Best Time to Fly JFK to STT: On-Time Stats by Hour & Airline
John F. Kennedy International → Cyril E King
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.2% of New York (JFK) to Charlotte Amalie (STT) flights arrived on time (544 scheduled flights). That is 1.5 points above the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 79.7% on time and American Airlines was last with 78.7%.
Over 24 months, Friday was the most reliable day (86% on time) and August the worst month (68%).
The cancellation rate was 2.6% (US average 1.8%).
JFK 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 |
|---|---|---|---|---|
| Delta Air Lines | 79.7% | 61 min | 2.5% | 239 |
| American Airlines | 78.7% | 120 min | 2.6% | 305 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JFK to STT
On-time arrival % by scheduled departure hour (local time), 1,089 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 77.3% | 1.0% | 206 |
| 8am–9am | 82.7% | 0.9% | 646 |
| 9am–10am | 83.0% | 2.5% | 236 |
| 10am–11am | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JFK 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 | 16 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 72.4% | -11.0 pts | 3.3% | 60 |
| Summer peak (Jun 15 - Aug 15) | 77.0% | -6.5 pts | 0.0% | 226 |
| All other days | 83.5% | — | 1.5% | 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).