Best time to fly New York to Dallas/Fort Worth

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

Best month

September

81.1% on time · 1,146 flights

Worst month

June

64.2% on time · 1,138 flights

Month Flights On time Cancelled When late, by
January 1,089 74.9% 7.9% 73 min
February 996 77.1% 5.02% 73 min
March 1,136 76.1% 4.84% 83 min
April 1,104 73.5% 1.45% 67 min
May 1,143 68.2% 2.89% 87 min
June 1,138 64.2% 5.36% 99 min
July 1,195 67.3% 5.52% 104 min
August 1,163 76.4% 4.04% 84 min
September 1,146 81.1% 1.05% 76 min
October 1,202 76.8% 1.25% 88 min
November 1,174 75.2% 2.13% 80 min
December 1,103 68.2% 2.63% 72 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.