Airlines — J
- JCBJ C Bamford (Excavators)
- RFXJ P Hunt Air Carriers
- JLJJ-Air
- JCKJackson Air Services
- JAEJade Cargo International
- JGNJagson Airlines
- JEXJAL Express
- JAZJALways
- JAWJamahiriya Airways
- JMBJambo Africa Airlines
- JAKJana-Arka
- JAXJanair
- JACJapan Air Commuter
- JASJapan Air System
- JSVJapan Aircraft Service
- JALJapan Airlines
- JALJapan Airlines Domestic
- JAAJapan Asia Airways
- ZXYJapan Regio
- JTAJapan Transocean Air
- JATJat Airways
- JTYJatayu Airlines
- JZRJazeera Airways
- JRBJc royal.britannica
- JDAJDAviation
- JDPJDP Lux
- JJAJeju Air
- JNYJenney Beechcraft
- XLDJeppesen Data Plan
- JPNJeppesen UK
- JEAJet Air
- JSIJet Air Group
- JAIJet Airways
- JTXJet Aspen Air Lines
- PJSJet Aviation
- BZFJet Aviation Business Jets
- JCFJet Center Flight Training
- JCTJet Charter
- JCXJet Connection
- DWWJet Courier Service
- JEDJet East International
- JEIJet Executive International Charter
- RZAJet Fighter Flights
- CFTJet Freighters
- JGDJet G&D Aviation
- MJLJet Line International
- JEKJet Link
- HTLJet Link Aviation
- JNRJet Norte
- JRNJet Rent
- JDIJet Service
- JSMJet Stream
- RSPJet Suite
- JTCJet Trans Aviation
- JTTJet-2000
- OPSJet-Ops
- EXSJet2.com
- JFUJet4You
- OSWJetAfrica Swaziland
- JAFJetairfly
- JTLJetall Holdings
- JAGJetalliance
- JBUJetBlue Airways
- QNZJetConnect
- UEJJetcorp
- JCCJetcraft Aviation
- JXAJetex Aviation
- JEFJetflite
- JFLJetfly Airlines
- JICJetgo International
- JLXJetlink Express
- JLHJetlink Holland
- JMGJetMagic
- JNVJetnova de Aviacion Ejecutiva
- JPOJetpro
- MDJJetran Air
- JRIJetrider International
- JEJJets Ejecutivos
- JEPJets Personales
- JSEJets Y Servicios Ejecutivos
- JGOJetsGo
- JSTJetstar Airways
- JSAJetstar Asia Airways
- JJPJetstar Japan
- PICJetstar Pacific
- JSHJetstream Air
- JXTJetstream Executive Travel
- JPQJett Paqueteria
- JECJett8 Airlines Cargo
- JTGJettime
- JTOJettor Airlines
- JTNJettrain Corporation
- JWYJetways of Iowa
- JWWJetWind
- JXXJetx Airlines
- JHMJHM Cargo Expreso
- JIBJibair
- JSWJigsaw Project
- HKNJim Hankins Air Service
- RASJim Ratliff Air Service