Best time to fly São Paulo to Tocumen

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

Best month

April

96.7% on time · 300 flights

Worst month

March

81.2% on time · 310 flights

Month Flights On time Cancelled When late, by
January 352 90.6% 0% 36 min
February 280 89.2% 0.36% 38 min
March 310 81.2% 0.65% 33 min
April 300 96.7% 0% 50 min
May 312 94.8% 0.64% 46 min
June 201 93.5% 0.5% 45 min
July 333 95.2% 0.3% 65 min
November 150 96% 0% 56 min
December 154 92.9% 0% 37 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.