Best time to fly London to Manchester

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

Best month

November

85.7% on time · 512 flights

Worst month

September

59.6% on time · 378 flights

Month Flights On time Cancelled When late, by
January 1,023 75.1% 1.96% 0 min
February 904 83.1% 0% 0 min
March 1,007 83.7% 2.18% 0 min
April 776 82.7% 0% 0 min
May 763 73.1% 0.66% 0 min
June 712 69.4% 1.26% 0 min
July 365 70.2% 0.55% 0 min
August 334 72% 0.6% 0 min
September 378 59.6% 1.06% 0 min
October 435 71.1% 0.46% 0 min
November 512 85.7% 0% 0 min
December 528 71.4% 0.76% 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.