| 1 | WSA | Westates Airlines | Callsign: Westates, | USA | AVCODES |
| 2 | WSA | Westgates Airlines | | | ICAO1 |
| 3 | WSAC | WESTERN DEDICATED LP | | | SCAC4 |
| 4 | WSAG | WESTERN SHIPPING PTE LTD | | | SCAC4 |
| 5 | WSAJ | WESTERN STAR TRANSPORTATION | | | SCAC4 |
| 6 | WSAL | WESTERN SALES INC | | | SCAC4 |
| 7 | WSAM | WESTERN SHIPPING AMERICA INC | | | SCAC4 |
| 8 | WSAN | WSA LINES (INTL) LTD | | | SCAC4 |
| 9 | WSAO | WHITE, S A OIL CO INC | | | SCAC4 |
| 10 | WSAQ | WEICHENG SEA & AIR LOGISTICS LTD | | | SCAC4 |
| 11 | WSAR | WERTMAN, S A TRUCKING | | | SCAC4 |
| 12 | WSAS | WASHINGTON & SONS CORPORATION | | | SCAC4 |
| 13 | WSAT | WIL-TRANS | | | SCAC4 |
| 14 | WSAW | WILSON LAKE INC | | | SCAC4 |
| 15 | WSAY | WSA TRUCKING CO | | | SCAC1 |
| 16 | WSAY | WSA TRUCKING CO | | | SCAC4 |
