| 1 | SJ | Aviandina S.A.C. | ICAO: VND, Callsign: Aviandina, IATA Prefix: 178, Designator SJ* reinstated by IATA | PE | AVCODES |
| 2 | SJ | South Pacific Air Charters Ltd. t/a Freedom Air International | ICAO: FOM, Callsign: Free Air, ICAO callsign changed to Freedom | NZ | AVCODES |
| 3 | SJ | Southern Air Transport, Inc. | ICAO: SJM, Callsign: Southern Air, Ceased operations | USA | AVCODES |
| 4 | SJ | Sriwijaya Air PT | ICAO: SJY, Callsign: Sriwijaya, IATA Prefix: 977, Designator SJ reinstated by IATA | RI | AVCODES |
| 5 | SJ | South Pacific Air Charters Ltd. t/a Freedom Air International | ICAO: FOM, Callsign: Freedom, ICAO callsign changed from Free Air | NZ | AVCODES |
| 6 | SJ | South Pacific Air Charters Ltd. t/a Freedom Air International | ICAO: FOM, Callsign: Freedom, ICAO callsign changed from Freedom | NZ | AVCODES |
| 7 | SJ | South Pacific Air Charters Ltd. t/a Freedom Air International | ICAO: FOM, Callsign: Free Air, Founded in 1995. Commenced operations in 1995. Ceased operations on 30 March 2008. ICAO callsign changed from Freedom | NZ | AVCODES |
| 8 | SJ | | | S | TRAFFIC |
| 9 | SJ | SJ AB | | SE | VKM |
| 10 | SJ&E | San Joaquin & Eastern R.R. Co. | 7/1923-7/1932 | | NAKINA |
| 11 | SJ&E | SAN JOAQUIN & EASTERN RAILROAD CO. | | | PWRC |
| 12 | SJ&L | St. Johnsbury & Lake Champlain R.R. Co. (Boston & Maine R.R.) | 7/1923 | | NAKINA |
| 13 | SJ&L | St. Johnsbury & Lake Champlain R.R. Co. | 4/1938 | | NAKINA |
| 14 | SJ&L | St. Johnsbury & Lake Champlain R.R. Co. | Apr-38 | | NRHS |
| 15 | SJ&L | BOSTON & MAINE RAILROAD [ST. JOHNSBURY & LAKE CHAMPLAIN RAILROAD CO.] | | | PWRC |
| 16 | SJA | Servicios Aereos Especiales de Jalisco, S.A. de C.V. | Callsign: Serviciojal, | MEX | AVCODES |
| 17 | SJA | San Juan Airlines | Callsign: San Juan, | PRI | AVCODES |
| 18 | SJA | Sky Jet Aviation Ltd. | IATA: UQ, | EAU | AVCODES |
| 19 | SJA | Sawyer Aviation, LLC | Callsign: Sawyer, | USA | AVCODES |
| 20 | SJA | Servicios Aereos Especiales De Jalisco | | | ICAO1 |
| 21 | SJAA | SALLEY, JAMES A | | | SCAC4 |
| 22 | SJAD | SMITH, JAMES D INDUSTRIES INC | | | SCAC4 |
| 23 | SJAI | SJA TRANSPORT INC | | | SCAC4 |
| 24 | SJAJ | SJA INC | | | SCAC4 |
| 25 | SJAK | STEEPLEJACK SERVICES | | | SCAC4 |
| 26 | SJAL | SAM J R S LLC | | | SCAC4 |
| 27 | SJAP | STEWART, JAMES P | | | SCAC4 |
| 28 | SJAX | S.J. Alexander, Inc. | 1/1950 (not listed) | | NAKINA |
| 29 | SJAX | S. J. ALEXANDER, INC. | | | PWRC |
| 30 | SJB | SKS Airways Sdn Bhd. | IATA: KI, Callsign: Southern Tiger, | MAL | AVCODES |
| 31 | SJB | St. Joseph Belt Ry. Co. | 7/1923-1/1975 | | NAKINA |
| 32 | SJB | St. Joseph Belt Ry. Co. | 4/38-1/75 | | NRHS |
| 33 | SJB | ST. JOSEPH BELT RAILWAY CO. | | | PWRC |
| 34 | SJBE | ST JOHN BOSCO XPRESS INC | | | SCAC4 |
| 35 | SJBL | S & JBL INC | | | SCAC4 |
| 36 | SJBT | SJOSTROM, BOB TRUCKING | | | SCAC4 |
| 37 | SJC | Servicios Ejecutivos Continental, S.A. de C.V. | Callsign: Serviejectivo, | MEX | AVCODES |
| 38 | SJC | Southend Jet Centre Ltd. | | GB | AVCODES |
| 39 | SJC | Servicios Ejecutivos Continental | | | ICAO1 |
| 40 | SJCC | SJC CORP | | | SCAC4 |
| 41 | SJCG | SEALS JR, C TRUCKING | | | SCAC4 |
| 42 | SJCL | SJC LOGISTICS LLC | | | SCAC4 |
| 43 | SJCU | SHANGHAI SHENGJI SPECIAL CONTAINER CO., LTD. | | PRC | BIC |
| 44 | SJD | Sino Jet Limited | Callsign: Air Sino, | PRC | AVCODES |
| 45 | SJDC | STREETT, J D & CO INC | | | SCAC4 |
| 46 | SJDG | SEPPALA, JOYCE DESIGNS | | | SCAC4 |
| 47 | SJDL | S & J DRAYAGE LLC | | | SCAC4 |
| 48 | SJDP | SMITH, J D TRANSPORT | | | SCAC4 |
| 49 | SJDS | SMITH, J D & SONS LIMITED | | | SCAC4 |
| 50 | SJE | Sunair 2001 (Pty) Ltd. | Callsign: Sunbiz, | ZA | AVCODES |
| 51 | SJE | Sun Air Jets | Callsign: Sun Journey, | USA | AVCODES |
| 52 | SJE | Sunair 2001 | | | ICAO1 |
| 53 | SJEF | STEWART, JEFF | | | SCAC4 |
| 54 | SJEI | SCHELL, JERRY ENTERPRISES INC | | | SCAC4 |
| 55 | SJEN | STROUD, JENNIFER | | | SCAC4 |
| 56 | SJER | SCHMIDT, JERRYN | | | SCAC4 |
| 57 | SJET | SMITH, J. E., TRUCKING | | | SCAC1 |
| 58 | SJEW | SVEA JEWELRY DESIGN | | | SCAC4 |
| 59 | SJEX | SJEX, Inc. | added 7/1986; eliminated 1/1990; 1/1994-7/2005 (not listed) | | NAKINA |
| 60 | SJEX | SJEX, Inc. | added 7/86; eliminated 1/90; 1/94-7/2000 | | NRHS |
| 61 | SJEX | SJEX, INC. | | | PWRC |
| 62 | SJEX | SJEX Inc. | | | RSRV |
| 63 | SJEX | SJEX, INC. | | | SCAC4 |
| 64 | SJEY | SHAW JEWELRY | | | SCAC4 |
| 65 | SJF | Fly Skyjet | Callsign: Harmattan, | RN | AVCODES |
| 66 | SJFA | SAN JUAN FUEL INC | | | SCAC4 |
| 67 | SJFC | S J FUEL CO INC | | | SCAC4 |
| 68 | SJFI | ST JOHN LOGISTICS INC | | | SCAC4 |
| 69 | SJFL | S J FUEL SOUTH CO INC | | | SCAC4 |
| 70 | SJFM | ST JOHNS FREIGHT COMPANY LLC | | | SCAC4 |
| 71 | SJFR | SPENCER, JEFF TRUCKING INC | | | SCAC4 |
| 72 | SJFS | STROUD, JOHN F & SON INC | | | SCAC4 |
| 73 | SJFX | Western Fuels & Asphalt Supply Co. | added 10/2003; 7/2005 | | NAKINA |
| 74 | SJFX | WESTERN FUELS & ASPHALT SUPPLY CO. | | | PWRC |
| 75 | SJFX | WESTERN FUELS & ASPHALT SUPPLY INC | | | SCAC4 |
| 76 | SJG | Star Jet Airlines | | GH | AVCODES |
| 77 | SJG | ALG Group LLC | Callsign: Summer Jet, NorthAmerican subsidiary of Weststar Aviation Services Sdn Bhd. | USA | AVCODES |
| 78 | SJGI | St. Joseph & Grand Island Ry. Co. | 7/1923 | | NAKINA |
| 79 | SJGI | St. Joseph & Grand Island Ry. Co. (Union Pacific System) | 7/1930 | | NAKINA |
| 80 | SJGI | St. Joseph & Grand Island Ry. Co. | 7/1932-7/1935 | | NAKINA |
| 81 | SJGI | St. Joseph & Grand Island Ry. Co. (Union Pacific R.R. Co.) | 7/1936 | | NAKINA |
| 82 | SJGI | St. Joseph & Grand Island Ry. | 4/1938-7/1954 | | NAKINA |
| 83 | SJGI | St. Joseph & Grand Island Ry. | 4/38-1/52 | | NRHS |
| 84 | SJGI | UNION PACIFIC [ST. JOSEPH & GRAND ISLAND RWY.] | | | PWRC |
| 85 | SJGL | SJ GEOPHYSICS LTD | | | SCAC4 |
| 86 | SJGX | S.J. Groves & Sons Construction Co | | USA | TRAFFIC |
| 87 | SJHI | SIMS, J H TRUCKING COMPANY INC | | | SCAC4 |
| 88 | SJHJ | SALDIVAR JUAREZ, HERMANN JOSE | | | SCAC4 |
| 89 | SJHK | SMITH, JACK H TRUCKING INC | | | SCAC4 |
| 90 | SJHL | ST JOHN HAULING LLC | | | SCAC4 |
| 91 | SJHP | STOOPS, JOHN P | | | SCAC4 |
| 92 | SJHS | SEALE, J H & SON INC | | | SCAC4 |
| 93 | SJHT | SANJAN HOT SHOT AND TRANSPORT | | | SCAC4 |
| 94 | SJIA | S & J INTERMODAL AND LOGISTICS LLC | | | SCAC4 |
| 95 | SJIC | SANDERS, JIMMY INC | | | SCAC4 |
| 96 | SJIU | PT. SINARJAYA INTIMPERKASA | | RI | BIC |
| 97 | SJJ | Spirit Aviation, Inc. | Callsign: Spirit Jet, Name change to Spirit Jets, LLC | USA | AVCODES |
| 98 | SJJ | Spirit Jets, LLC | Callsign: Spirit Jet, Name change from Spirit Aviation, Inc. | USA | AVCODES |
| 99 | SJJ | Spirit Aviation | | | ICAO1 |
| 100 | SJJI | SULLIVAN, J J | | | SCAC4 |
