Best time to fly Phoenix to Missoula

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full AZA to MSO 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 24 87.5% 0% 377 min
February 19 68.4% 0% 51 min
March 35 82.9% 0% 106 min
April 28 89.3% 0% 106 min
May 19 73.7% 0% 47 min
June 22 90.9% 0% 42 min
July 29 79.3% 0% 67 min
August 18 83.3% 0% 41 min
September 15 93.3% 0% 26 min
October 26 76.9% 0% 57 min
November 29 82.8% 0% 43 min
December 36 70.6% 2.78% 69 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.