Best Time to Fly PHL to SJU: On-Time Stats by Hour & Airline
Philadelphia International → Luis Munoz Marin International
Data through July 2026 · Last updated October 18, 2026
1,932 flights were scheduled from Philadelphia (PHL) to San Juan (SJU) in the last 12 months, and 63.2% of those that flew arrived on time, 14.5 points below the US average of 77.6%.
JetBlue was the most punctual of the 4 airlines on the route at 71.8%, while Frontier Airlines trailed at 56.7%.
November has been the best month (76% on time) and Monday the weakest day of the week (63%).
3.3% of flights were cancelled, versus 1.8% nationally.
PHL to SJU 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 |
|---|---|---|---|---|
| JetBlue | 71.8% | 102 min | 2.3% | 128 |
| American Airlines | 69.8% | 85 min | 1.9% | 732 |
| Spirit Airlines | 61.5% | 65 min | 8.7% | 185 |
| Frontier Airlines | 56.7% | 73 min | 3.4% | 887 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to SJU
On-time arrival % by scheduled departure hour (local time), 3,513 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 70.4% | 2.9% | 379 |
| 7am–8am | 71.6% | 1.4% | 143 |
| 8am–9am | 79.1% | 1.0% | 497 |
| 9am–10am | 76.6% | 0.0% | 139 |
| 10am–11am | 61.9% | 1.6% | 64 |
| 11am–12pm | 65.5% | 2.1% | 290 |
| 12pm–1pm | 72.4% | 2.2% | 138 |
| 1pm–2pm | 60.6% | 0.0% | 33 |
| 2pm–3pm | 48.8% | 4.5% | 44 |
| 3pm–4pm | 49.2% | 1.6% | 62 |
| 4pm–5pm | 55.9% | 1.7% | 174 |
| 5pm–6pm | 50.0% | 1.6% | 63 |
| 6pm–7pm | 61.1% | 1.9% | 418 |
| 7pm–8pm | 58.6% | 4.1% | 170 |
| 8pm–9pm | 51.0% | 5.4% | 571 |
| 9pm–10pm | 66.0% | 2.9% | 103 |
| 10pm–11pm | 60.9% | 4.2% | 48 |
| 11pm–12am | 80.9% | 2.3% | 177 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHL to SJU
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) | 73.4% | +5.0 pts | 1.5% | 65 |
| Christmas & New Year (Dec 20 - Jan 3) | 58.0% | -10.4 pts | 6.6% | 183 |
| Summer peak (Jun 15 - Aug 15) | 52.1% | -16.2 pts | 4.4% | 612 |
| All other days | 68.4% | — | 1.9% | 2,653 |
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).