| Abbreviation | Definition |
|---|---|
| JATE | Joint Air Transport Establishment |
| JATS | Jonesboro Area Transportation Study |
| JAX | Jacksonville International Airport |
| JBV | Jet Boat Vee |
| JCAR | Jordan Civil Aviation Regulations |
| JCRAA | Jefferson Counties Regional Airport Authority |
| JDM | Japanese Domestic Model |
| JEEP | Just Enough Essential Parts |
| JET | Joint Engine Technology |
| JFAST | Joint Flow and Analysis System for Transportation |
| JFI | Jet Flight Information |
| JFK | John F Kennedy International Airport |
| JFU | Japanese Fouler-Upper (WW II decoy aircraft type) |
| JHTA | Japan Harbor Transportation Association |
| JIC | Junk In Car |
| JIT | Just In Time |
| JJ | Junker Junkie |
| JKIA | Jomo Kenyatta International Airport |
| JL | Jet Lag |
| JLVM | Jordan Light Vehicle Manufacturing |