Best time to fly Detroit to Milwaukee

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

Best month

October

90.5% on time · 274 flights

Worst month

December

60.2% on time · 258 flights

Month Flights On time Cancelled When late, by
January 200 68.7% 1% 76 min
February 185 74.1% 0% 71 min
March 225 69.3% 2.67% 115 min
April 248 84.2% 0.4% 74 min
May 274 79% 0% 72 min
June 269 77.2% 0.37% 77 min
July 268 82.2% 1.49% 88 min
August 266 81.8% 0.38% 70 min
September 244 85.2% 0% 65 min
October 274 90.5% 0% 69 min
November 248 82.4% 1.21% 90 min
December 258 60.2% 1.16% 73 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.