Best time to fly Mumbai to London

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

Best month

August

86.6% on time · 217 flights

Worst month

April

57.8% on time · 416 flights

Month Flights On time Cancelled When late, by
January 450 70.4% 0.89% 0 min
February 407 75.6% 0.49% 0 min
March 432 72.4% 3.47% 0 min
April 416 57.8% 1.92% 0 min
May 427 62.8% 0.47% 0 min
June 420 68.9% 2.86% 0 min
July 196 77.9% 0.51% 0 min
August 217 86.6% 0.46% 0 min
September 210 74.4% 1.43% 0 min
October 202 67.7% 0.5% 0 min
November 218 77.5% 0% 0 min
December 221 79.1% 0.45% 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.