| 1 | QN | Royal Aviation, Inc. | ICAO: ROY, IATA Prefix: 498, Merged in Canada 3000 | CDN | AVCODES |
| 2 | QN | Air Outre Mer | ICAO: AOM, Name changed to AOM | F | AVCODES |
| 3 | QN | Ord Air Charter Ply. Ltd. | IATA designator changed to RF* | AUS | AVCODES |
| 4 | QN | Bush Pilots Airways Ltd. | | AUS | AVCODES |
| 5 | QN | Air Armenia CJSC | ICAO: ARR, Callsign: Air Armenia, IATA Prefix: 907, Ceased operations on 29 October 2014. | AM | AVCODES |
| 6 | QN | Kabo Airlines Limited | ICAO: QNK, Callsign: Quebec November, ICAO callsign changed to Kabo | WAN | AVCODES |
| 7 | QN | Kabo Airlines Limited | ICAO: QNK, Callsign: Kabo, ICAO callsign changed from Quebec November | WAN | AVCODES |
| 8 | QN | Skytrans Regional Pty Ltd t/a Skytrans Airlines | ICAO: SKP, Callsign: Skytrans, Designator Q6 recalled by IATA | AUS | AVCODES |
| 9 | QNA | Queen Air | IATA: 5G, Callsign: Queen Air, IATA designator changed from 7Q* | DOM | AVCODES |
| 10 | QNA | Queen Air | IATA: 7Q, Callsign: Queen Air, IATA designator changed to 5G | DOM | AVCODES |
| 11 | QNA | Aeronaves Queen S.A. (Queen Air) | IATA: OQ, Callsign: Queen Air, | DOM | AVCODES |
| 12 | QNA | Queen Air | | | ICAO1 |
| 13 | QNAU | QINETIQ NORTH AMERICA | | | SCAC4 |
| 14 | QNCD | QUIRION, CLAUDE | | | SCAC4 |
| 15 | QNCO | QUEST & CO INC | | | SCAC3 |
| 16 | QNET | QUEEN CITY SAUSAGE AND PROVISION IN | | | SCAC4 |
| 17 | QNGF | Q-LINE TRUCKING LTD | | | SCAC4 |
| 18 | QNK | Kabo Airlines Limited | IATA: N2, Callsign: Kabo, Designator N2* recalled by IATA | WAN | AVCODES |
| 19 | QNK | Kabo Airlines Limited | IATA: N9, Callsign: Kabo, Operations suspended. Designator N2* recalled by IATA | WAN | AVCODES |
| 20 | QNK | Kabo Airlines Limited | IATA: QN, Callsign: Quebec November, ICAO callsign changed to Kabo | WAN | AVCODES |
| 21 | QNK | Kabo Airlines Limited | IATA: QN, Callsign: Kabo, ICAO callsign changed from Quebec November | WAN | AVCODES |
| 22 | QNK | Kabo Air | IATA: N2 | | ICAO1 |
| 23 | QNKS | QUEEN A/S | | | SCAC3 |
| 24 | QNLB | QUESNEL, BERNARD | | | SCAC4 |
| 25 | QNLI | QUINN LINES INC | | | SCAC3 |
| 26 | QNLU | QATAR NAVIGATION (QSC) | | Q | BIC |
| 27 | QNLU | UNITED ARAB SHIPPING CO SAG | | | SCAC4 |
| 28 | QNMS | QUALITY NORTH AMERICAN MOVING AND S | | | SCAC4 |
| 29 | QNNU | HAPAG LLOYD A.G | | D | BIC |
| 30 | QNNU | QATAR NATIONAL NAVIG & TRANSPORT CO | | | SCAC4 |
| 31 | QNR | Queen Air s.r.o. | Callsign: Queen Air, ICAO designator changed to QAV w.e.f. 01 June 2022. | CZ | AVCODES |
| 32 | QNSL | QUEBEC NORTH SHORE & LABRADOR RWY | | | PWRC |
| 33 | QNSL | Québec North Shore and Labrador Railway | | CDN | TRAFFIC |
| 34 | QNSX | Rail Enterprises Inc. dba Quebec North Shore and Labrador Railway | | | RSRV |
| 35 | QNT | Limited Liability Company Qanot Sharq | IATA: HH, Callsign: Qanot Sharq, | UZ | AVCODES |
| 36 | QNT | Qanot Sharq | | | ICAO1 |
| 37 | QNTA | QUINTANA, JORGE ABEL | | | SCAC4 |
| 38 | QNTG | QUINTERO TRUCKING (MX-462095) | | | SCAC4 |
| 39 | QNTL | QUINTE TRANSPORT 1986 LIMITED | | | SCAC3 |
| 40 | QNTN | QUINTON EXPRESS | | | SCAC4 |
| 41 | QNTO | QUINTON, STEVEN | | | SCAC4 |
| 42 | QNTP | QUEEN TRANSPORT INC | | | SCAC4 |
| 43 | QNTR | QUINTERO TRUCKING CO | | | SCAC3 |
| 44 | QNTR | QUINTERO TRUCKING CO | | | SCAC4 |
| 45 | QNTU | QUEENTAINER PTE LTD | | SGP | BIC |
| 46 | QNWS | Q N W S A DE C V | | | SCAC4 |
| 47 | QNZ | Jet Connect Ltd. | Callsign: Qantas Jetconnect, Founded on 11 June 2001. Commenced operations in October 2002. | NZ | AVCODES |
| 48 | QNZ | JetConnect | | | ICAO1 |
| 49 | QNZ | Jetconnect | Real: QNZ, QF | NZ | TRAFFIC |
