Originally Posted by
sokolov
I hear you, but that congestion is the same whatever direction you come from.
Sorry... it is not that simple.
Congestion and flight times are a result of many factors. Not just the direction of flight.
Though you answered about EWR afternoon congestion, there is also congestion from the originating flight, and the actual path that each plane will be assigned to fly. Unlike a railroad, ,planes usually do not fly the same path each time.
They block time based on many factors - with I would guess, a heavy emphasis on historical data.