Related Clues:

• Airport guesstimate
• Pilot's info, briefly
• Platonic letter
• Letter from the Corinthians
• Zeta's follower
• Theta follower
• In-flight guesstimate, for short
• Sched. abbr.
• Theta's preceder
• H lookalike
• Flight guess: Abbr.
• Eastern competitor
• Timetable abbr
• Announcement over the P.A.
• PanAm rival