Best time to fly Chicago to Syracuse

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

Best month

April

82.3% on time · 191 flights

Worst month

December

62.1% on time · 196 flights

Month Flights On time Cancelled When late, by
January 153 73.3% 3.92% 68 min
February 125 73.4% 0.8% 39 min
March 150 71.8% 5.33% 94 min
April 191 82.3% 2.62% 77 min
May 222 81.8% 0.9% 62 min
June 177 75.7% 3.39% 84 min
July 180 71% 2.22% 59 min
August 186 66.9% 2.15% 81 min
September 190 81% 0.53% 67 min
October 223 77.6% 0% 67 min
November 196 75.7% 7.14% 84 min
December 196 62.1% 3.06% 95 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.