Best time to fly Bend/Redmond to Seattle

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

Best month

November

89.1% on time · 157 flights

Worst month

August

80.4% on time · 196 flights

Month Flights On time Cancelled When late, by
January 137 88% 2.92% 71 min
February 124 83.6% 6.45% 40 min
March 150 87% 2.67% 87 min
April 155 86.4% 0.65% 51 min
May 162 86.3% 0.62% 61 min
June 149 87.2% 0% 57 min
July 184 84.2% 0.54% 122 min
August 196 80.4% 1.02% 49 min
September 210 85.2% 0.48% 36 min
October 163 84.6% 0.61% 60 min
November 157 89.1% 6.37% 66 min
December 152 84.7% 0.66% 61 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.