| 1 | STZ | Sat Air | Callsign: Air Sat, | BIH | AVCODES |
| 2 | STZ | Star Air | IATA: 5H, IATA Prefix: 301, ICAO designator changed to STQ | RI | AVCODES |
| 3 | STZ | Strategic Airlines SAS | IATA: EF, Callsign: French Bird, AOC revoked/not renewed | F | AVCODES |
| 4 | STZ | Biz Africa 1019 CC t/a Studio 88 Aviation | Callsign: Studio, | ZA | AVCODES |
| 5 | STZ | Setuza a.s. | | CZ | TRAFFIC |
| 6 | STZA | SK TRANSPORTATION INC | | | SCAC4 |
| 7 | STZB | SIX TWO ZERO SIX THREE SIX ONE (620 | | | SCAC4 |
| 8 | STZC | STAC TRANSPORTATION INC | | | SCAC4 |
| 9 | STZD | SATELLITE SPECIALIZED TRANSPORTATIO | | | SCAC4 |
| 10 | STZF | STOLTZFUS TRUCK BROKERAGE INC | | | SCAC4 |
| 11 | STZG | STE | | | SCAC4 |
| 12 | STZM | STUTZMAN, E J INC | | | SCAC4 |
| 13 | STZQ | SHANTZ CARTAGE INC | | | SCAC4 |
| 14 | STZT | STOLTZFUS TRANSPORT | | | SCAC4 |
| 15 | STZW | STOLT TANKERS INC | | | SCAC1 |
| 16 | STZW | STOLT TANKERS BV | | | SCAC4 |
