Best time to fly Portland to Medford

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full PDX to MFR 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 25 77.3% 8% 123 min
February 21 95.2% 0% 16 min
March 24 91.3% 4.17% 24 min
April 33 97% 0% 21 min
May 54 88.7% 1.85% 76 min
June 39 89.7% 0% 17 min
October 26 80% 0% 22 min
November 10 100% 10%
December 8 57.1% 12.5% 123 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.