Best Time to Fly SJU to EWR: On-Time Stats by Hour & Airline
Luis Munoz Marin International → Newark Liberty International
Data through July 2026 · Last updated October 18, 2026
2,084 flights were scheduled from San Juan (SJU) to Newark (EWR) in the last 12 months, and 75.0% of those that flew arrived on time, 2.6 points below the US average of 77.6%.
United Airlines was the most punctual of the 4 airlines on the route at 77.7%, while Spirit Airlines trailed at 64.5%.
November has been the best month (80% on time) and Sunday the weakest day of the week (69%).
3.1% of flights were cancelled, versus 1.8% nationally.
SJU to EWR on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 77.7% | 100 min | 2.6% | 1,113 |
| JetBlue | 73.1% | 78 min | 3.1% | 654 |
| Frontier Airlines | 72.5% | 61 min | 2.7% | 184 |
| Spirit Airlines | 64.5% | 79 min | 8.3% | 133 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJU to EWR
On-time arrival % by scheduled departure hour (local time), 4,472 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 6 | |
| 1am–2am | 81.0% | 1.0% | 494 |
| 2am–3am | 84.0% | 1.6% | 254 |
| 5am–6am | 85.7% | 4.1% | 73 |
| 6am–7am | 76.3% | 3.6% | 224 |
| 7am–8am | 78.0% | 5.6% | 107 |
| 8am–9am | 80.0% | 0.0% | 145 |
| 9am–10am | Limited data | 5 | |
| 10am–11am | Limited data | 11 | |
| 11am–12pm | 84.2% | 0.0% | 122 |
| 12pm–1pm | 74.7% | 0.0% | 92 |
| 1pm–2pm | 66.1% | 3.1% | 508 |
| 2pm–3pm | 68.6% | 4.5% | 287 |
| 3pm–4pm | 64.7% | 4.1% | 122 |
| 4pm–5pm | 70.3% | 1.4% | 434 |
| 5pm–6pm | 62.2% | 3.8% | 210 |
| 6pm–7pm | 79.2% | 1.5% | 399 |
| 7pm–8pm | 73.5% | 3.0% | 440 |
| 8pm–9pm | 70.6% | 1.1% | 182 |
| 9pm–10pm | 66.0% | 3.2% | 253 |
| 10pm–11pm | 64.3% | 0.0% | 84 |
| 11pm–12am | Limited data | 20 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJU to EWR
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 77.2% | +1.7 pts | 3.7% | 82 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.4% | -6.0 pts | 4.9% | 243 |
| Summer peak (Jun 15 - Aug 15) | 65.7% | -9.8 pts | 3.9% | 762 |
| All other days | 75.5% | — | 1.8% | 3,385 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).