| 1 | BAO | Bay Air Cargo S/A | Callsign: Bay Cargo, | BR | AVCODES |
| 2 | BAO | Bravo Air Congo Brazzaville | IATA: Z2, | ZRE | AVCODES |
| 3 | BAO | Baden Aircraft Operations GmbH | Callsign: Avangard, | D | AVCODES |
| 4 | BAOA | BARNETT OIL CO | | | SCAC4 |
| 5 | BAOB | BOBS AUTO BODY INC | | | SCAC3 |
| 6 | BAOC | BASILE OIL COMPANY | | | SCAC4 |
| 7 | BAOD | BAUMAN OIL DISTRIBUTORS INC | | | SCAC4 |
| 8 | BAOE | BLUE ARROW EXPRESS INC | | | SCAC3 |
| 9 | BAOE | BARTON TRANSPORT INC | | | SCAC4 |
| 10 | BAOF | BALIO, COSMO | | | SCAC3 |
| 11 | BAOF | B A O FUEL LLC | | | SCAC4 |
| 12 | BAOG | BARTO TRUCKING LLC | | | SCAC4 |
| 13 | BAOI | BARON TRUCKING INC | | | SCAC3 |
| 14 | BAOI | BASEL OIL CO INC | | | SCAC4 |
| 15 | BAOJ | BARTON, JOSEPH INC | | | SCAC3 |
| 16 | BAOK | BAROLE TRUCKING INC | | | SCAC3 |
| 17 | BAOK | BAROLE TRUCKING INC | | | SCAC4 |
| 18 | BAOL | BAER OF LAKE PARK INC | | | SCAC3 |
| 19 | BAOM | BAIN OIL COMPANY INCORPORATED | | | SCAC4 |
| 20 | BAOO | BANNER TRUCK LINE | | | SCAC3 |
| 21 | BAOO | BANDOO, A D & SON TRANSPORT INC | | | SCAC4 |
| 22 | BAOQ | BAIRD OIL CO | | | SCAC4 |
| 23 | BAOR | BARLOW, R A LLC | | | SCAC4 |
| 24 | BAOT | BAO-TRANS ENTERPRISES | | | SCAC3 |
| 25 | BAOX | British American Oil Co. | 7/1937-10/1957; eliminated 4/1960 | | NAKINA |
| 26 | BAOX | Canadian General Transit Co., Ltd. | added 4/1960; 4/1961 (not listed); eliminated 4/1961 | | NAKINA |
| 27 | BAOX | The British American Oil Co., Ltd. | 8/1920-7/1935 | | NAKINA |
| 28 | BAOX | British American Oil Co. | 4/38-10/57 | | NRHS |
| 29 | BAOX | Canadian General Transit Co., Ltd. | 4/61; eliminated 4/61 | | NRHS |
| 30 | BAOX | *BRITISH AMERICAN OIL CO. | | | PWRC |
| 31 | BAOX | *CANADIAN GENERAL TRANSIT CO., LTD. | | | PWRC |
