Best time to fly São Paulo to Porto Seguro

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

Best month

May

83.4% on time · 318 flights

Worst month

December

67.5% on time · 171 flights

Month Flights On time Cancelled When late, by
January 396 80.9% 1.01% 37 min
February 298 78.2% 1.34% 37 min
March 308 83.1% 1.95% 34 min
April 310 72.4% 1.94% 37 min
May 318 83.4% 1.57% 39 min
June 213 82.9% 3.76% 51 min
July 570 83% 1.93% 45 min
October 18 76.5% 5.56% 50 min
November 148 77.3% 4.73% 40 min
December 171 67.5% 4.68% 39 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.