Best time to fly San Francisco to North Bend/Coos Bay

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

Best month

January

91.2% on time · 35 flights

Worst month

June

57.6% on time · 60 flights

Month Flights On time Cancelled When late, by
January 35 91.2% 0% 138 min
February 32 76.7% 3.13% 108 min
March 37 83.3% 0% 32 min
April 60 71.9% 3.33% 40 min
May 62 74.2% 0% 56 min
June 60 57.6% 0% 44 min
July 62 70.5% 0% 66 min
August 62 67.7% 0% 55 min
September 60 73.3% 0% 33 min
October 60 75.9% 0% 66 min
November 47 81.8% 2.13% 43 min
December 41 78% 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.