Best time to fly Palma de Mallorca to London

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

Best month

December

87.5% on time · 40 flights

Worst month

July

40.4% on time · 199 flights

Month Flights On time Cancelled When late, by
January 67 77.6% 0% 0 min
February 73 76.7% 0% 0 min
March 123 83.7% 0% 0 min
April 254 78% 0% 0 min
May 328 63.4% 0% 0 min
June 346 52.9% 0% 0 min
July 199 40.4% 0.5% 0 min
August 210 64.8% 0% 0 min
September 192 47.9% 0% 0 min
October 146 58.9% 0% 0 min
November 45 82.2% 0% 0 min
December 40 87.5% 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.