Best time to fly London to Paris (Orly

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full LGW to ORY 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 77 86.8% 1.3% 0 min
February 75 90.7% 0% 0 min
March 80 92.4% 1.25% 0 min
April 61 85% 1.64% 0 min
May 61 73.3% 1.64% 0 min
June 64 68.8% 0% 0 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.