Best time to fly Luton to Paris (Roissy-en-France

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

Best month

February

87.8% on time · 189 flights

Worst month

August

56.6% on time · 100 flights

Month Flights On time Cancelled When late, by
January 168 81.5% 0% 0 min
February 189 87.8% 0.53% 0 min
March 215 84.1% 0.47% 0 min
April 201 78.6% 0% 0 min
May 199 75.9% 0% 0 min
June 193 70% 1.55% 0 min
July 99 62.9% 2.02% 0 min
August 100 56.6% 1% 0 min
September 96 69.5% 1.04% 0 min
October 96 61.1% 1.04% 0 min
November 85 84.7% 0% 0 min
December 110 77.3% 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.