69% of EWR → SJU flights arrived on time in June-August 2026 (530 flights). The most reliable was B6 1089, on time 86% of the time on this route. Morning flights did best (75%), evening flights worst (55%). Newark (EWR): no delay reported. SJU (SJU): no delay reported.
Best time of day to fly EWR → SJU
| Morning (before noon) | |
| Evening (after 5 PM) |
Flights EWR → SJU, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| B6 1089 JetBlue | 6:00 AM | 3.7% | |
| UA 1556 United | 9:46 AM | 0% | |
| B6 1889 JetBlue | 11:18 AM | 2.2% | |
| UA 1543 United | 7:45 PM | 2.2% | |
| UA 2143 United | 8:00 AM | 0% | |
| B6 2389 JetBlue | 9:55 PM | 10% |
EWR conditions · SJU → EWR · Cancellations
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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.