Best time to fly Detroit to Kalamazoo

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

Best month

October

95.4% on time · 88 flights

Worst month

January

44.4% on time · 75 flights

Month Flights On time Cancelled When late, by
January 75 44.4% 4% 122 min
February 70 59.4% 0% 153 min
March 87 61.4% 4.6% 106 min
April 70 83.8% 2.86% 75 min
May 87 77% 0% 162 min
June 111 87.4% 0% 91 min
July 88 69.8% 2.27% 62 min
August 87 75.9% 0% 83 min
September 85 90.6% 0% 65 min
October 88 95.4% 0% 203 min
November 84 77.9% 8.33% 133 min
December 63 61.9% 0% 132 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.