Best time to fly Bellingham to Phoenix

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full BLI to AZA 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 10 90% 0% 188 min
February 11 90.9% 0% 34 min
March 17 82.4% 0% 471 min
April 13 69.2% 0% 184 min
May 10 80% 0% 53 min
June 13 92.3% 0% 75 min
July 15 100% 0%
August 11 100% 0%
September 9 88.9% 0% 31 min
October 15 86.7% 0% 88 min
November 10 100% 0%
December 13 84.6% 0% 76 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.