Best time to fly Nashville to Raleigh/Durham

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

Best month

November

86.1% on time · 379 flights

Worst month

June

65.3% on time · 331 flights

Month Flights On time Cancelled When late, by
January 335 85% 8.66% 49 min
February 303 85.5% 1.98% 52 min
March 360 76.1% 1.11% 57 min
April 359 77.1% 0.28% 50 min
May 364 73.8% 1.37% 47 min
June 331 65.3% 0.6% 57 min
July 375 69% 2.13% 64 min
August 365 79.4% 1.1% 77 min
September 387 84.2% 0% 74 min
October 407 76% 0.74% 56 min
November 379 86.1% 1.06% 57 min
December 370 76.9% 0.27% 58 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.