IAH to STT flight delays & on-time performance
Nonstop flights from George Bush Intercontinental Airport to Cyril E. King Airport · 2,070 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAH or STT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (IAH) to Charlotte Amalie (STT) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.7% were cancelled, and 3% arrived an hour or more late.
- United Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9am did best (92% on time); around 7am did worst (65%).
- Monday was the most reliable day to fly (89% on time) and Thursday the least (75%).
- The largest source of delay minutes was air traffic control & airport congestion (62%).
Which airline is most on time from IAH to STT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 84% | 1.7% | 8 min | 2.9% | 173 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am65%53 flights
- 9am92%120 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday89%0.0% cancelled
- Tuesday83%0.0% cancelled
- Wednesday89%0.0% cancelled
- Thursday75%0.0% cancelled
- Friday76%0.0% cancelled
- Saturday87%4.3% cancelled
- Sunday83%3.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion62%
- Airline (crew, maintenance, cleaning, fueling)25%
- Late-arriving aircraft13%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
IAH to STT: common questions
- How often are IAH to STT flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to Charlotte Amalie cancelled?
- 1.7% of scheduled flights were cancelled (3 of 173).
- How long are typical delays?
- Across all flights the average arrival delay was 8 min (early arrivals count as zero). Flights that were late arrived 42 min behind schedule on average, and 2.9% of flights were an hour or more late.
- How long is taxi time at IAH?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STT to IAH — 84% on time
More flights from Houston
More flights to Charlotte Amalie
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAH → STT, nonstop flights by US airlines that report to the DOT. How we calculate this.