Best time to fly Philadelphia to Cincinnati

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

Best month

April

90.9% on time · 132 flights

Worst month

July

51.5% on time · 73 flights

Month Flights On time Cancelled When late, by
January 89 78.8% 8.99% 108 min
February 55 76.5% 7.27% 54 min
March 100 79.8% 6% 119 min
April 132 90.9% 0% 76 min
May 137 79.3% 1.46% 86 min
June 137 77.1% 3.65% 115 min
July 73 51.5% 8.22% 97 min
August 81 75.3% 0% 81 min
September 64 87.5% 0% 85 min
October 135 83% 0% 133 min
November 82 72.8% 1.22% 66 min
December 99 55.8% 4.04% 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.