Best time to fly Newark to Valparaiso

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full EWR to VPS 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 5 100% 0%
February 11 100% 18.18%
March 18 66.7% 0% 26 min
April 17 76.5% 0% 63 min
May 19 47.4% 0% 116 min
June 23 82.6% 0% 157 min
July 22 63.6% 0% 73 min
August 22 81.8% 0% 26 min
September 18 88.9% 0% 130 min
October 25 76% 0% 53 min
November 18 83.3% 0% 82 min
December 24 83.3% 0% 426 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.