Best time to fly London to Frankfurt am Main

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

Best month

February

90.4% on time · 95 flights

Worst month

July

67.4% on time · 46 flights

Month Flights On time Cancelled When late, by
January 103 84% 2.91% 0 min
February 95 90.4% 1.05% 0 min
March 102 85.1% 0.98% 0 min
April 66 84.8% 0% 0 min
May 58 86.2% 0% 0 min
June 54 73.1% 3.7% 0 min
July 46 67.4% 0% 0 min
August 41 75% 2.44% 0 min
September 63 68.9% 3.17% 0 min
October 71 81.4% 1.41% 0 min
November 61 85.2% 0% 0 min
December 62 82.3% 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.