAC3 |
| 33 | KWCI | KAPS WHOLESALE FOOD SERVICE INC | | | SCAC4 |
| 34 | KWCK | KERWICK TRUCKING | | | SCAC4 |
| 35 | KWCL | KING WARD COACH LINES | | | SCAC3 |
| 36 | KWCL | KING WARD COACH LINES (DIV OF TERRI | | | SCAC4 |
| 37 | KWCN | KW CARTAGE INC | | | SCAC4 |
| 38 | KWCO | KENSTON WAREHOUSING CORP | | | SCAC3 |
| 39 | KWCQ | KEN WAREHOUSE CARTAGE | | | SCAC3 |
| 40 | KWCQ | KWC TRUCK LINES | | | SCAC4 |
| 41 | KWCT | KOBYS WITCH CITY EXPRESS INC | | | SCAC3 |
| 42 | KWCU | WORLD CONTAINER LEASING INC. | | | PWRC |
| 43 | KWCU | World Container Leasing (Textainer) | | | RSRV |
| 44 | KWDC | KANE WAREHOUSE AND DISTRIBUTION COM | | | SCAC3 |
| 45 | KWDG | KEN WAY DRAYAGE | | | SCAC3 |
| 46 | KWDI | KASTLEWOOD INC | | | SCAC3 |
| 47 | KWDI | KASTLEWOOD INC | | | SCAC4 |
| 48 | KWDK | KINGWORLD TRUCKLINE | | | SCAC4 |
| 49 | KWDL | K W D LIMITED | | | SCAC3 |
| 50 | KWDQ | KWIK DELIVERY | | | SCAC3 |
| 51 | KWDS | KWIK DELIVERY SYSTEMS | | | SCAC3 |
| 52 | KWDT | KWICK & DEPENDABLE TRANSPORTATION C | | | SCAC4 |
| 53 | KWDW | KINWOOD WAREHOUSE SYSTEMS & TRANSPO | | | SCAC3 |
| 54 | KWE | Kleinbahn Wathlingen-Ehlershausen e.V | | DE | VKM |
| 55 | KWEA | KINTETSU WORLD EXPRESS (AUSTRALIA) | | | SCAC4 |
| 56 | KWEK | KINTETSU WORLD EXPRESS (UK) LIMITED | | | SCAC4 |
| 57 | KWEM | KEY WEST EXPRESS LTD | | | SCAC4 |
| 58 | KWEN | KINTETSU WORLD EXPRESS (USA) INC | | | SCAC4 |
| 59 | KWEO | KINTETSU WORLD EXPRESS INC | | | SCAC4 |
| 60 | KWES | KWESVA INC | | | SCAC3 |
| 61 | KWEST | Key West Transit | | USA | TRAFFIC |
| 62 | KWEY | KINGS WAY EXPRESS INC | | | SCAC4 |
| 63 | KWFC | KEY WEST FERRY CORPORATION | | | SCAC3 |
| 64 | KWFI | K W FUELS INC | | | SCAC4 |
| 65 | KWFL | K & W FREIGHT LINES INC | | | SCAC3 |
| 66 | KWG | Kreiswerke Gelnhausen (Wächtersbach - Bad Orb) | | D | TRAFFIC |
| 67 | KWGA | KWG TRANSPORT | | | SCAC4 |
| 68 | KWH | Kreiswerke Heinsberg | City: Geilenkirchen | D | TRAFFIC |
| 69 | KWHD | KOCHER, W H DRAYAGE CO INC | | | SCAC3 |
| 70 | KWHI | KENT, W. H | | | SCAC3 |
| 71 | KWHO | KIRKWOOD HEATING OIL CO INC | | | SCAC4 |
| 72 | KWHQ | KEARNEY, WALTER H | | | SCAC3 |
| 73 | KWIC | KATALYST WORLDWIDE INC | | | SCAC4 |
| 74 | KWIK | KWIK-TRUK DELIVERY SERVICE | | | SCAC3 |
| 75 | KWIQ | KEYPORT WAREHOUSING INC | | | SCAC4 |
| 76 | KWIS | KW INTERNATIONAL SERVICES CORP | | | SCAC4 |
| 77 | KWIT | K & W INTERNATIONAL INC | | | SCAC4 |
| 78 | KWJ | KLEINS BUS SERVICE INC | | | SCAC4 |
| 79 | KWKA | KWIKASAIR COMET | | | SCAC3 |
| 80 | KWKE | KWIK EXPRESS INC | | | SCAC3 |
| 81 | KWKG | KWIK TRUCKING | | | SCAC4 |
| 82 | KWKI | KUWAYE TRUCKING INCORPORATED | | | SCAC4 |
| 83 | KWKK | KWICK KARRIERS INC | | | SCAC3 |
| 84 | KWKM | KWIKME | | | SCAC4 |
| 85 | KWKO | KWIKOOL INC AND COLD STORAGE INC | | | SCAC3 |
| 86 | KWKS | KITTIWAKE SHIPPING LLC | | | SCAC4 |
| 87 | KWKU | KWIK EQUIPMENT SALES LLC | | USA | BIC |
| 88 | KWKW | KWIK WAREHOUSE AND DISTRIBUTION INC | | | SCAC3 |
| 89 | KWLC | K & W LOGISTICS INC | | | SCAC4 |
| 90 | KWLI | KWL INC | | | SCAC4 |
| 91 | KWLM | KOWALSKI, MIKE TRUCKING INC | | | SCAC3 |
| 92 | KWLP | KAUWELL, PATRICK | | | SCAC4 |
| 93 | KWLS | KNOWLES, KENNIE C TRUCKING INC | | | SCAC3 |
| 94 | KWMA | K W MARINE | | | SCAC3 |
| 95 | KWME | KOWALSKI, MICHAEL K INC | | | SCAC3 |
| 96 | KWML | K-W MESSENGER SERVICE LTD | | | SCAC3 |
| 97 | KWMS | K W M SERVICE CO | | | SCAC3 |
| 98 | KWMT | KENNEDY, W M TRUCKING | | | SCAC3 |
| 99 | KWMU | UNITAINER | | | SCAC4 |
| 100 | KWN | Kwena Air, South African Charter | Callsign: Kwena, | ZA | AVCODES |
