Related Clues:

• H, as in Athens
• Sked posting
• O'Hare stat
• Airport flight info: Abbr.
• Letter from Greece?
• Airport announcement
• Flying letters
• SFO posting
• Socratic "H"
• Socratic H
• JFK datum
• Aristotle's H
• 11-Across posting
• In-flight info: Abbr.
• Airport info.