Best time to fly Nashville to New York

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

Best month

September

89.4% on time · 144 flights

Worst month

July

60.4% on time · 124 flights

Month Flights On time Cancelled When late, by
January 110 69.8% 12.73% 48 min
February 107 80.6% 8.41% 61 min
March 125 79.3% 1.6% 56 min
April 106 82.1% 0% 52 min
May 102 86.3% 0% 53 min
June 104 68.6% 1.92% 71 min
July 124 60.4% 14.52% 71 min
August 116 82.6% 0.86% 70 min
September 144 89.4% 0% 69 min
October 157 80.4% 1.27% 76 min
November 144 72.7% 2.78% 62 min
December 131 67.2% 6.87% 82 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.