Best Time to Fly STT to IAH: On-Time Stats by Hour & Airline
Cyril E King → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
173 flights were scheduled from Charlotte Amalie (STT) to Houston (IAH) in the last 12 months, and 84.4% of those that flew arrived on time, 6.8 points above the US average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Sunday was the most reliable day (91% on time) and March the worst month (69%).
The cancellation rate was 1.7% (US average 1.8%).
STT to IAH 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 |
|---|---|---|---|---|
| United Airlines | 84.4% | 45 min | 1.7% | 173 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STT to IAH
On-time arrival % by scheduled departure hour (local time), 315 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | Limited data | 15 | |
| 1pm–2pm | 83.6% | 0.5% | 193 |
| 2pm–3pm | 76.0% | 2.0% | 51 |
| 3pm–4pm | Limited data | 30 | |
| 4pm–5pm | Limited data | 26 | |
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 IAH
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 | 4 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 9 | ||
| Summer peak (Jun 15 - Aug 15) | 84.5% | +2.0 pts | 0.0% | 124 |
| All other days | 82.6% | — | 1.7% | 178 |
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).