Related Clues:

• Sched. 'question mark'
• Airport schedule abbr.
• Alphabetic character
• Frat letter, perhaps
• Hellenic H
• Airport guess: Abbr.
• H, to Greeks
•     Not yet scheduled, in schedules
•     Traveler's request: Abbr.
• JFK posting
• Terminal abbr.
• O'Hare abbr.
• Sched. guess
• Airline Web site stat.
• Scheduling abbr.