| 1 | SKA | Rio Air Express S/A | Callsign: Rio Express, | BR | AVCODES |
| 2 | SKA | Skyjet Brasil | Callsign: Rio Express, | BR | AVCODES |
| 3 | SKA | Skegness Air Taxi Services Ltd. d/b/a Skegair | Callsign: Skegair, | GB | AVCODES |
| 4 | SKA | Rio Air Express | | | ICAO1 |
| 5 | SKAD | SKATEBOARD EXPRESS | | | SCAC4 |
| 6 | SKAE | SCHULTZ, KELLY ANTIQUES | | | SCAC4 |
| 7 | SKAF | Slovak Air Force | | SK | TRAFFIC |
| 8 | SKAG | SKAGIT FARMERS SUPPLY | | | SCAC4 |
| 9 | SKAI | SKAR TRUCKING INC | | | SCAC4 |
| 10 | SKAJ | Stockholms Kultursällskap för Ånga och Järnväg | | SE | VKM |
| 11 | SKAM | SEAHAW | | | SCAC4 |
| 12 | SKAN | SPRINGFIELD TRUCK LINE LLC | | | SCAC4 |
| 13 | SKAND | SKAND Skalica | | SK | TRAFFIC |
| 14 | SKANE | Skanetrafiken | | S | TRAFFIC |
| 15 | SKANE | Skånetrafiken | | SE | VKM |
| 16 | SKANS | Skanska a.s. | | CZ | VKM |
| 17 | SKAP | SKYLINE DECKING LTD | | | SCAC4 |
| 18 | SKAQ | SEA LINK TRANSPORT INC | | | SCAC4 |
| 19 | SKAR | SASKARC INDUSTRIES INC | | | SCAC4 |
| 20 | SKASK | Skanska SK a.s. | | SK | VKM |
| 21 | SKAT | SKAGIT TRANSPORTATION INC | | | SCAC4 |
| 22 | SKAU | SKAFF CRYOGENICS INC | | USA | BIC |
| 23 | SKAU | Skaff Cryogenics | | | RSRV |
