Related Clues:

• Heathrow fig.
• Greek vowels
• Ticket abbr.
• Pilot's update, for short
• Zeta followers
• H look-alikes
• U.S. Airways info
• In-flight info, for short
• Ticket info
• Alphabetic seventh
• SFO info
• Traveler's abbreviation
• Seventh chapter of a fraternity
• 9:15, say, at J.F.K.
• Airport inits.