Best time to fly Nashville to San Diego

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

Best month

January

87.9% on time · 72 flights

Worst month

June

50% on time · 98 flights

Month Flights On time Cancelled When late, by
January 72 87.9% 6.94% 33 min
February 71 77.1% 1.41% 57 min
March 103 81.6% 0% 45 min
April 100 65% 0% 39 min
May 101 72.7% 0.99% 40 min
June 98 50% 0% 45 min
July 88 73.9% 0% 58 min
August 78 78.2% 0% 37 min
September 77 85.5% 0% 36 min
October 88 73.3% 0% 41 min
November 85 81% 1.18% 53 min
December 91 81.1% 0% 57 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.