Overbooking
Outplant (off-site)
Outbound
OSI – Other Service Information
Originating carrier
Operating carrier
Open ticket
Open skies
Open jaw ticket
Open date sector
Open book
Onsite
Online transaction fee
Online or online point
Online low touch transaction
Online high touch transaction
Online Booking Tool
Online adoption
Onesto
Offline transaction (traditional transaction)
Off-peak
Off-loading
Off-line point
Off-line connections