Related Clues:

• Homeric H
• Abbr. on a key
• H look-alike
• Useful info at Dulles
• Cockpit dial: Abbr.
• Space bar neighbor
• Seventh Greek letter
• Airport guesstimate
• Pilot's info, briefly
• Platonic letter
• Letter from the Corinthians
• Zeta's follower
• Theta follower
• Computer keyboard key
• In-flight guesstimate, for short