Best time to fly Charlotte Amalie to Houston

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full STT to IAH 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 11 77.8% 18.18% 93 min
February 8 71.4% 0% 33 min
March 32 68.8% 0% 41 min
April 9 87.5% 0% 46 min
May 44 81.8% 0% 46 min
June 60 76.3% 0% 45 min
July 61 83.1% 3.28% 56 min
August 38 88.6% 5.26% 90 min
September 5 100% 0%
October 10 100% 0%
November 19 100% 0%
December 17 94.1% 0% 144 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.