| 1 | SLK | SilkAir (S) Pte. Ltd. | IATA: MI, Callsign: Silkair, IATA Prefix: 629, Name changed to SilkAir (SINGAPORE) Pte. Ltd. | SGP | AVCODES |
| 2 | SLK | Independent Air, Inc. | Callsign: Skylark, | USA | AVCODES |
| 3 | SLK | Independent Air, Inc. | Callsign: Skylark, ICAO designator changed to IDN | USA | AVCODES |
| 4 | SLK | SilkAir (SINGAPORE) Pte. Ltd. | IATA: MI, Callsign: Silkair, IATA Prefix: 629, Merged into Singapore Airlines. Name changed from SilkAir (S) Pte. Ltd. | SGP | AVCODES |
| 5 | SLK | SilkAir | IATA: MI | | ICAO1 |
| 6 | SLK | SilkAir Singapore Private Limited | | SGP | TRAFFIC |
| 7 | SLKA | SLOVACEK SAUSAGE CO | | | SCAC4 |
| 8 | SLKB | S & L TRUCKING | | | SCAC4 |
| 9 | SLKC | SALLEY, K C VAN & STORAGE | | | SCAC4 |
| 10 | SLKD | SILK ROAD ENTERPRISES LTD | | | SCAC4 |
| 11 | SLKE | SALT LAKE AIR CARGO | | | SCAC4 |
| 12 | SLKG | SEA-LINK MARINE GROUP OF | | | SCAC4 |
| 13 | SLKK | SOHAL TRUCKING | | | SCAC4 |
| 14 | SLKL | SUN LINK LOGISTICS CO L | | | SCAC4 |
| 15 | SLKN | SERVICE LINK TRANSPORT INC | | | SCAC4 |
| 16 | SLKR | SILK ROAD TRANSLINK INC | | | SCAC4 |
| 17 | SLKT | SALT LAKE TRANSFER COMPANY | | | SCAC1 |
| 18 | SLKT | SALT LAKE TRANSFER CO (A UT CORP) | | | SCAC4 |
| 19 | SLKU | SEA-LINK CONTAINER LINES | | | PWRC |
| 20 | SLKU | Sea-Link Container Lines | | | RSRV |
| 21 | SLKW | STONE LAKE OIL | | | SCAC4 |
