Best time to fly Norfolk to New York

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

Best month

September

91.5% on time · 60 flights

Worst month

June

57.4% on time · 54 flights

Month Flights On time Cancelled When late, by
January 67 82% 8.96% 37 min
February 57 80.8% 8.77% 64 min
March 62 83.9% 0% 95 min
April 59 88.1% 0% 54 min
May 51 84% 1.96% 49 min
June 54 57.4% 12.96% 96 min
July 62 77.1% 22.58% 140 min
August 62 88.3% 3.23% 55 min
September 60 91.5% 1.67% 61 min
October 62 85.2% 1.61% 109 min
November 60 86.8% 11.67% 34 min
December 75 72.6% 2.67% 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.