Related Clues:

• Schedule letters
• Pi follower
• Station letters
• Part of a pilot's plan: Abbr.
• Airport approximation
• LAX letters
• Greek H
• In-flight P.A. announcement
• See 51-Down
• LAX guesstimate
• Guesstimate letters
• Capt.'s prediction
• Traveler's info
• Efficiency symbol, in physics
• Greek consonant