Best time to fly Gold Coast to Sydney (Mascot)

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

Best month

April

90.1% on time · 722 flights

Worst month

January

71.1% on time · 743 flights

Month Flights On time Cancelled When late, by
January 743 71.1% 1.75% 0 min
February 523 79.4% 0.76% 0 min
March 596 82.1% 12.92% 0 min
April 722 90.1% 0.83% 0 min
May 672 88.5% 0.74% 0 min
June 1,299 84.1% 1% 0 min
July 741 72.9% 0.94% 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.