Best time to fly Chicago to Lafayette

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full ORD to LAF 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 49 66.7% 2.04% 164 min
February 44 77.3% 0% 190 min
March 49 74.4% 10.2% 125 min
April 47 46.3% 10.64% 87 min
May 49 67.3% 0% 106 min
June 43 77.5% 4.65% 120 min
August 43 73.2% 4.65% 192 min
September 47 72.3% 0% 45 min
October 49 61.2% 0% 60 min
November 46 79.5% 4.35% 96 min
December 52 59.2% 5.77% 137 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.