While at the airport trying to figure out which plane the body could have came from Logan and Barek determine that her body must have been stashed in the wheel well of a cargo plane headed for Iceland. However the air traffic control supervisor said the plane departed JFK at 3:10 AM and had to turn back six minutes after takeoff due to a wing elevator malfunction. When the surfers find the body the sun is already well above the horizon, even at the start of summer the time would have been 6:00 AM at the earliest, but the plane would have landed well before sunrise. A plane making an unscheduled landing might have been put in a holding pattern until a runway could be cleared, but with a wing malfunction they wouldn't have had to wait long, it would have been back on the ground well before 4 AM.
When they visit the NY TRACON ( Terminal Radar Control) facility in Westbury NY, they are standing by a window with airliners parked outside. The TRACON in Westbury is actually a windowless facility not near any airport.