BOS to STT flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to Cyril E. King Airport · 1,693 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOS or STT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boston (BOS) to Charlotte Amalie (STT) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 4.4% were cancelled, and 11% arrived an hour or more late.
- JetBlue was the most punctual airline here (76% on time); Delta Air Lines was the least (71%).
- Departures scheduled around 10am did best (88% on time); around 7am did worst (62%).
- Tuesday was the most reliable day to fly (85% on time) and Sunday the least (61%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (47%).
Which airline is most on time from BOS 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 |
|---|---|---|---|---|---|
| JetBlue | 76% | 4.2% | 18 min | 9.3% | 191 |
| Delta Air Lines | 71% | 4.7% | 32 min | 14.2% | 127 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am62%22 flights
- 8am72%213 flights
- 9am76%35 flights
- 10am88%43 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday70%10.8% cancelled
- Tuesday85%6.8% cancelled
- Wednesday82%2.8% cancelled
- Thursday73%0.0% cancelled
- Friday77%2.2% cancelled
- Saturday71%4.9% cancelled
- Sunday61%2.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)47%
- Air traffic control & airport congestion40%
- Late-arriving aircraft7%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather57%
- Airline (crew, maintenance, cleaning, fueling)21%
- Air traffic control & airport congestion14%
- Security7%
BOS to STT: common questions
- How often are BOS to STT flights on time?
- 74% 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 Boston to Charlotte Amalie cancelled?
- 4.4% of scheduled flights were cancelled (14 of 318).
- How long are typical delays?
- Across all flights the average arrival delay was 23 min (early arrivals count as zero). Flights that were late arrived 84 min behind schedule on average, and 11.3% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STT to BOS — 79% on time
More flights from Boston
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: BOS → STT, nonstop flights by US airlines that report to the DOT. How we calculate this.