Best time to fly Philadelphia to Norfolk

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

Best month

October

84% on time · 188 flights

Worst month

July

54.4% on time · 162 flights

Month Flights On time Cancelled When late, by
January 105 83.7% 6.67% 149 min
February 109 63.1% 5.5% 83 min
March 117 72.3% 4.27% 87 min
April 142 70.2% 0% 95 min
May 181 72.5% 1.66% 86 min
June 176 62.6% 2.84% 94 min
July 162 54.4% 9.26% 152 min
August 156 74.3% 2.56% 113 min
September 190 77.7% 1.05% 76 min
October 188 84% 0% 61 min
November 113 78.4% 1.77% 83 min
December 82 65.4% 1.22% 76 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.