Best time to fly Ingliston to Southampton

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

Best month

May

88.2% on time · 204 flights

Worst month

June

63.7% on time · 380 flights

Month Flights On time Cancelled When late, by
January 171 70.4% 5.26% 0 min
February 160 86% 1.88% 0 min
March 196 80.2% 2.04% 0 min
April 204 81.4% 0% 0 min
May 204 88.2% 0% 0 min
June 380 63.7% 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.