Best Time to Fly SJU to JFK: On-Time Stats by Hour & Airline
Luis Munoz Marin International → John F. Kennedy International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.3% of San Juan (SJU) to New York (JFK) flights arrived on time (3,596 scheduled flights). That is 0.7 points above the national average of 77.6%.
Among 3 airlines, Delta Air Lines led with 88.2% on time and JetBlue was last with 73.2%.
Over 24 months, Wednesday was the most reliable day (82% on time) and July the worst month (66%).
The cancellation rate was 3.2% (US average 1.8%).
SJU to JFK 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 |
|---|---|---|---|---|
| Delta Air Lines | 88.2% | 77 min | 2.2% | 1,104 |
| Frontier Airlines | 79.4% | 62 min | 2.0% | 255 |
| JetBlue | 73.2% | 82 min | 3.8% | 2,237 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJU to JFK
On-time arrival % by scheduled departure hour (local time), 7,741 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 90.0% | 0.0% | 30 |
| 1am–2am | 71.1% | 6.2% | 48 |
| 2am–3am | Limited data | 4 | |
| 3am–4am | 87.2% | 2.3% | 216 |
| 4am–5am | 81.4% | 0.0% | 145 |
| 5am–6am | 81.8% | 3.0% | 300 |
| 6am–7am | 85.6% | 1.3% | 756 |
| 7am–8am | 92.4% | 1.0% | 1,067 |
| 8am–9am | 83.5% | 4.9% | 224 |
| 9am–10am | 84.5% | 0.0% | 168 |
| 10am–11am | 74.3% | 3.2% | 189 |
| 11am–12pm | 79.8% | 1.8% | 334 |
| 12pm–1pm | 76.6% | 0.6% | 160 |
| 1pm–2pm | 80.4% | 1.1% | 956 |
| 2pm–3pm | 79.5% | 3.8% | 523 |
| 3pm–4pm | 66.9% | 6.6% | 137 |
| 4pm–5pm | 73.3% | 1.1% | 91 |
| 5pm–6pm | 78.4% | 2.3% | 442 |
| 6pm–7pm | 78.3% | 2.3% | 898 |
| 7pm–8pm | 70.2% | 2.7% | 221 |
| 8pm–9pm | 57.7% | 3.4% | 208 |
| 9pm–10pm | 65.6% | 1.4% | 518 |
| 10pm–11pm | 61.8% | 6.2% | 81 |
| 11pm–12am | Limited data | 25 | |
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 JFK
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) | 83.5% | +1.2 pts | 1.9% | 161 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.2% | -11.1 pts | 7.2% | 404 |
| Summer peak (Jun 15 - Aug 15) | 71.6% | -10.7 pts | 4.2% | 1,395 |
| All other days | 82.3% | — | 1.2% | 5,781 |
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).