Best time to fly Nashville to Buffalo

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

Best month

January

92.3% on time · 41 flights

Worst month

June

48.3% on time · 60 flights

Month Flights On time Cancelled When late, by
January 41 92.3% 4.88% 50 min
February 45 88.9% 0% 74 min
March 60 83.3% 0% 74 min
April 60 78% 1.67% 40 min
May 62 69.4% 0% 66 min
June 60 48.3% 0% 42 min
July 62 80.6% 0% 56 min
August 62 91.9% 0% 26 min
September 60 88.3% 0% 45 min
October 62 87.1% 0% 35 min
November 51 88.2% 0% 68 min
December 49 85.1% 2.04% 36 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.