one- - outr
- one-dimensional flow
- one-eighty
- one-eighty approach
- one-engined aircraft
- one-hour fuel reserve
- one-piece stabilizer
- one-plane service
- one-spar
- one-station fixing
- one-step climb
- one-step inspection
- one-step inspection system
- one-stop charter
- one-stop flight
- one-way communication
- one-way fare
- one-way flight
- one-way rate
- one-way ticket
- onset
- onset channelizings
- onset of wind
- open air
- open cooling system
- open rate
- open ticket
- open-circuit wind tunnel
- open-date ticket
- open-end wrench
- open-jaw charter
- open-jaw fare
- open-jaw route
- open-jaw trip
- open-loop
- open-market fare
- open-rate situation
- open-return wind tunnel
- open-water area
- opened circuit
- opening
