Related Clues:

• Attic letters
• Announcements to train riders, briefly
• Headwinds often push them back, briefly
• When planes are due in, for short
• Hippocratic H's
• When trains are due: Abbr
• Alien, like foreign characters
• JFK times
• Calculations made while high, for short?
• Nos. that affect connecting flights
• Data for airport chauffeurs, for short
• Airline predictions (Abbr.)
• JFK monitor displays
• Landing nos
• Flight figures, for short