Best time to fly San Antonio to New York

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full SAT to JFK record →

There is not yet enough of the year on record for this route to say anything about seasons. The months below are shown as recorded.

Month Flights On time Cancelled When late, by
January 30 85.2% 10% 143 min
February 28 73.1% 7.14% 54 min
March 31 85.2% 12.9% 180 min
April 30 96.7% 0% 503 min
May 31 90.3% 0% 23 min
June 30 60% 0% 78 min
July 31 53.3% 0% 85 min
August 31 87.1% 0% 100 min
September 30 89.7% 0% 85 min
October 31 83.9% 0% 181 min
November 30 82.8% 3.33% 54 min
December 29 76.9% 6.9% 213 min

What a seasonal pattern can and cannot tell you

Months differ for reasons that repeat — summer thunderstorms in the American interior, winter fog and de-icing in northern Europe, school holidays filling every seat and leaving no slack in the schedule. Those are real and they come back each year.

What the pattern cannot do is forecast a particular flight. A quiet month has late days and a bad month has punctual ones. Treat this as a way to choose between two dates you are indifferent about, not as a promise.