Related Clues:

• Airport posting
• Zeta-theta connection
• Platonic letter?
• SAS listing: Abbr.
• Campus letter
• Honor society letter
• H, to Herodotus
• Seventh letter of the Greek alphabet
• Part of a flight plan
• Version of a song: Abbr.
• Airline's best guess (Abbr.)
• Announcement before the listing of flight connections: Abbr.
• H-shaped letter
• Sched. listing
• The 'A' in E.T.A.: Abbr.