Routes › Charlotte Amalie (STT) › STT to BOS
Route · 12 months to July 2026
Charlotte Amalie to Boston: on-time record
Cyril E King to Logan International
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
In the 12 months to July 2026, reporting carriers scheduled 127 flights from Charlotte Amalie (STT) to Boston (BOS), a distance of 1,693 miles. 70.1% of them arrived within 15 minutes of schedule.
That is 5.9 points below the national on-time share of 76.0% for the same period and 5.8 points below the 75.9% recorded for all departures from STT. Flights that did arrive were 1.9 min late on average, and 4.7% of scheduled flights were cancelled (national: 1.8%).
Delta Air Lines is the only reporting carrier on the route, with 127 flights in the period.
Of the delay minutes that carriers assigned to a BTS cause category on this route, late-arriving aircraft 54%, air carrier 29% and national aviation system 18%.
- On time 70.1%
- Arrived 15+ minutes late 18.9%
- Cancelled 4.7%
- Diverted 6.3%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DL Delta Air Lines | 127 | 100% | 70.1% | 1.9 min | 4.7% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | STT to BOS | All departures from STT | All arrivals at BOS | All reported flights |
|---|---|---|---|---|
| Arrived on time | 70.1% | 75.9% | 71.2% | 76.0% |
| Arrived 15+ minutes late | 18.9% | 20.1% | 25.9% | 21.9% |
| Cancelled | 4.7% | 2.1% | 2.8% | 1.8% |
| Diverted | 6.3% | 1.9% | 0.1% | 0.3% |
| Average arrival delay | 1.9 min | 6.3 min | 11.5 min | 8.1 min |
| Delay minutes per 100 flights | 1,358 | 1,936 | 2,030 | 1,684 |
| Scheduled flights | 127 | 5,548 | 143,441 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, BOS to STT, recorded 70.1% on time across 318 flights in the same period.
Month by month
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jan | 31 | 67.7% | 9.7% | -9.0 min | 1 |
| Feb | 28 | 53.6% | 7.1% | 30.8 min | 1 |
| Mar | 31 | 67.7% | 3.2% | -2.5 min | 1 |
| Apr | 25 | 88.0% | 0.0% | -11.1 min | 1 |
| Dec | 12 | 83.3% | 0.0% | -2.9 min | 1 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Charlotte Amalie (STT)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| STT–MIA | Charlotte Amalie to Miami | 941 | 80.7% | 7.0 min | 1.1% |
| STT–ATL | Charlotte Amalie to Atlanta | 719 | 78.7% | 2.0 min | 2.2% |
| STT–CLT | Charlotte Amalie to Charlotte | 610 | 84.8% | -2.2 min | 1.8% |
| STT–SJU | Charlotte Amalie to San Juan | 548 | 69.7% | 16.5 min | 2.2% |
| STT–JFK | Charlotte Amalie to New York | 544 | 74.3% | 11.6 min | 3.3% |
| STT–MCO | Charlotte Amalie to Orlando | 393 | 70.2% | 7.6 min | 2.3% |
| STT–IAD | Charlotte Amalie to Washington | 336 | 79.5% | -1.3 min | 1.8% |
| STT–FLL | Charlotte Amalie to Fort Lauderdale | 258 | 69.0% | 10.4 min | 1.9% |
All 15 routes and the airport record for STT · airport record for BOS
Questions and answers
How often are flights from Charlotte Amalie to Boston on time?
70.1% of the 127 flights scheduled from STT to BOS in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from STT to BOS?
Delta Air Lines is the only reporting carrier with at least 60 flights on the route in the period, so there is no comparison to make.
What causes delays between Charlotte Amalie and Boston?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: late-arriving aircraft 54%, air carrier 29%, national aviation system 18%, extreme weather 0%, security 0%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from STT?
Too few departure hours carry enough flights on this route to compare them.
Is it getting better?
The route does not have enough flights in the previous 12 months for a year-on-year comparison. The monthly chart on this page shows the months that are available.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.