Best time to fly San Francisco to Minneapolis

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full SFO to MSP record →

Best month

October

94.7% on time · 170 flights

Worst month

June

57.6% on time · 184 flights

Month Flights On time Cancelled When late, by
January 143 88% 0.7% 53 min
February 128 89% 0% 50 min
March 143 82.6% 3.5% 105 min
April 166 81.3% 0% 67 min
May 168 74.5% 1.19% 50 min
June 184 57.6% 0% 59 min
July 193 89.4% 0.52% 53 min
August 180 87.2% 0.56% 65 min
September 157 82.8% 0% 44 min
October 170 94.7% 0% 70 min
November 148 86.4% 0.68% 54 min
December 139 79.4% 2.16% 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.