Best time to fly Fort Myers to Boston

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

Best month

August

85.6% on time · 119 flights

Worst month

March

60.8% on time · 326 flights

Month Flights On time Cancelled When late, by
January 179 69% 6.15% 80 min
February 239 63.6% 9.21% 79 min
March 326 60.8% 3.07% 91 min
April 299 73.7% 0.67% 83 min
May 186 77.4% 0% 58 min
June 105 84.6% 0.95% 54 min
July 153 66% 3.92% 83 min
August 119 85.6% 0.84% 71 min
September 109 68.8% 0% 102 min
October 127 64% 1.57% 74 min
November 181 78.7% 1.66% 130 min
December 231 67.3% 2.16% 77 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.