| 1 | BQ | Aeromar C. Por. A. | ICAO: ROM, Callsign: Bravo Quebec, IATA Prefix: 926, Name changed to Aeromar Airlines | DOM | AVCODES |
| 2 | BQ | Open Joint-stock company Bukovyna | ICAO: BKV, Callsign: Bukovyna, Designator BQ recalled by IATA. Founded in 1999. | UA | AVCODES |
| 3 | BQ | Virgin Express | ICAO: EBA, Name changed from EuroBelgian Airlines w.e.f. 23 April 1996. | B | AVCODES |
| 4 | BQ | EuroBelgian Airlines | ICAO: EBA, Callsign: Belstar, Change of name to Virgin Express w.e.f. 23 April 1996. | B | AVCODES |
| 5 | BQ | Virgin Express | ICAO: EBA, IATA designator changed to TV w.e.f. 26 October 1997. | B | AVCODES |
| 6 | BQ | Harlequin Air Corporation | ICAO: HLQ, Callsign: Harlequin, IATA designator changed to JH | J | AVCODES |
| 7 | BQ | Aeromar Airlines | ICAO: ROM, Callsign: Bravo Quebec, IATA Prefix: 926, Name changed from Aeromar C. Por. A. | DOM | AVCODES |
| 8 | BQ | Aermediterranea Linee Aeree Mediterranee S.p.A. | ICAO: BQI, Callsign: Mediterranea, Merged into ATI | I | AVCODES |
| 9 | BQ | Bravo Airlines | ICAO: BBV, | E | AVCODES |
| 10 | BQ | Air Bashkortostan Ltd | ICAO: BBT, IATA Prefix: 894, IATA designator changed to ZU | RUS | AVCODES |
| 11 | BQ | Sky Alps S.r.l. | ICAO: SWU, Callsign: Skyalps, Flights operated by LuxWing Ltd. (BN/LWG) Until own AOC obtained. | I | AVCODES |
| 12 | BQ | Bay of Quinte Ry. Co. (Canadian National Rys.) | 8/1920-7/1923 | | NAKINA |
| 13 | BQ | Bay of Quinte Ry. Co. (Canadian National Rys.) | 23-Jul | | NRHS |
| 14 | BQ | CANADIAN NATIONAL RAILWAYS [BAY OF QUINTE RY. CO.] | | | PWRC |
| 15 | BQA | Boutique Aviation AG | Callsign: Aviation, | CH | AVCODES |
| 16 | BQAA | BELLA MARITIME CORPORATION | | | SCAC3 |
| 17 | BQAF | BURWAIN AFRIC LIMITED | | | SCAC3 |
| 18 | BQAF | BRABER EQUIPMENT LTD | | | SCAC4 |
| 19 | BQAR | BARKER, CAROLYN AND OSSIE | | | SCAC4 |
| 20 | BQB | Los Cipreses S.A. d/b/a BQB Lineas Aéreas | IATA: 5Q, IATA Prefix: 567, Suspened operations on 11 April 2015. Commenced operations in May 2010. Subsidiary of ferry company Buquebus. | ROU | AVCODES |
| 21 | BQCC | BARACCUDA MARITIME S A | | | SCAC3 |
| 22 | BQCI | BERGER CHARLOTTE INC | | | SCAC4 |
| 23 | BQCL | BALFOUR QUTHRIE & CO LTD | | | SCAC3 |
| 24 | BQCN | BORINQUEN CORPORATION | | | SCAC4 |
| 25 | BQCU | Bechtel International | | | RSRV |
| 26 | BQDS | B&Q DISTRIBUTION SERVICE, INC | | | SCAC3 |
| 27 | BQEG | BLUE EAGLE CONSOLIDATION GMBH | | | SCAC3 |
| 28 | BQEG | BLUE EAGLE CONSOLIDATION GMBH | | | SCAC4 |
| 29 | BQET | BETTIN TRUCKING | | | SCAC4 |
| 30 | BQGA | BLOOMIN GARDENER, THE | | | SCAC4 |
| 31 | BQI | Aermediterranea Linee Aeree Mediterranee S.p.A. | IATA: BQ, Callsign: Mediterranea, Merged into ATI | I | AVCODES |
| 32 | BQI | Aermediterranea Linee Aeree Mediterranee S.p.A. | IATA: VQ, Callsign: Mediterranea, | I | AVCODES |
| 33 | BQIC | BAILEY LOGISTICS INC | | | SCAC4 |
| 34 | BQIF | BEST INTERNATIONAL FREIGHT SERVICES | | | SCAC3 |
| 35 | BQKA | BAKER ATLAS | | | SCAC4 |
| 36 | BQKC | BERGER TRANSER & STORAGE INC | | | SCAC4 |
| 37 | BQL | BELLE QUIP LTD. | | | PWRC |
| 38 | BQLC | BLTCO INC | | | SCAC3 |
| 39 | BQLD | BALLARD SHIPPING COMPANY | | | SCAC3 |
| 40 | BQLG | BLUE LEGEND CORP | | | SCAC3 |
| 41 | BQLI | B-LINE CARRIERS INC | | | SCAC4 |
| 42 | BQLM | BELMONT COMPANY LIMITED | | | SCAC3 |
| 43 | BQLN | B-LINE AUTO TRANSPORTING | | | SCAC3 |
| 44 | BQLN | BLOSSOM QUALITY LOGISTICS INC | | | SCAC4 |
| 45 | BQLS | BEAR LOGISTICS | | | SCAC4 |
| 46 | BQLT | BLT TRUCKING | | | SCAC3 |
| 47 | BQLT | B & L TRANSPORT INC | | | SCAC4 |
| 48 | BQLV | BERGER LOUISVILLE INC | | | SCAC4 |
| 49 | BQLY | BROMLEY SHIPPING COMPANY | | | SCAC3 |
| 50 | BQMV | BAY OF QUINTE MOVERS | | | SCAC4 |
| 51 | BQNL | BREQUAN LOGISTICS | | | SCAC4 |
| 52 | BQOC | BROOKS OIL COMPANY | | | SCAC4 |
| 53 | BQOM | BLUE OCEAN MARINE | | | SCAC3 |
| 54 | BQRE | BRENNY TRANSPORTATION INC | | | SCAC4 |
| 55 | BQRT | BROTHERHOOD TRUCKING INC | | | SCAC4 |
| 56 | BQSC | BROWN LOGISTICS SERVICES INC | | | SCAC4 |
| 57 | BQSE | BAR S E TRUCKING LTD | | | SCAC3 |
| 58 | BQSE | BAR S E TRUCKING LTD | | | SCAC4 |
| 59 | BQSI | BOSS INTERNATIONAL INC. LADSON SC | | | SCAC3 |
| 60 | BQSI | BOSS INTERNATIONAL INC. LADSON SC | | | SCAC4 |
| 61 | BQSN | BENSON | | | SCAC3 |
| 62 | BQSQ | B & S TRUCKING & SONS | | | SCAC4 |
| 63 | BQTD | BARTEL, DALE | | | SCAC4 |
| 64 | BQTF | BROTHERS TRANSFER | | | SCAC4 |
| 65 | BQTI | BRAZ TRANS INC | | | SCAC4 |
| 66 | BQTP | BTR TRAILER REPAIR INC | | | SCAC4 |
| 67 | BQTR | BRIDGETOWN TRUCKING | | | SCAC4 |
| 68 | BQTT | BLT TANKS LLC | | | SCAC4 |
| 69 | BQYG | BART QUALITY MOVING INC | | | SCAC3 |
