St Louis (STL) to Houston (IAH) flights
Mesa Airlines, GoJet Airlines, SkyWest Airlines, United Airlines fly nonstop from St. Louis Lambert International Airport to George Bush Intercontinental Airport, with about 30 flights a week in July 2026. The 667-mile flight takes about 2h 10m gate to gate.
- Distance
- 667 mi · 1,073 km
- Flight time
- 2h 10m
- Airlines
- 4
- Seats filled
- 77%
Airlines flying STL to IAH
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Mesa Airlines | 17 | Embraer E175 | 49,022 | 2h 11m |
| GoJet Airlines | 7 | Bombardier CRJ550 | 1,180 | 2h 7m |
| SkyWest Airlines | 5 | Embraer E175 | 4,641 | 2h 15m |
| United Airlines | <1 | Airbus A319, Airbus A320-100/200, Boeing 737-700 / MAX 7 | 33,351 | 2h 8m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to IAH flight schedule
11 flight numbers flew this route in August 2026. The first usually leaves at 6:14am and the last at 6:30pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 6283United Airlines · operated by Mesa Airlines | 6:14am | 8:31am | 10 | 86% |
| UA 4608United Airlines · operated by GoJet Airlines | 6:15am | 8:32am | 7 | n/a |
| UA 6258United Airlines · operated by Mesa Airlines | 6:15am | 8:32am | 8 | n/a |
| UA 4579United Airlines · operated by GoJet Airlines | 8:35am | 10:50am | 10 | 88% |
| UA 4585United Airlines · operated by GoJet Airlines | 8:35am | 10:52am | 15 | 93% |
| UA 6213United Airlines · operated by Mesa Airlines | 11:10am | 1:25pm | 13 | 85% |
| UA 5566United Airlines · operated by SkyWest Airlines | 11:15am | 1:32pm | 15 | 73% |
| UA 5580United Airlines · operated by SkyWest Airlines | 2:57pm | 5:16pm | 7 | 65% |
| UA 4609United Airlines · operated by GoJet Airlines | 3:13pm | 5:25pm | 6 | n/a |
| UA 6156United Airlines · operated by Mesa Airlines | 3:13pm | 5:25pm | 15 | 93% |
| UA 6284United Airlines · operated by Mesa Airlines | 6:30pm | 8:50pm | 6 | 74% |
Is STL to IAH on time?
From September 2025 to August 2026, 83% of 1,264 flights arrived within 15 minutes of schedule and 0.9% were cancelled. Flights leaving around 10am were the most punctual (87%), those around 4pm the least (83%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (34%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,264 | 83% | 12 min | 0.9% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 361 | 83% | |
| 8am to 9am | 170 | 86% | |
| 10am to 11am | 148 | 87% | |
| 11am to 12pm | 200 | 84% | |
| 2pm to 3pm | 58 | 66% | |
| 4pm to 5pm | 211 | 83% | |
| 5pm to 6pm | 47 | 85% | |
| 6pm to 7pm | 46 | 74% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 110 | 7,144 | |
| September 2025 | 114 | 7,893 | |
| October 2025 | 109 | 8,623 | |
| November 2025 | 111 | 7,768 | |
| December 2025 | 91 | 7,830 | |
| January 2026 | 84 | 6,767 | |
| February 2026 | 81 | 6,425 | |
| March 2026 | 91 | 6,684 | |
| April 2026 | 90 | 6,489 | |
| May 2026 | 106 | 7,392 | |
| June 2026 | 127 | 7,690 | |
| July 2026 | 133 | 7,633 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.