Best time to fly Rockford to Phoenix

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full RFD to AZA 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 25 76% 0% 81 min
February 26 76.9% 0% 77 min
March 42 81% 0% 69 min
April 28 67.9% 0% 67 min
May 28 78.6% 0% 41 min
June 30 63.3% 0% 53 min
July 27 73.1% 3.7% 70 min
August 23 87% 0% 49 min
September 23 91.3% 0% 57 min
October 30 80% 0% 122 min
November 22 68.2% 0% 74 min
December 30 63.3% 0% 48 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.