Best Time to Fly BOS to STT: On-Time Stats by Hour & Airline
Logan International → Cyril E King
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.8% of Boston (BOS) to Charlotte Amalie (STT) flights arrived on time (318 scheduled flights). That is 3.8 points below the national average of 77.6%.
Among 2 airlines, JetBlue led with 75.8% on time and Delta Air Lines was last with 70.8%.
Over 24 months, Tuesday was the most reliable day (84% on time) and February the worst month (61%).
The cancellation rate was 4.4% (US average 1.8%).
BOS 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 |
|---|---|---|---|---|
| JetBlue | 75.8% | 68 min | 4.2% | 191 |
| Delta Air Lines | 70.8% | 104 min | 4.7% | 127 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOS to STT
On-time arrival % by scheduled departure hour (local time), 453 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 28 | |
| 7am–8am | 73.3% | 1.3% | 76 |
| 8am–9am | 74.6% | 4.5% | 246 |
| 9am–10am | 70.2% | 2.1% | 48 |
| 10am–11am | 85.7% | 2.0% | 50 |
| 11am–12pm | Limited data | 5 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOS 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 | 5 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 70.2% | -6.0 pts | 6.0% | 50 |
| Summer peak (Jun 15 - Aug 15) | 70.0% | -6.2 pts | 3.1% | 32 |
| All other days | 76.2% | — | 2.7% | 366 |
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).