Best time to fly Washington to Newark

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full DCA to EWR 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 64 93% 10.94% 74 min
February 71 95.2% 12.68% 53 min
March 88 90.9% 0% 151 min
April 62 88.7% 0% 60 min
May 59 80.4% 5.08% 95 min
June 54 92.5% 1.85% 58 min
July 1 100% 0%
August 5 60% 0% 93 min
September 8 100% 0%
October 49 85.7% 0% 62 min
November 61 88.5% 0% 75 min
December 62 93.3% 3.23% 41 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.