Best time to fly Eugene to Salt Lake City

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

Best month

November

95.8% on time · 120 flights

Worst month

January

87.1% on time · 124 flights

Month Flights On time Cancelled When late, by
January 124 87.1% 0% 69 min
February 112 91.9% 0.89% 99 min
March 124 93.5% 0% 85 min
April 120 94.2% 0% 87 min
May 124 92.7% 0% 62 min
June 129 92.2% 0% 106 min
July 124 95.2% 0% 141 min
August 124 92.7% 0% 138 min
September 120 92.5% 0% 45 min
October 124 92.7% 0% 54 min
November 120 95.8% 0% 59 min
December 124 93.5% 0% 71 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.