Related Clues:

• In-flight guesstimate
• Plato's seventh letter
• Capt.'s guess
• LAX board stat
• Kennedy posting: Abbr.
• Flier's concern, for short
• LAX or JFK guesstimate
• Pilot's stat
• Greek "H"
• Passengers' datum, briefly
• Posting at O'Hare: Abbr.
• Letter from abroad
• Announcement to passengers
• Forum letter
• Airport posting: Abbr.