Related Clues:

• In-flight info, in brief
• Touchdown data
• Fraternity letters, sometimes
• Schedule guesses briefly,
• Some Greek vowels
• Passengers' concerns, briefly
• H H H, to Greeks
• LAX guesstimates
• Letters from Athens
• In-flight announcements, for short
• Airport guesses, for short
• Omicrons' preceders
• Letters that look like H
• HHH, in Athens
• Symbols used in angle measurement