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Best time to fly London to Glasgow

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

Best month

February

93.3% on time · 104 flights

Worst month

January

80.2% on time · 99 flights

Month Flights On time Cancelled When late, by
January 99 80.2% 8.08% 0 min
February 104 93.3% 0% 0 min
March 114 87.7% 0% 0 min
April 111 84.7% 0% 0 min
May 104 80.8% 0% 0 min
June 395 82% 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.