Best time to fly Birmingham to Las Vegas

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

Best month

November

91.7% on time · 60 flights

Worst month

July

71.2% on time · 66 flights

Month Flights On time Cancelled When late, by
January 58 87.7% 1.72% 60 min
February 55 90.9% 0% 44 min
March 62 80.6% 0% 66 min
April 60 78.3% 0% 74 min
May 62 85.5% 0% 48 min
June 60 80% 0% 51 min
July 66 71.2% 0% 64 min
August 63 85.7% 0% 65 min
September 60 81.7% 0% 60 min
October 62 83.9% 0% 41 min
November 60 91.7% 0% 76 min
December 62 82.3% 0% 51 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.