Best time to fly New York to New Orleans

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

Best month

April

89.3% on time · 179 flights

Worst month

February

70.2% on time · 190 flights

Month Flights On time Cancelled When late, by
January 171 75.9% 7.6% 84 min
February 190 70.2% 6.32% 89 min
March 186 85.8% 1.61% 61 min
April 179 89.3% 0.56% 48 min
May 196 79.1% 2.55% 69 min
June 182 79.7% 2.2% 65 min
July 185 73.1% 5.41% 78 min
August 186 77.1% 3.76% 69 min
September 188 84.9% 1.06% 60 min
October 238 88.1% 0.84% 105 min
November 223 88.1% 1.79% 67 min
December 223 72.6% 3.59% 80 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.