Best time to fly Medford to Portland

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full MFR to PDX 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 69.6% 8% 109 min
February 21 95% 4.76% 27 min
March 23 86.4% 4.35% 68 min
April 33 87.9% 0% 50 min
May 53 90.4% 1.89% 93 min
June 41 87.8% 0% 24 min
October 26 92.3% 0% 107 min
November 10 100% 10%
December 8 57.1% 12.5% 115 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.