| 1 | 3A | Kenosha Aero. Inc. d/b/a Alliance Airlines | IATA Prefix: 317, | USA | AVCODES |
| 2 | 3A | Mafira Air Charter Services SDN BHD | | MAL | AVCODES |
| 3 | 3A | Air Commuter | Designator 3A recalled by IATA | GB | AVCODES |
| 4 | 3A | Chu Kong Passanger Transport Co. Ltd. | | HK | AVCODES |
| 5 | 3B | Job Air s.r.o. (Central Connect Airlines) | ICAO: JBR, Callsign: Jobair, Ceased operations on 30 June 2014. Part of the Central Connect Group. | CZ | AVCODES |
| 6 | 3B | Aviones de Oriente, C.A. (AVIOR) | ICAO: ROI, Callsign: Avior, Designator 3B reinstated by IATA | YV | AVCODES |
| 7 | 3B | Alisea Airlines S.p.A. | ICAO: BBG, Callsign: Bravo Bravo Golf, ICAO callsign changed to Alisea | I | AVCODES |
| 8 | 3B | Alisea Airlines S.p.A. | ICAO: BBG, Callsign: Alisea, ICAO callsign changed from Bravo Bravo Golf | I | AVCODES |
| 9 | 3B | Burkina Airlines | ICAO: BFR, Callsign: Burklines, | BF | AVCODES |
| 10 | 3B | Central Charter Airlines, A.S. (Central Connect Airlines) | ICAO: CCG, Callsign: Central Charter, IATA designator changed to CQ. Part of the Central Connect Group. | CZ | AVCODES |
| 11 | 3B | Binter Cabo Verde | ICAO: NTB, Callsign: Morabeza, Name changed to Transportes Interilhas de Cabo Verde, Sociedade Unipessoal, SA. TICV | CV | AVCODES |
| 12 | 3B | Transportes Interilhas de Cabo Verde, Sociedade Unipessoal, SA. TICV | ICAO: NTB, Callsign: Morabeza, ICAO designator changed to BCV. ICAO callsign changed to Morabest. Name changed from Binter Cabo Verde | CV | AVCODES |
| 13 | 3B | Transportes Interilhas de Cabo Verde, Sociedade Unipessoal, SA. TICV | ICAO: BCV, Callsign: Morabest, ICAO designator changed from NTB. ICAO callsign changed from Morabeza. Name changed from Binter Cabo Verde | CV | AVCODES |
| 14 | 3C | Corporate Airlines | ICAO: CEA, Callsign: Corp-X, IATA Prefix: 310, Ceased operations. | USA | AVCODES |
| 15 | 3C | Deccan Cargo & Express Logistics Pvt Ltd | ICAO: DEC, Callsign: Deccan Cargo, IATA Prefix: 360, | IND | AVCODES |
| 16 | 3C | Calima Aviación S.L. | ICAO: CMV, Callsign: Calima, | E | AVCODES |
| 17 | 3C | Air Chathams Limited t/a Air Chathams | ICAO: CVA, Callsign: Chatham, IATA designator changed from CV*. | NZ | AVCODES |
| 18 | 3D | Denim Air | ICAO: DNM, Callsign: Denim, IATA designator changed to 3D | NL | AVCODES |
| 19 | 3D | Air People International Co. Ltd. | ICAO: APG, Callsign: Air People, | T | AVCODES |
| 20 | 3D | Denim Air | ICAO: DNM, Callsign: Denim, Ceased operations. IATA designator changed from 3D* | NL | AVCODES |
| 21 | 3D | Dokasch GmBH | Non-Airline Unit Load Devices (ULD) company | D | AVCODES |
| 22 | 3E | Air Bretagne | ICAO: BRE, Callsign: Bretagne, Filed for bankruptcy 12/2001 | F | AVCODES |
| 23 | 3E | Northwesrtern Air Lease Ltd. | | CDN | AVCODES |
| 24 | 3E | East Asia Airlines Limited | ICAO: EMU, | MAC | AVCODES |
| 25 | 3E | Multi-Aero, Inc. | ICAO: WBR, Callsign: Weber, Name changed to Multi-Aero, Inc. d/b/a Air Choice One. ICAO designator changed from GTW. ICAO Callsign changed from Gateway. | USA | AVCODES |
| 26 | 3E | Multi-Aero, Inc. d/b/a Air Choice One | ICAO: WBR, Callsign: Weber, ICAO designator changed to ACO w.e.f. 01 Febraury 2019. Name changed from Multi-Aero, Inc. | USA | AVCODES |
| 27 | 3E | Multi-Aero, Inc. d/b/a Air Choice One | ICAO: ACO, Callsign: Weber, ICAO designator changed from WBR w.e.f. 01 Febraury 2019. Name changed from Multi-Aero, Inc. Merged into Southern Airways Express (9X/FDY). | USA | AVCODES |
| 28 | 3F | Pacific Airways, Inc. | | USA | AVCODES |
| 29 | 3F | Air Norterra Inc, d/b/a Canadian North | IATA designator changed to 5T | CDN | AVCODES |
| 30 | 3F | First American Railways, Inc. | Railway Service | USA | AVCODES |
| 31 | 3F | Gulf Pearl Airlines | | LAR | AVCODES |
| 32 | 3F | FLYONE Armenia | ICAO: FIE, Callsign: Armrider, IATA Prefix: 379, AOC obtained 27/10/2021. | AM | AVCODES |
| 33 | 3G | Atlant-Soyuz Airlines | ICAO: AYZ, Callsign: Atlant-Soyuz, IATA Prefix: 411, IATA designator changed to 7B w.e.f. 01 November 2008 | RUS | AVCODES |
| 34 | 3G | Gading Sari Aviation Services Sdn Bhd d/b/a G Sari | ICAO: GSB, Callsign: Gading Sari, IATA Prefix: 380, Name changed to DRB-HICOM AsiaCargo Express Sdn. Bhd. ICAO Designator changed to CXM | MAL | AVCODES |
| 35 | 3G | Gambia Bird Airlines | ICAO: GBQ, Callsign: Gambia Bird, IATA Prefix: 213, Commenced operations on 22 October 2012. Ceased all operations in December 2014. Aircraft wet leased from Gemania. Main share holder Germania Express | WAG | AVCODES |
| 36 | 3G | DRB-HICOM Asiacargo Express Sdn. Bhd. | ICAO: CXM, Callsign: Asia Cargo, IATA Prefix: 380, Name changed to World Cargo Airlines. Name changed from Gading Sari Aviation Services Sdn Bhd d/b/a G Sari. | MAL | AVCODES |
| 37 | 3G | World Cargo Airlines Sdn. Bhd. | ICAO: WCM, Callsign: World Cargo, IATA Prefix: 380, Name changed from DRB-HICOM Asiacargo Express Sdn. Bhd. and previously from POS Asia Cargo Express Sdn. Bhd. d/b/a Asia Cargo Express and Gading Sari Aviation Services Sdn Bhd d/b/a G Sari. | MAL | AVCODES |
| 38 | 3G | POS Asiacargo Express Sdn. Bhd. d/b/a Asiacargo Express | ICAO: CXM, Callsign: Asia Cargo, IATA Prefix: 380, Name changed to World Cargo Airlines. Name changed from DRB-HICOM Asiacargo Express Sdn. Bhd. t/a Asiacargo Express and previoualy from Gading Sari Aviation Services Sdn Bhd d/b/a G Sari. | MAL | AVCODES |
| 39 | 3H | Air Inuit (1985) Ltd. | ICAO: AIE, Callsign: Air Inuit, Name changed to Air Inuit Ltd/Ltee. | CDN | AVCODES |
| 40 | 3H | Hapag-Lloyd Executive GmbH | ICAO: HLX, Callsign: Excellence, Designator 3H* recalled by IATA | D | AVCODES |
| 41 | 3H | Air Inuit Ltd/Ltee. | ICAO: AIE, Callsign: Air Inuit, ICAO callsign changed to Inuit. Name changed from Air Inuit (1985) Ltd. | CDN | AVCODES |
| 42 | 3H | Air Inuit Ltd/Ltee. | ICAO: AIE, Callsign: Inuit, ICAO callsign changed from Air Inuit. Name changed from Air Inuit (1985) Ltd. | CDN | AVCODES |
| 43 | 3I | Aerolineas Austral Chile S.A. | IATA Prefix: 393, | RCH | AVCODES |
| 44 | 3I | AirComet Chile | ICAO: DLU, Callsign: Bluecomet, Founded on 06 December 2004 as Southern Airlines. Ceased operations on 31 October 2008 and filled for bankruptcy protection on 18/12/2008. Name changed to Air Comet Chile in September 2007. | RCH | AVCODES |
| 45 | 3I | Airlift Service Ltd | ICAO: LFM, Callsign: Lift Air, Founded in 2008. Ceased operations in 2010 | MK | AVCODES |
| 46 | 3I | Pison Airways Limited | ICAO: KWA, Callsign: Akwaaba Air, Ceased operations. | GH | AVCODES |
| 47 | 3J | Air Alliance, Inc. | ICAO: AAQ, Callsign: Liaison, Air Canada Connector | CDN | AVCODES |
| 48 | 3J | Zip Air, Inc. | ICAO: WZP, Callsign: Wind Zip, New low cost subsidiary of Air Canada. ICAO Callsign changed to Zipper. Name changed from 3701379 Canada, Inc. | CDN | AVCODES |
| 49 | 3J | Zip Air, Inc. | ICAO: WZP, Callsign: Zipper, Ceased operations. New low cost subsidiary of Air Canada. ICAO Callsign changed from Wind Zip. Name changed from 3701379 Canada, Inc. | CDN | AVCODES |
| 50 | 3J | Jubba Airways Limited d/b/a Jubba Airways | ICAO: JUB, Callsign: Jubba, IATA Prefix: 535, IATA designator changed from 3O* | SO | AVCODES |
| 51 | 3J | Cargo Three Inc. d/b/a Pan Air Cargo | ICAO: CTW, Callsign: Third Cargo, IATA Prefix: 333, IATA Designator changed from I3*. IATA Prefix code changed from 714. | PA | AVCODES |
| 52 | 3K | Tatonduk Outfitters Ltd. d/b/a Air Cargo Express | ICAO: FXG, Callsign: Cargo Express, Name changed to Tatonduk Outfitters Ltd. d/b/a Everts Air Alaska / Everts Air Cargo | USA | AVCODES |
| 53 | 3K | Tatonduk Outfitters Ltd. d/b/a Everts Air Alaska / Everts Air Cargo | ICAO: VTS, Callsign: Everts, IATA Prefix: 029, Name changed to Tatonduk Outfitters Ltd. d/b/a Everts Air. Name changed from Tatonduk Outfitters Ltd. d/b/a Air Cargo Express | USA | AVCODES |
| 54 | 3K | Tatonduk Outfitters Ltd. d/b/a Everts Air | ICAO: VTS, Callsign: Everts, IATA Prefix: 029, IATA Desigantor changed to 3Z. Name changed from Tatonduk Outfitters Ltd. d/b/a Everts Air Alaska / Everts Air Cargo. Name changed from Tatonduk Outfitters Ltd. d/b/a Air Cargo Express | USA | AVCODES |
| 55 | 3K | Jetstar Asia Airways Pte Ltd | ICAO: JSA, Callsign: Jetstar Asia, IATA Prefix: 375, | SGP | AVCODES |
| 56 | 3L | Africa West | ICAO: WTA, Callsign: West Togo, IATA Prefix: 858, Designator 3L* recalled by IATA | TG | AVCODES |
| 57 | 3L | Intersky Luftfahrt GmbH | ICAO: ISK, Callsign: Intersky, IATA Prefix: 576, Designator 3L recalled by IATA | A | AVCODES |
| 58 | 3L | Scenic Airlines, Inc. | Designator 3L recalled by IATA | USA | AVCODES |
| 59 | 3L | Intersky Luftfahrt GmbH | ICAO: ISK, Callsign: Intersky, Filed for bankruptcy and ceased operations on 09 November 2015. Designator 3L reinstated by IATA | A | AVCODES |
| 60 | 3L | Air Arabia Abu Dhabi | ICAO: ADY, Callsign: Nawras, IATA Prefix: 049, AOC granted 23 April 2020. | UAE | AVCODES |
| 61 | 3M | Gulfstream International Airlines, Inc. | ICAO: GFT, Callsign: Gulf Flight, IATA Prefix: 449, | USA | AVCODES |
| 62 | 3M | Silver Airways LLC | ICAO: SIL, Callsign: Silver Wings, IATA Prefix: 449, Name changed to Silver Airways Corp. Formed from the bankrupt assets of Gulfstream International Airlines. | USA | AVCODES |
| 63 | 3M | Silver Airways Corp. | ICAO: SIL, Callsign: Silver Wings, IATA Prefix: 449, Name changed from Silver Airways LLC. Formed from the bankrupt assets of Gulfstream International Airlines. | USA | AVCODES |
| 64 | 3N | Air Urga | ICAO: URG, Callsign: Urga, IATA Prefix: 746, | UA | AVCODES |
| 65 | 3N | Airvantage Incorporated | ICAO: AVV, Callsign: Airvantage, Designator 3N recalled by IATA | USA | AVCODES |
| 66 | 3O | Jubba Airways Limited d/b/a Jubba Airways | ICAO: JUB, Callsign: Jubba, IATA designator changed to 6J | SO | AVCODES |
| 67 | 3O | Peau Vava'u Limited t/a Peau Vava'u | ICAO: PVU, Callsign: Peau, Ceased operations. | TO | AVCODES |
| 68 | 3O | Air Arabia Maroc | ICAO: MAC, Callsign: Nawras, IATA Prefix: 452, ICAO callsign changed to Arabia Maroc | MA | AVCODES |
| 69 | 3O | Air Arabia Maroc | ICAO: MAC, Callsign: Arabia Maroc, IATA Prefix: 452, ICAO callsign changed from Nawras | MA | AVCODES |
| 70 | 3P | Inter Tropical Aviation | ICAO: TCU, Callsign: Tropair, | SME | AVCODES |
| 71 | 3P | Georgian Airlines | ICAO: GEG, Callsign: Demuri, Merged into Air Georgia DA | GE | AVCODES |
| 72 | 3P | Thai Pacific Airlines Business Company Ltd. | ICAO: TPV, Callsign: Thai Pacific, | T | AVCODES |
| 73 | 3P | Tiara Air N.V. dba Tiara Air Aruba | ICAO: TNM, Callsign: Tiara, IATA Prefix: 253, Declared bankrupt on 28 November 2016. | ARU | AVCODES |
| 74 | 3P | Air Philip | ICAO: APV, Callsign: Philip Air, Ceased operations on 13 March 2019. Founded in December 2016. Commenced operations on 30 June 2018. | ROK | AVCODES |
| 75 | 3P | World 2 Fly Portugal, S.A. | ICAO: WPT, Callsign: New Blue, | P | AVCODES |
| 76 | 3Q | China Yunnan Airlines | ICAO: CYH, Callsign: Yunnan, IATA Prefix: 592, Founded in 1992, Merged into China Eastern Airlines in 2003. | PRC | AVCODES |
| 77 | 3Q | Carib Aviation Limited | ICAO: DEL, Callsign: Red Tail, Founded in 1972. Ceased operations on 30 September 2008. IATA designator changed from 6C | AG | AVCODES |
| 78 | 3Q | KC International Airlines Co., Ltd. d/b/a KC International Airlines | ICAO: KCH, Callsign: Cam Air, Due to commence in 2018 | K | AVCODES |
| 79 | 3Q | Royal Air Charters | ICAO: RAC, Designator 3Q recalled by IATA. | Z | AVCODES |
| 80 | 3R | Gromov Flight Research Institute Airline | {ICAO: GAI, Callsign: Gromov Airline, IATA Prefix: 520, Name changed to Joint Stock Company "Moskovia Airlines". Designator 3R reinstated by IATA};SRCKEY=AVCODES | RUS | |
| 81 | 3R | Avia Air N.V. | ICAO: ARB, Callsign: Aviair, Ceased operations. IATA designator changed from 8R* | ARU | AVCODES |
| 82 | 3R | Air Moldova International, S.A. | ICAO: MLV, IATA designator changed to RM | MD | AVCODES |
| 83 | 3R | Aerolineas Regionales, S.A. de C.V. | ICAO: RCQ, IATA Prefix: 720, | MEX | AVCODES |
| 84 | 3R | Joint Stock Company "Moskovia Airlines" | ICAO: GAI, Callsign: Gromov Airline, IATA Prefix: 520, Name changed from Gromov Flight Research Institute Airline. Designator 3R reinstated by IATA | RUS | AVCODES |
| 85 | 3R | Divi Divi Air NV | ICAO: DVR, Callsign: Divi Air, | NA | AVCODES |
| 86 | 3R | Avior Regional, C.A. | ICAO: RGR, Callsign: Avior Regional, Designator 9V recalled by IATA | YV | AVCODES |
| 87 | 3S | Tashkent Aircraft Production Corporation | ICAO: CTP, Callsign: Cortas, IATA designator changed from PQ*, then to 4C* | UZ | AVCODES |
| 88 | 3S | Shuswap Air | ICAO: SFC, Callsign: Shuswap, Designator 3S recalled by IATA | CDN | AVCODES |
| 89 | 3S | Air Guyane S.P. | ICAO: GUY, Name changed to CAIRE d/b/a Air Antilles Express w.e.f. June 2009. | GUY | AVCODES |
| 90 | 3S | Shun Tak-China Travel Ship Mgmt. Ltd. | Ferry Service | HK | AVCODES |
| 91 | 3S | Aeroland Airways S.A. | ICAO: AEN, IATA Prefix: 207, | GR | AVCODES |
| 92 | 3S | CAIRE d/b/a Air Antilles | ICAO: GUY, Callsign: Green Bird, Name changed from Air Guyane S.P. w.e.f. June 2009. | GUY | AVCODES |
| 93 | 3S | AeroLogic GmbH | ICAO: BOX, Callsign: German Cargo, IATA Prefix: 278, AeroLogic is jointly owned by Deutsche Lufthansa AG and Deutsche Post AG through their subsidiaries Lufthansa Cargo and DHL Express, each with 50 percent shares. | D | AVCODES |
| 94 | 3T | Turan Air Airline Company | ICAO: URN, Callsign: Turan, IATA Prefix: 359, Ceased operations in 2013. | AZ | AVCODES |
| 95 | 3T | American Trans Air, Inc. | ICAO: AMT, Callsign: AmTran, IATA Designator changed to TZ | USA | AVCODES |
| 96 | 3T | Tarco Air | ICAO: TRQ, Callsign: Airtarco, Established in 2009. Name changed to Tarco Aviation. ICAO designator changed to TQQ. ICAO callsign changed to Aviation Tarco. | SUD | AVCODES |
| 97 | 3T | Tarco Aviation Company Limited | ICAO: TQQ, Callsign: Aviation Tarco, Established in 2009. Name changed from Tarco Air. ICAO desigantor changed from TRQ. ICAO callsign changed from Airtarco. | SUD | AVCODES |
| 98 | 3U | Chanchangi Airlines Nigeria Limited | ICAO: NCH, Callsign: Chanchangi, Designator 3U* recalled by IATA | WAN | AVCODES |
| 99 | 3U | Air Cargo Carriers, Inc. | ICAO: SNC, Callsign: Night Cargo, Designator 3U* recalled by IATA | USA | AVCODES |
| 100 | 3U | Air Cargo Carriers, Inc. | ICAO: SNC, Callsign: Night Cargo, IATA designator changed to 2Q. Designator 3U* reinstated by IATA | USA | AVCODES |
