Best time to fly Dublin to Birmingham

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

Best month

February

85.8% on time · 545 flights

Worst month

July

64.8% on time · 323 flights

Month Flights On time Cancelled When late, by
January 598 80% 2.34% 0 min
February 545 85.8% 0.37% 0 min
March 670 84.7% 0.6% 0 min
April 572 82.4% 0.87% 0 min
May 605 79.6% 0.17% 0 min
June 644 68.6% 1.71% 0 min
July 323 64.8% 2.48% 0 min
August 317 68.7% 1.26% 0 min
September 311 66.8% 0.32% 0 min
October 349 70.5% 2.87% 0 min
November 348 81.9% 1.44% 0 min
December 349 71.3% 2.01% 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.