Best time to fly New York to Minneapolis

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

Best month

September

93.4% on time · 347 flights

Worst month

July

77.4% on time · 400 flights

Month Flights On time Cancelled When late, by
January 350 85.1% 2.29% 63 min
February 318 83.9% 4.09% 66 min
March 353 81.8% 3.68% 71 min
April 341 83% 0% 85 min
May 367 80.3% 0.54% 78 min
June 340 79.8% 1.47% 87 min
July 400 77.4% 3.75% 95 min
August 387 88.1% 4.39% 110 min
September 347 93.4% 0% 73 min
October 356 87.3% 0.56% 105 min
November 339 84.1% 0% 88 min
December 342 78.9% 1.46% 72 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.