Best time to fly London to Tallinn

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full STN to TLL 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 51 80.4% 0% 0 min
February 52 92.3% 0% 0 min
March 55 90.9% 0% 0 min
April 35 82.9% 0% 0 min
May 35 74.3% 0% 0 min
June 34 73.5% 0% 0 min
July 18 61.1% 0% 0 min
August 18 61.1% 0% 0 min
September 17 88.2% 0% 0 min
October 20 85% 0% 0 min
November 30 83.3% 0% 0 min
December 31 77.4% 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.