Best Time to Fly STT to JFK: On-Time Stats by Hour & Airline
Cyril E King → John F. Kennedy International
Data through July 2026 · Last updated October 18, 2026
544 flights were scheduled from Charlotte Amalie (STT) to New York (JFK) in the last 12 months, and 78.8% of those that flew arrived on time, 1.1 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 85.2% on time and American Airlines was last with 73.8%.
Over 24 months, Tuesday was the most reliable day (87% on time) and August the worst month (72%).
The cancellation rate was 3.3% (US average 1.8%).
STT to JFK 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 |
|---|---|---|---|---|
| Delta Air Lines | 85.2% | 46 min | 3.8% | 239 |
| American Airlines | 73.8% | 152 min | 3.0% | 305 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STT to JFK
On-time arrival % by scheduled departure hour (local time), 1,089 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 11am–12pm | 79.7% | 1.1% | 191 |
| 12pm–1pm | Limited data | 4 | |
| 1pm–2pm | 83.8% | 0.0% | 100 |
| 2pm–3pm | 87.3% | 1.5% | 131 |
| 3pm–4pm | 80.8% | 1.8% | 166 |
| 4pm–5pm | 79.5% | 1.1% | 364 |
| 5pm–6pm | 80.0% | 5.6% | 125 |
| 6pm–7pm | Limited data | 8 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STT to JFK
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 | 16 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 77.2% | -6.0 pts | 3.3% | 60 |
| Summer peak (Jun 15 - Aug 15) | 74.8% | -8.4 pts | 0.0% | 226 |
| All other days | 83.2% | — | 2.3% | 787 |
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).