Best time to fly London to Ingliston

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

Best month

February

93.1% on time · 625 flights

Worst month

June

72.9% on time · 1,272 flights

Month Flights On time Cancelled When late, by
January 704 80.6% 4.69% 0 min
February 625 93.1% 0.32% 0 min
March 694 82.6% 3.75% 0 min
April 676 89.3% 0% 0 min
May 634 78.4% 0% 0 min
June 1,272 72.9% 1.57% 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.