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On-line connection
Open jaw
Open ticket
Outbound
Overbook
Oversell
PAX
PIL
PNR
Published fare
Record locator
Red eye
Revalidation sticker
Rmks
Roundtrip
Routing
SC
Segment
Short haul
Shoulder season
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Air Travel Glossary (on - sh)
By Arlene Fleming, About.com
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