| 1 | STU | Servicios de Transportes Aéreos Fueguinos, S.A. | IATA: FS, Callsign: Fueguino, IATA Prefix: 278, Ceased operations 2005. Designator FS* reinstated by IATA | RA | AVCODES |
| 2 | STU | Star African Air | Callsign: Starsom, | SO | AVCODES |
| 3 | STU | Strategic Airlines SA | Callsign: Luxliner, Ceased Operations on 03 October 2012 | L | AVCODES |
| 4 | STU | Star African Air | | | ICAO1 |
| 5 | STU | Servicios de Transportes Aéreos Fueguinos | IATA: FS | | ICAO1 |
| 6 | STUB | Stubaitalbahn | | A | TRAFFIC |
| 7 | STUD | STUDERUS, GORD TRUCKING | | | SCAC4 |
| 8 | STUF | Stufenbahn | | D | TRAFFIC |
| 9 | STUG | SINCLAIR TRUCKING COMPANY | | | SCAC4 |
| 10 | STUI | SACCO TRUCKING INC | | | SCAC4 |
| 11 | STUL | SCL BERN AG IN BERN | | | SCAC4 |
| 12 | STUS | STUSCO | | | SCAC4 |
| 13 | STUT | STUTSMAN TRANSPORTATION INC | | | SCAC4 |
| 14 | STUTG | Stuttgart, Lilliput Eisenbahn | | D | TRAFFIC |
| 15 | STUU | STUBBE B.V. | | NL | BIC |
| 16 | STUW | STAR PETROLEUM | | | SCAC4 |
| 17 | STUX | Suburban Fuel Tank Car Co. | added 7/1970; 1/1975 | | NAKINA |
| 18 | STUX | Suburban Tank Car Co. | eliminated 1/1979 | | NAKINA |
| 19 | STUX | Continental Tank Car Corp. | added 1/1979; 1/1980; eliminated 10/1980 | | NAKINA |
| 20 | STUX | Suburban Fuel Tank Car Co. | added 7/70; 1/75 | | NRHS |
| 21 | STUX | Suburban Tank Car Co. | eliminated 1/79 | | NRHS |
| 22 | STUX | Continental Tank Car Corp. | added 1/79; 1/80; eliminated 10/80 | | NRHS |
| 23 | STUX | CONTINENTAL TANK CAR CORP. [SUBURBAN TANK CAR CO.] | | | PWRC |
