Best time to fly London to Segrate (MI)

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

Best month

February

90.8% on time · 347 flights

Worst month

July

63.2% on time · 191 flights

Month Flights On time Cancelled When late, by
January 381 77.3% 0.52% 0 min
February 347 90.8% 0% 0 min
March 387 79.8% 1.55% 0 min
April 392 86.6% 1.02% 0 min
May 402 82% 0.5% 0 min
June 379 73.8% 1.32% 0 min
July 191 63.2% 3.14% 0 min
August 187 76.5% 0% 0 min
September 196 65.4% 2.55% 0 min
October 211 78% 0.95% 0 min
November 216 83.6% 1.39% 0 min
December 225 78.5% 0.89% 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.