Best time to fly Leeds to Dublin

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

Best month

March

83.3% on time · 142 flights

Worst month

June

71.1% on time · 322 flights

Month Flights On time Cancelled When late, by
January 124 73.3% 6.45% 0 min
February 120 80.5% 1.67% 0 min
March 142 83.3% 2.82% 0 min
April 155 82.6% 0% 0 min
May 169 76.3% 0% 0 min
June 322 71.1% 1.24% 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.