Best Time to Fly STT to PHL: On-Time Stats by Hour & Airline
Cyril E King → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 72.4% of Charlotte Amalie (STT) to Philadelphia (PHL) flights arrived on time (187 scheduled flights). That is 5.2 points below the national average of 77.6%.
American Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (84% on time) and February the worst month (65%).
The cancellation rate was 2.1% (US average 1.8%).
STT to PHL 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 |
|---|---|---|---|---|
| American Airlines | 72.4% | 138 min | 2.1% | 187 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STT to PHL
On-time arrival % by scheduled departure hour (local time), 337 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 11am–12pm | 85.7% | 0.0% | 37 |
| 12pm–1pm | Limited data | 15 | |
| 1pm–2pm | 80.0% | 0.0% | 65 |
| 2pm–3pm | 70.7% | 1.8% | 164 |
| 3pm–4pm | 80.0% | 3.2% | 31 |
| 4pm–5pm | Limited data | 2 | |
| 5pm–6pm | Limited data | 23 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STT to PHL
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) | Limited data | 3 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 26 | ||
| Summer peak (Jun 15 - Aug 15) | Limited data | 16 | ||
| All other days | 77.1% | — | 1.0% | 292 |
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).