Best time to fly São Paulo to Campo Grande

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

Best month

October

87.5% on time · 17 flights

Worst month

April

65.9% on time · 289 flights

Month Flights On time Cancelled When late, by
January 197 68.4% 0.51% 39 min
February 166 70.5% 0% 32 min
March 194 78.8% 0.52% 42 min
April 289 65.9% 0.69% 41 min
May 362 76.3% 0.83% 37 min
June 228 74.4% 0.44% 38 min
July 206 73.2% 0.49% 40 min
October 17 87.5% 5.88% 126 min
November 179 68.5% 0.56% 32 min
December 202 69.2% 3.47% 44 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.