| 1 | SW | Air Namibia | ICAO: NMB, Callsign: Namibia, IATA Prefix: 186, Ceased operation on 11 February 2021. | NAM | AVCODES |
| 2 | SW | South West Air Transport (pty) Ltd. | Callsign: Sow West, | ZA | AVCODES |
| 3 | SW | Swiss Airtainer SA | Non-airlines United Load Devices (ULD) Company. | CH | AVCODES |
| 4 | SW | Southwestern R.R. Co. Inc. | added 1/1991; 1/1994-7/2005 | | NAKINA |
| 5 | SW | Southwestern R.R. Co. Inc. | added 1/91; 1/94-7/2000 | | NRHS |
| 6 | SW | SOUTHWESTERN RAILROAD CO., INC. | | | PWRC |
| 7 | SW | Southwestern Railroad | | | RSRV |
| 8 | SW | SOUTHWESTERN RAILROAD COMPANY INC | | | SCAC4 |
| 9 | SW | Swissair | | CH | TRAFFIC |
| 10 | SW | South West Trains | | UK | VKM |
| 11 | SWA | Southwest Airlines Co. | IATA: WN, Callsign: Southwest, IATA Prefix: 526, | USA | AVCODES |
| 12 | SWA | Southwest Airlines | IATA: WN | | ICAO1 |
| 13 | SWA | | City: Augsburg | D | TRAFFIC |
| 14 | SWA | Stadtwerke Andernach GmbH | | DE | VKM |
| 15 | SWAA | SCHWING AMERICA INC | | | SCAC4 |
| 16 | SWAD | SWD TRANSPORT INC | | | SCAC4 |
| 17 | SWAF | STENA WECO A/S | | | SCAC4 |
| 18 | SWAF | Swedish Air Force | | S | TRAFFIC |
| 19 | SWAH | SUPER THIN SAWS INC | | | SCAC4 |
| 20 | SWAI | SOUTHERN PLAINS CO-OP AT LEWIS KS | | | SCAC4 |
| 21 | SWAJ | SWANTON, J FUEL OIL CO INC | | | SCAC4 |
| 22 | SWAL | SIERRA WEST AIRLINES | | | SCAC4 |
| 23 | SWAM | SAVEWAY PETROLEUM INC | | | SCAC4 |
| 24 | SWANG | Swan Gold Tours | | AUS | TRAFFIC |
| 25 | SWAQ | SEWA ENTERPRISES LTD | | | SCAC4 |
| 26 | SWAR | STEWART EXPRESS LTD | | | SCAC4 |
| 27 | SWAR | Star Wars | | | TRAFFIC |
| 28 | SWAV | SWIFT AIR LOGISTICS LLC | | | SCAC4 |
| 29 | SWAY | SEAWAY COMPANY OF CATALINA | | | SCAC4 |
| 30 | SWB | Swissboogie Parapro SA | Callsign: Swissboogie, | CH | AVCODES |
| 31 | SWB | Swissboogie Parapro | | | ICAO1 |
| 32 | SWB | Schwäbische Waldbahn GmbH | Welzheim | D | privat-bahn.de |
| 33 | SWB | Stockholm - Västerås - Bergslagens Järnvägar | 1875 - 1944 | S | svenska-lok.se |
| 34 | SWB | Stadtwerke Bonn GmbH | City: Bonn | D | TRAFFIC |
| 35 | SWBC | SCHWAB & COMPANY | | | SCAC4 |
| 36 | SWBD | SEA WISE MARINE 2001 INC | | | SCAC4 |
| 37 | SWBE | STAGE WEST EXPRESS INC | | | SCAC4 |
| 38 | SWBF | S W T S | | | SCAC4 |
| 39 | SWBI | SWARTZENTRUBER ENTERPRISES INC | | | SCAC4 |
| 40 | SWBL | SOUTHWOLD B AND L LESSORS INC | | | SCAC4 |
| 41 | SWBO | STEWART, R B PETROLEUM PRODUCTS INC | | | SCAC4 |
| 42 | SWBP | SUMMER WIND TRUCKING | | | SCAC4 |
| 43 | SWBS | Stockholm - Västerås - Bergslagens Järnvägar | Real: SWB, 1875 - 1944 | S | TRAFFIC |
| 44 | SWBT | STEWART, BRAD TRUCKING | | | SCAC4 |
| 45 | SWBW | SWANSON BARK & WOOD PRODUCTS INC | | | SCAC4 |
| 46 | SWC | South West Air Ltd. | Callsign: Saint Clair, Founded in 1983. Ceased operations during 2005. | CDN | AVCODES |
| 47 | SWC | Heliair Sweden AB | Callsign: Swedcopter, | S | AVCODES |
| 48 | SWC | South West Air | | | ICAO1 |
| 49 | SWCA | SOUTHWESTERN CARRIERS, INC. | | | SCAC1 |
| 50 | SWCA | SOUTHWESTERN CARRIERS INC | | | SCAC4 |
| 51 | SWCB | SOUTHWEST CONCRETE & CONST LTD | | | SCAC4 |
| 52 | SWCC | SOUTHWEST CONVENIENCE STORES LLC | | | SCAC4 |
| 53 | SWCE | SWANSON, CHUCK, INC | | | SCAC1 |
| 54 | SWCE | SWANSON, CHUCK INC | | | SCAC4 |
| 55 | SWCH | STEHOUWER FROZEN FOODS INC | | | SCAC4 |
| 56 | SWCI | SOUTHWEST CONNECTION INC | | | SCAC4 |
| 57 | SWCK | SWEITZER TRUCKING LLC | | | SCAC4 |
| 58 | SWCL | SOUTHWAY CARRIERS INC | | | SCAC4 |
| 59 | SWCO | SELL, WAYNE W CORPORATION | | | SCAC4 |
| 60 | SWCQ | SWIFT CANOE & KAYAK | | | SCAC4 |
| 61 | SWCR | SEWELL, ROGER | | | SCAC4 |
| 62 | SWCT | SWIFT CONSTRUCTION COMPANY INC | | | SCAC4 |
| 63 | SWCT | Swiss Classic Train | | CH | TRAFFIC |
| 64 | SWCU | SWISSCONTAINER AG | | CH | BIC |
| 65 | SWCV | SWC TRUCKING | | | SCAC4 |
| 66 | SWCW | SWAN CREW BOATS INC | | | SCAC4 |
| 67 | SWCX | The Sherwin-Williams Co. of Canada, Ltd. | 7/1937-4/1961; eliminated 7/1964 | | NAKINA |
| 68 | SWCX | Swift Chemical Co. | added 1/1974; 1/1975; eliminated 10/1975 | | NAKINA |
| 69 | SWCX | Swift Agricultural Chemicals Corp. | added 10/1975; 1/1980; eliminated 7/1980 | | NAKINA |
| 70 | SWCX | Estech General Chemicals Corp. | added 7/1980; eliminated 10/1981 | | NAKINA |
| 71 | SWCX | Estech, Inc. | added 10/1981; eliminated 1/1985 | | NAKINA |
| 72 | SWCX | The Sherwin-Williams Co. of Canada, Ltd. | 4/38-4/61; eliminated 7/64 | | NRHS |
| 73 | SWCX | Swift Chemical Co. | added 1/74; 1/75 | | NRHS |
| 74 | SWCX | Swift Agricultural Chemicals Corp. | 1/80; eliminated 7/80 | | NRHS |
| 75 | SWCX | Estech General Chemicals Corp. | added 7/80; eliminated 10/81 | | NRHS |
| 76 | SWCX | Estech, Inc. | added 10/81; eliminated 1/85 | | NRHS |
| 77 | SWCX | *SHERWIN-WILLIAMS CO. OF CANADA, LTD. | | | PWRC |
| 78 | SWCX | *ESTECH, INC. [SWIFT AGRICULTURAL CHEMICALS CORP.] | | | PWRC |
| 79 | SWCX | SWEETWATER CENTRAL RAILROAD | | | PWRC |
| 80 | SWCX | Estech | | | RSRV |
| 81 | SWCY | STALWART TRANSPORTATION | | | SCAC4 |
| 82 | SWD | Southern Winds, S.A. | IATA: A4, Callsign: Southern Winds, IATA Prefix: 242, Ceased Operations in 2005 | RA | AVCODES |
| 83 | SWD | Trifly, LLC | Callsign: Sawblade, | USA | AVCODES |
| 84 | SWD | Southern Winds Airlines | IATA: A4 | | ICAO1 |
| 85 | SWD | Stadtwerke Dachau | City: Dachau | D | TRAFFIC |
| 86 | SWDC | SCHULTZ WILDLIFE BRONZE | | | SCAC4 |
| 87 | SWDE | STATE WIDE TRANSPORT INC | | | SCAC4 |
| 88 | SWDE | SüdWestDeutschen Eisenbahnen | Die französiche Militärregierung hatte die Abtrennung des Eisenbahnverwaltung von der der übrigen Besatzungszonen verfügt, in der Erwartung einer dauerhaften Abtrennung ihres Besatzungsgebiets von Restdeutschland. Mit Gründung der BRD - unter Einschluß der französichen Besatzungszone - wurde dies obsolet | D | TRAFFIC |
| 89 | SWDG | SILVERWOOD SHIPPING CORPORATION | | | SCAC4 |
| 90 | SWDI | SWEDCANUS INTERTRANS INC | | | SCAC4 |
| 91 | SWDJ | SLAWINSKI FARMS | | | SCAC4 |
| 92 | SWDK | STATEWIDE TRANSPORT CORPORATION | | | SCAC1 |
| 93 | SWDL | SPICE WORLD INC | | | SCAC4 |
| 94 | SWDM | SWEET DREAMS TRANSPORTATION | | | SCAC4 |
| 95 | SWDO | SCHWARTZ OIL COMPANY INC | | | SCAC4 |
| 96 | SWDQ | STANWOOD PRODUCTS LIMITED | | | SCAC4 |
| 97 | SWDS | STATEWIDE TRANSPORT INC | | | SCAC4 |
| 98 | SWDV | SWARD, VIC, TRUCKING | | | SCAC1 |
| 99 | SWDV | SW TRUCKING LLC | | | SCAC4 |
| 100 | SWDW | SWITZER TRANSPORT INC | | | SCAC4 |
