Best time to fly Montgomery to Washington

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full MGM to DCA 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 44 57.9% 13.64% 199 min
February 48 38.6% 8.33% 143 min
March 53 48.1% 1.89% 94 min
April 52 64.7% 0% 61 min
May 50 53.3% 10% 169 min
June 52 52.6% 23.08% 138 min
July 52 56.8% 13.46% 113 min
August 52 58.3% 7.69% 124 min
September 52 83.3% 5.77% 43 min
October 53 67.3% 0% 71 min
November 48 68.9% 4.17% 57 min
December 31 58.6% 6.45% 72 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.