Best time to fly Bangor to Washington

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

Best month

October

80.2% on time · 92 flights

Worst month

January

56.8% on time · 88 flights

Month Flights On time Cancelled When late, by
January 88 56.8% 15.91% 139 min
February 80 68.8% 3.75% 165 min
March 89 59.8% 6.74% 141 min
April 89 75.3% 0% 110 min
May 108 79.4% 0.93% 65 min
June 115 69.6% 10.43% 154 min
July 92 62.7% 9.78% 123 min
August 93 72.2% 3.23% 50 min
September 90 71.9% 1.11% 70 min
October 92 80.2% 1.09% 48 min
November 88 64% 2.27% 60 min
December 87 67.1% 11.49% 92 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.