Best Time to Fly PHL to STT: On-Time Stats by Hour & Airline
Philadelphia International → Cyril E King
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.3% of Philadelphia (PHL) to Charlotte Amalie (STT) flights arrived on time (187 scheduled flights). That is 2.4 points below the national average of 77.6%.
American Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Friday was the most reliable day (90% on time) and February the worst month (72%).
The cancellation rate was 2.1% (US average 1.8%).
PHL to STT 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 | 75.3% | 62 min | 2.1% | 187 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to STT
On-time arrival % by scheduled departure hour (local time), 337 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 79.0% | 1.2% | 258 |
| 9am–10am | 63.4% | 2.4% | 42 |
| 10am–11am | 77.1% | 0.0% | 35 |
| 11am–12pm | Limited data | 2 | |
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 STT
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 | 78.4% | — | 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).