Old Jul 22, 14, 9:15 am
Join Date: Apr 2006
Location: High Point, NC
Programs: None
Posts: 9,170
Except taxi out and in tend to remain relatively steady year around, with the one exception being deicing in the winter for northern hubs, but even then there aren't so many snow days to make that much difference. Plus taxi out/in isn't affected by direction of flight.

The big factor is winds aloft which changes the schedule due to longer/shorter flight times twice a year - spring and fall.

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