Best time to fly Rapid City to Dallas/Fort Worth

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

Best month

October

90.5% on time · 190 flights

Worst month

April

70.9% on time · 144 flights

Month Flights On time Cancelled When late, by
January 130 82.5% 7.69% 119 min
February 112 86.2% 1.79% 57 min
March 124 89.3% 1.61% 69 min
April 144 70.9% 1.39% 88 min
May 193 81% 3.63% 112 min
June 236 78.2% 2.12% 67 min
July 249 75.1% 0.4% 54 min
August 226 82.1% 0.44% 74 min
September 210 85.6% 0.48% 66 min
October 190 90.5% 0.53% 45 min
November 132 84% 0.76% 63 min
December 153 77.8% 0% 131 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.