Best time to fly Miami to Dallas/Fort Worth

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

Best month

February

82% on time · 357 flights

Worst month

July

61.6% on time · 412 flights

Month Flights On time Cancelled When late, by
January 435 74.2% 9.66% 113 min
February 357 82% 0.28% 64 min
March 405 74.6% 3.21% 71 min
April 378 71% 0.79% 75 min
May 398 74.2% 3.02% 93 min
June 383 74.6% 3.66% 70 min
July 412 61.6% 2.91% 88 min
August 418 62.8% 3.11% 69 min
September 404 75.8% 3.22% 76 min
October 414 74.5% 0.72% 89 min
November 420 72.1% 1.43% 61 min
December 401 80.9% 0.75% 63 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.