Best time to fly Springfield to Atlanta

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

Best month

February

90.9% on time · 22 flights

Worst month

July

71.2% on time · 219 flights

Month Flights On time Cancelled When late, by
January 22 86.4% 0% 98 min
February 22 90.9% 0% 418 min
March 27 77.8% 0% 120 min
April 28 78.6% 0% 63 min
May 51 77.6% 3.92% 163 min
June 143 76.3% 2.1% 87 min
July 219 71.2% 2.28% 84 min
August 222 84.5% 0.45% 116 min
September 196 87.6% 0% 67 min
October 180 90.5% 0% 105 min
November 139 89.1% 0.72% 53 min
December 125 79% 0.8% 68 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.