Best time to fly Newark to São Paulo
Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full EWR to GRU record →
Best month
May
59.7% on time · 62 flights
Worst month
March
32.3% on time · 62 flights
| Month | Flights | On time | Cancelled | When late, by |
|---|---|---|---|---|
| January | 62 | 54.8% | 0% | 116 min |
| February | 56 | 52.7% | 1.79% | 112 min |
| March | 62 | 32.3% | 0% | 683 min |
| April | 60 | 42.1% | 5% | 90 min |
| May | 62 | 59.7% | 0% | 139 min |
| June | 60 | 50% | 0% | 181 min |
| July | 93 | 32.3% | 0% | 152 min |
| August | 62 | 32.3% | 0% | 185 min |
| September | 60 | 40.7% | 1.67% | 130 min |
| October | 51 | 56.9% | 0% | 43 min |
| November | 60 | 51.7% | 0% | 66 min |
| December | 62 | 53.2% | 0% | 192 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.