Possible Clues:

• Bad photographs show condition of early fliers
• Overnighter
• It often leads to an early touchdown
• Flight in which you might receive a blanket
• Flight to sleep on
• Cheap liquor that's taken by fly-by-nights?
• Late departure
• A long overnight flight
• Overnight flight (... the first two of this one.)
• Aperture set below light to stop effect from flash