Best time to fly St. Petersburg to Chattanooga

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full PIE to CHA 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 17 88.2% 0% 67 min
February 16 73.3% 6.25% 76 min
March 22 66.7% 4.55% 51 min
April 17 76.5% 0% 68 min
May 21 76.2% 0% 64 min
June 30 86.7% 0% 47 min
July 28 67.9% 0% 54 min
August 21 85% 4.76% 122 min
September 17 50% 5.88% 162 min
October 21 57.9% 9.52% 78 min
November 19 68.4% 0% 83 min
December 19 63.2% 0% 39 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.