Best time to fly South Bend to Washington

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full SBN to IAD 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 7 60% 28.57% 25 min
February 29 58.6% 0% 55 min
March 39 84.2% 2.56% 68 min
April 26 96.2% 0% 35 min
May 22 95.5% 0% 23 min
June 21 95.2% 0% 158 min
July 26 95.7% 11.54% 141 min
August 12 100% 0%
September 30 96.7% 0% 189 min
October 26 88.5% 0% 121 min
December 28 67.9% 0% 113 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.