| 1 | Q | Inch | | | TRAFFIC |
| 2 | Q&LS | Quebec & Lake St. John Ry. (Canadian National Rys.) | 8/1920-7/1923 | | NAKINA |
| 3 | Q&LS | CANADIAN NATIONAL RWYS. [QUEBEC & LAKE ST. JOHN RWY.] | | | PWRC |
| 4 | Q0 | Quebecair Express | Designator Q0* recalled by IATA | CDN | AVCODES |
| 5 | Q1 | PT. Sqiva Sistem | Computer Reservations Systems (CRS) | RI | AVCODES |
| 6 | Q2 | Island Aviation Services Ltd. | ICAO: DQA, Callsign: Island Aviation, IATA Prefix: 986, IATA Prefix code reinstated. | MV | AVCODES |
| 7 | Q2 | Minerva Airlines | ICAO: MTC, Callsign: Air Minerva, IATA designator changed to Q9* | I | AVCODES |
| 8 | Q3 | Mines Air Services Zambia Limited | ICAO: MAZ, IATA Prefix: 391, | Z | AVCODES |
| 9 | Q3 | Zambian Airways | ICAO: MBN, Callsign: Zambiana, IATA Prefix: 391, Suspened Operation January 2009. ICAO designator changed from MAZ. Formerly Roan Air. ICAO callsin changed from Mines | Z | AVCODES |
| 10 | Q3 | Roan Air | ICAO: MAZ, IATA Prefix: 391, Name changed to Zambian Airways | Z | AVCODES |
| 11 | Q3 | Zambian Airways | ICAO: MAZ, Callsign: Mines, IATA Prefix: 391, ICAO designator changed to MBN. Formerly Roan Air | Z | AVCODES |
| 12 | Q3 | Anguilla Air Services Ltd. | ICAO: AXL, | AIA | AVCODES |
| 13 | Q4 | Qatar Amiri Flight | ICAO: QAF, Callsign: Amiri, Designator Q4* recalled by IATA. | Q | AVCODES |
| 14 | Q4 | Steffen Air Charter Services d/b/a Swazi Express Airways | ICAO: SWX, Callsign: Swazi Express, Ceased operations on 04 April 2008. | SD | AVCODES |
| 15 | Q4 | Master Top Linhas Aereas Ltda | ICAO: MST, Designator Q4* recalled by IATA | BR | AVCODES |
| 16 | Q4 | Starlink Aviation Inc. | ICAO: TLK, Callsign: Starlink, Designator Q4 recalled by IATA | CDN | AVCODES |
| 17 | Q4 | euroairlines, S.L. | ICAO: ELE, Callsign: Euroline, IATA Prefix: 291, | E | AVCODES |
| 18 | Q5 | 40-Mile Air, Ltd. | ICAO: MLA, Callsign: Mile Air, IATA chaned from 6M | USA | AVCODES |
| 19 | Q5 | Sutra Air Charter (M) Sdn. Bhd. | | MAL | AVCODES |
| 20 | Q6 | Aero-Cóndor, S.A. | ICAO: CDP, Callsign: Condor-Peru, IATA Prefix: 381, Operations suspended during June 2008. Designator Q6 recalled by IATA | PE | AVCODES |
| 21 | Q6 | Skytrans Regional Pty Ltd t/a Skytrans Airlines | ICAO: SKP, Callsign: Skytrans, Designator Q6 reinstated by IATA | AUS | AVCODES |
| 22 | Q6 | Vuela Aviacion S.A. (Volaris Costa Rica) | ICAO: VOC, Callsign: Costa Rican, Air Operator Certificate granted on 10 Nevmber 2016. | CR | AVCODES |
| 23 | Q7 | Sobelair | ICAO: SLR, Callsign: Sobelair, Ceased operations | B | AVCODES |
| 24 | Q7 | Interstate Equipment Leasing, Inc. d/b/a Swift Air | ICAO: SWQ, Callsign: Swiftflight, IATA designator changed to WQ. | USA | AVCODES |
| 25 | Q7 | Queensland Regional Airlines Pty Ltd. | Designator Q7* recalled by IATA | AUS | AVCODES |
| 26 | Q7 | SkyBahamas Airlines | ICAO: SBM, | BS | AVCODES |
| 27 | Q7 | DHL Air (Austria) GmbH | ICAO: DHA, Callsign: Yellow Tail, | A | AVCODES |
| 28 | Q8 | Pacific East Asia Cargo Airlines, Inc. | ICAO: PEC, Callsign: Pac-East Cargo, IATA Prefix: 505, Ceased operations on 30 December 2010. Designator Q8 reinstated by IATA | RP | AVCODES |
| 29 | Q8 | Trans Air Congo (TAC) | ICAO: TSG, Callsign: Trans-Congo, Designator Q8* recalled by IATA. IATA Accounting code 223 recalled. | RCB | AVCODES |
| 30 | Q9 | Interbrasil Star, S.A. | ICAO: ITB, Callsign: Interbrasil, IATA Prefix: 151, Designator Q9 recalled by IATA. Designator Q9 reinstated by IATA | BR | AVCODES |
| 31 | Q9 | Afrinat (Gambia) International Airlines, Inc. | ICAO: AFU, Callsign: Afrinat, Designator Q9 reinstated by IATA | GH | AVCODES |
| 32 | Q9 | Minerva Airlines | ICAO: MTC, Callsign: Air Minerva, IATA designator changed from Q2*, then changed to N4 | I | AVCODES |
| 33 | Q9 | QuikAir Airline Service Inc | Ceased Operations on 24 October 2006. | CDN | AVCODES |
| 34 | Q9 | Arik Niger | ICAO: NAK, Callsign: Niger Arik, Ceased Operations in April 2009 and shutdown in February 2010. | RN | AVCODES |
| 35 | Q9 | Sky Jet M.G. Inc. | Commenced Operations on 01 August 2007. IATA Designator changed to DU. | CDN | AVCODES |
| 36 | Q9 | Kuwait National Airways (K.C.S.) t/a Wataniya Airways | Callsign: Wataniya, Received its AOC from Kuwait�s DGCA in June 2017. | KWT | AVCODES |
| 37 | Q9 | Green Africa Airways Limited | ICAO: GWG, Callsign: Green Africa, | WAN | AVCODES |
| 38 | QA | Aerocaribe | ICAO: CBE, Callsign: Aerocaribe, IATA Prefix: 723, Founded in 1972. Name changed to Mexicana Click in July 2005. | MEX | AVCODES |
| 39 | QA | Alidair Cargo Ltd. | Name changed to Inter City Airlines | GB | AVCODES |
| 40 | QA | Inter City Airlines | ICAO: CIT, Callsign: Quebec Alpha, Ceased operations in August 1983. Name changed from Alidair | GB | AVCODES |
| 41 | QA | Starlight Airline STP, S.A. | ICAO: SLT, Callsign: Starlight Cargo, IATA Prefix: 321, | STP | AVCODES |
| 42 | QA | African Express Airways (Kenya) Limited | ICAO: AEK, Callsign: African Express, | EAK | AVCODES |
| 43 | QA | MexicanaClick | ICAO: CBE, Callsign: Click, IATA Prefix: 723, Ceased all operations on 28 August 2010. Name changed from Aerocaribe | MEX | AVCODES |
| 44 | QA | Cimber A/S | ICAO: CIM, Callsign: Cimber, Merged into CityJet during 2018. Founded on 15 May 2012. Commenced operations on 16 May 2012 | DK | AVCODES |
| 45 | QA | Queen Bilqis Airways | ICAO: QBA, Callsign: Bilqis, | YAR | AVCODES |
| 46 | QA&P | Quanah, Acme & Pacific Ry. Co. | 7/1923 | | NAKINA |
| 47 | QA&P | QUANAH, ACME & PACIFIC RWY. CO. | | | PWRC |
| 48 | QAC | Qatar Air Cargo | Callsign: Qatar Cargo, | Q | AVCODES |
| 49 | QAC | Qatar Air Cargo | | | ICAO1 |
| 50 | QACG | QUINCY AIR CARGO INC | | | SCAC3 |
| 51 | QACL | QUEST AIRCRAFT COMPANY LLC | | | SCAC4 |
| 52 | QADQ | QUAD CITY LEASING COMPANY INC | | | SCAC3 |
| 53 | QADT | QUAD TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 54 | QAF | Qatar Amiri Flight | IATA: Q4, Callsign: Amiri, Designator Q4* recalled by IATA. | Q | AVCODES |
| 55 | QAF | Qatar Amiri Flight | Callsign: Amiri, Designator Q4* recalled by IATA. | Q | AVCODES |
| 56 | QAF | Qatar Amiri Flight | | | ICAO1 |
| 57 | QAFI | QUALITY AIR FORWARDING INC | | | SCAC4 |
| 58 | QAH | Quick Airways Holland B.V. | Callsign: Quick, | NL | AVCODES |
| 59 | QAH | Quick Airways Holland | | | ICAO1 |
| 60 | QAI | Conquest Air, Inc. | IATA: C4, Callsign: Chickpea, IATA Prefix: 340, | USA | AVCODES |
| 61 | QAJ | Quick Air Jet Charter GmbH | Callsign: Dagobert, | D | AVCODES |
| 62 | QAJ | Quick Air Jet Charter | | | ICAO1 |
| 63 | QALL | QUALLS OIL CO INC | | | SCAC4 |
| 64 | QALT | QUALITY TRANSPORTATION INC | | | SCAC3 |
| 65 | QALY | QUALITY TRANSPORT INC | | | SCAC3 |
| 66 | QANA | QANTAS AIRWAYS LTD | | | SCAC4 |
| 67 | QAP | (QA&P) Quanah, Acme & Pacific Ry. Co. | 7/1930-1/1980; eliminated 7/1981 | | NAKINA |
| 68 | QAP | Quanah, Acme & Pacific Ry. Co. | 4/38-1/80; eliminated 7/81 | | NRHS |
| 69 | QAP | QUANAH, ACME & PACIFIC RWY. CO. | | | PWRC |
| 70 | QAPE | QU'APPELLE APPALOOSA RANCH | | | SCAC4 |
| 71 | QAPI | QWEST AIR PARTS INC | | | SCAC4 |
| 72 | QAQ | Qurinea Air Service | Callsign: Qurinea Air, | LAR | AVCODES |
| 73 | QAQ | Qurinea Air Service | | | ICAO1 |
| 74 | QAQL | QUICK AND QUALITY LOGISTICS INC | | | SCAC4 |
| 75 | QARX | QUEEN ANNE'S RAILROAD TOURIST / DINNER TRAIN OPERATOR | | | PWRC |
| 76 | QAS | Quisqueya Airlines, S.A. | Callsign: Quisqueya, | RH | AVCODES |
| 77 | QAS | Quisqueya Airlines | | | ICAO1 |
| 78 | QASW | Q ARION SHIPPING LTD | | | SCAC4 |
| 79 | QAT | Aero Taxi | Callsign: Air Quasar, | CDN | AVCODES |
| 80 | QAT | Aero Taxi | | | ICAO1 |
| 81 | QATA | QATAR AIRWAYS | | | SCAC4 |
| 82 | QATI | QAT INC | | | SCAC3 |
| 83 | QATL | QUADRA TRANSPORT LTD | | | SCAC3 |
| 84 | QATP | QUALITY TRANSPORT, INC | | | SCAC3 |
| 85 | QATP | QUALITY TRANSPORT INC | | | SCAC4 |
| 86 | QATR | QATAR SHIPPING COMPANY Q S C | | | SCAC4 |
| 87 | QATT | QUALITY AUTO TRANSPORT | | | SCAC3 |
| 88 | QATY | QUALITY HOT MIX TRUCKING INC | | | SCAC4 |
| 89 | QAUQ | QUOTE A UNQUOTE TRANSPORTATION INC | | | SCAC3 |
| 90 | QAV | QA Aviation s.r.o. | Callsign: Quiet Aviation, ICAO designator changed from QNR w.e.f. 01 June 2022. | CZ | AVCODES |
| 91 | QAWC | QUALITY WAREHOUSE CO INC | | | SCAC3 |
| 92 | QAZ | Qazaq Air Joint Stock Company | IATA: IQ, Callsign: Samruk, | KZ | AVCODES |
| 93 | QB | Air Alma, Inc. | ICAO: AAJ, Callsign: Air Alma, Ceased operations on 10 january 2002. | CDN | AVCODES |
| 94 | QB | Quebecair, Inc. | | CDN | AVCODES |
| 95 | QB | Air Bisec | Name changed to Georgian National Airlines | GE | AVCODES |
| 96 | QB | Georgian National Airlines | ICAO: GFG, Callsign: Gremi, IATA Prefix: 399, Designator QB reinstated by IATA. Name changed from Air Bisec | GE | AVCODES |
| 97 | QB | Sky Georgia | ICAO: GFG, Callsign: Gremi, IATA Prefix: 399, Name changed from Georgian National Airlines. Designator QB reinstated by IATA. Name changed from Air Bisec | GE | AVCODES |
| 98 | QB | Qeshm Air | ICAO: QSM, Callsign: Qeshm Air, IATA Prefix: 237, ICAO Designator changed from IRQ. | IR | AVCODES |
| 99 | QBA | Queen Bilqis Airways | IATA: QA, Callsign: Bilqis, | YAR | AVCODES |
| 100 | QBAX | QUALITY BAKERS OF AMERICA COOPERATI | | | SCAC3 |
