Best time to fly São Paulo to Manaus

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

Best month

February

82.4% on time · 377 flights

Worst month

April

67.2% on time · 346 flights

Month Flights On time Cancelled When late, by
January 410 73.7% 0.73% 33 min
February 377 82.4% 0.53% 36 min
March 393 77.3% 0.25% 39 min
April 346 67.2% 0.58% 39 min
May 376 67.9% 1.33% 33 min
June 224 70.9% 1.79% 35 min
July 373 68.5% 0.54% 36 min
October 17 82.4% 0% 24 min
November 192 74.5% 4.17% 28 min
December 202 67.7% 1.98% 55 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.