| 1 | SAP | Sardairline | Callsign: Sardair, | I | AVCODES |
| 2 | SAP | Avia Jaynar, Air Company LLC | IATA: JN, Callsign: Tobol, | KZ | AVCODES |
| 3 | SAP | Asap Air, Inc. | Callsign: Asap Air, | USA | AVCODES |
| 4 | SAP | Avia Jaynar | | | ICAO1 |
| 5 | SAPB | SELANDIA SHIP MANAGEMENT (SINGAPORE | | | SCAC4 |
| 6 | SAPC | S & P CARRIER LTD | | | SCAC4 |
| 7 | SAPE | SAPA EXTRUSIONS INC | | | SCAC4 |
| 8 | SAPF | SANCHEZ PAZ, FRANCISCO RENE | | | SCAC4 |
| 9 | SAPI | SHARP TRANSPORTATION INC | | | SCAC4 |
| 10 | SAPK | SANTA ANITA EXPRESS INC | | | SCAC4 |
| 11 | SAPL | SAURDIFF, PAUL & SONS | | | SCAC4 |
| 12 | SAPM | S & A PETROLEUM INC | | | SCAC4 |
| 13 | SAPN | SHIPCRAFT A/S | | | SCAC4 |
| 14 | SAPP | STANDING ALONE, PETE | | | SCAC4 |
| 15 | SAPQ | SAPSAN | | | SCAC4 |
| 16 | SAPT | Savannah Port Terminal R.R., Inc. | added 10/1998; 7/2000-7/2005 | | NAKINA |
| 17 | SAPT | Savannah Port Terminal R.R., Inc. | added 10/98; 7/2000 | | NRHS |
| 18 | SAPT | SAVANNAH PORT TERMINAL RAILROAD | | | PWRC |
| 19 | SAPT | Savannah Port Terminal Railroad | | | RSRV |
| 20 | SAPT | SAVANNAH PORT TERMINAL RAILROAD INC | | | SCAC4 |
| 21 | SAPU | SAMPSON CONTAINERS CO., LTD. | | PRC | BIC |
| 22 | SAPW | STAM SHIPPING S A | | | SCAC4 |
| 23 | SAPX | SULCOM, Inc. | added 7/2008 | | NAKINA |
| 24 | SAPX | St. Ansgar Produce Co. | 7/1930-7/1932 | | NAKINA |
| 25 | SAPX | *ST. ANSGAR PRODUCE CO. | | | PWRC |
| 26 | SAPX | +SULCOM, INC. | | | PWRC |
| 27 | SAPX | SLOCUM INC | | | SCAC4 |
| 28 | SAPY | STELLA POLARIS LLC | | | SCAC4 |
| 29 | SAPZ | SAND PLANT | | | PWRC |
