St Louis (STL) to Houston (HOU) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to William P. Hobby Airport, with about 33 flights a week in July 2026. The 687-mile flight takes about 1h 59m gate to gate.
- Distance
- 687 mi · 1,106 km
- Flight time
- 1h 59m
- Airlines
- 1
- Seats filled
- 66%
Airlines flying STL to HOU
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 33 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 163,937 | 1h 59m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to HOU flight schedule
9 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 5:15am and the last at 8:55pm. 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) |
|---|---|---|---|---|
| WN 3524Southwest Airlines | 5:15am | 7:15am | 28 | 93% |
| WN 1974Southwest Airlines | 8:20am | 10:20am | 4 | n/a |
| WN 4419Southwest Airlines | 8:40am | 10:40am | 8 | n/a |
| WN 3713Southwest Airlines | 10:55am | 12:55pm | 28 | 57% |
| WN 3841Southwest Airlines | 12:15pm | 2:15pm | 16 | 79% |
| WN 3061Southwest Airlines | 3:05pm | 5:05pm | 4 | n/a |
| WN 1030Southwest Airlines | 5:50pm | 7:50pm | 12 | 92% |
| WN 3843Southwest Airlines | 8:45pm | 10:45pm | 8 | n/a |
| WN 4690Southwest Airlines | 8:55pm | 10:55pm | 12 | 67% |
Is STL to HOU on time?
From September 2025 to August 2026, 78% of 1,547 flights arrived within 15 minutes of schedule and 0.3% were cancelled. Flights leaving around 5am were the most punctual (95%), those around 7pm the least (56%). Most delay time was caused by late-arriving aircraft (55%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,547 | 78% | 13 min | 0.3% |
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 |
|---|---|---|---|
| 5am to 6am | 259 | 95% | |
| 6am to 7am | 75 | 89% | |
| 7am to 8am | 84 | 93% | |
| 8am to 9am | 152 | 91% | |
| 9am to 10am | 72 | 83% | |
| 11am to 12pm | 34 | 94% | |
| 12pm to 1pm | 75 | 78% | |
| 1pm to 2pm | 67 | 61% | |
| 2pm to 3pm | 52 | 64% | |
| 4pm to 5pm | 49 | 67% | |
| 5pm to 6pm | 123 | 76% | |
| 6pm to 7pm | 103 | 61% | |
| 7pm to 8pm | 106 | 56% | |
| 8pm to 9pm | 116 | 80% | |
| 9pm to 10pm | 107 | 61% | |
| 10pm to 11pm | 44 | 66% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 130 | 13,849 | |
| September 2025 | 124 | 12,141 | |
| October 2025 | 124 | 14,252 | |
| November 2025 | 133 | 14,063 | |
| December 2025 | 138 | 15,832 | |
| January 2026 | 108 | 10,421 | |
| February 2026 | 108 | 11,449 | |
| March 2026 | 142 | 16,234 | |
| April 2026 | 131 | 12,405 | |
| May 2026 | 130 | 13,965 | |
| June 2026 | 128 | 14,185 | |
| July 2026 | 147 | 15,141 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.