Charlotte Amalie (STT) to Washington (IAD): On-Time Performance
Data through July 2026
Charlotte Amalie (STT) to Washington (IAD) is a thinner route than most in this dataset — 336 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 83% arrived on time.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 0.92
- last 12 months
- Duration
- 4h 16m
- scheduled
- Distance
- 1,606 mi
Monthly on-time trend
Best time to fly from STT to IAD
Aim for departures around 1 p.m. (87% on-time); avoid 12 p.m. departures (77%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 87% | 10 min |
| Tuesday | 84% | 7 min |
| Wednesday | 79% | 13 min |
| Thursday | 82% | 12 min |
| Friday | 84% | 12 min |
| Saturday | 83% | 10 min |
| Sunday | 80% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft53%
- Airline operations21%
- National airspace system25%
- Weather1%
Frequently asked questions
- How often are flights from STT to IAD delayed?
- 17% of STT–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- What is the best time of day to fly from STT to IAD?
- Departures around 1 p.m. have the best record (87% on-time), while departures around 12 p.m. have the worst (77%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STT to IAD?
- The scheduled STT–IAD flight time averages 4h 16m over 1,606 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are STT to IAD flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from STT to IAD?
- August 2024 was the roughest month in this dataset, with only 65% of arrivals on time. The best was November 2024 at 97%. If your dates are flexible, that 31-point gap is worth planning around.
Explore related pages
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Other ways to fly to Washington (IAD)
Related guides
Based on 680 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.