Best time to fly Norfolk to Miami

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

Best month

September

93.3% on time · 30 flights

Worst month

January

74.6% on time · 62 flights

Month Flights On time Cancelled When late, by
January 62 74.6% 4.84% 99 min
February 56 87.5% 0% 98 min
March 62 85.2% 1.61% 66 min
April 60 86.7% 0% 28 min
May 62 85.2% 0% 99 min
June 58 77.2% 0% 110 min
July 35 88.2% 2.86% 118 min
August 36 80.6% 0% 131 min
September 30 93.3% 0% 20 min
October 31 90.3% 0% 178 min
November 58 87.3% 5.17% 173 min
December 61 82% 0% 81 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.