Best time to fly London to Santiago de Compostela

Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full STN to SCQ 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 32 65.6% 0% 0 min
February 29 86.2% 0% 0 min
March 32 81.3% 0% 0 min
April 48 80.9% 2.08% 0 min
May 42 88.1% 0% 0 min
June 43 74.4% 0% 0 min
July 31 56.7% 3.23% 0 min
August 31 61.3% 0% 0 min
September 30 70% 0% 0 min
October 34 70.6% 0% 0 min
November 8 62.5% 0% 0 min
December 12 58.3% 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.