PHL to STT flight delays & on-time performance
Nonstop flights from Philadelphia International Airport to Cyril E. King Airport · 1,605 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHL or STT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Philadelphia (PHL) to Charlotte Amalie (STT) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.1% were cancelled, and 9% arrived an hour or more late.
- American Airlines is the only airline reporting nonstop flights on this route.
- Wednesday was the most reliable day to fly (95% on time) and Saturday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from PHL to STT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 75% | 2.1% | 16 min | 9.3% | 187 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am77%162 flights
- 9am62%14 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday86%4.5% cancelled
- Tuesday82%0.0% cancelled
- Wednesday95%0.0% cancelled
- Thursday67%0.0% cancelled
- Friday86%0.0% cancelled
- Saturday64%3.5% cancelled
- Sunday67%4.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Air traffic control & airport congestion29%
- Airline (crew, maintenance, cleaning, fueling)18%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
PHL to STT: common questions
- How often are PHL to STT flights on time?
- 75% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Philadelphia to Charlotte Amalie cancelled?
- 2.1% of scheduled flights were cancelled (4 of 187).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 62 min behind schedule on average, and 9.3% of flights were an hour or more late.
- How long is taxi time at PHL?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STT to PHL — 72% on time
More flights from Philadelphia
More flights to Charlotte Amalie
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHL → STT, nonstop flights by US airlines that report to the DOT. How we calculate this.