Best time to fly Madison to New York

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

Best month

October

93.7% on time · 147 flights

Worst month

December

77.9% on time · 128 flights

Month Flights On time Cancelled When late, by
January 115 85% 6.96% 74 min
February 108 86.9% 8.33% 73 min
March 140 79.7% 8.57% 61 min
April 142 87.1% 0.7% 44 min
May 125 84.7% 0.8% 69 min
June 96 87.9% 3.13% 78 min
July 89 89.2% 6.74% 90 min
August 106 89% 4.72% 67 min
September 139 89.6% 1.44% 41 min
October 147 93.7% 2.04% 114 min
November 138 87.4% 2.17% 79 min
December 128 77.9% 3.13% 63 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.