Best time to fly Bismarck/Mandan to Las Vegas

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

There is not yet enough of the year on record for this route to say anything about seasons. The months below are shown as recorded.

Month Flights On time Cancelled When late, by
January 17 64.7% 0% 147 min
February 19 84.2% 0% 57 min
March 29 82.8% 0% 35 min
April 18 100% 0%
May 18 83.3% 0% 55 min
June 17 88.2% 0% 85 min
July 22 68.2% 0% 111 min
August 20 95% 0% 64 min
September 17 82.4% 0% 56 min
October 18 61.1% 0% 64 min
November 19 78.9% 0% 35 min
December 33 81.3% 3.03% 101 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.