Houston (IAH) to San Antonio (SAT) flights
United Airlines, Mesa Airlines, SkyWest Airlines fly nonstop from George Bush Intercontinental Airport to San Antonio International Airport, with about 56 flights a week in July 2026. The 191-mile flight takes about 1h 3m gate to gate.
- Distance
- 191 mi · 307 km
- Flight time
- 1h 3m
- Airlines
- 3
- Seats filled
- 77%
Airlines flying IAH to SAT
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 36 | Boeing 737-700 / MAX 7, Airbus A319, Airbus A320-100/200 | 256,581 | 1h 3m |
| Mesa Airlines | 15 | Embraer E175 | 30,690 | 1h 2m |
| SkyWest Airlines | 5 | Embraer E175 | 7,057 | 1h 6m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAH to SAT flight schedule
14 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 7:20am and the last at 9:35pm. 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 2250United Airlines | 7:20am | 8:27am | 10 | 92% |
| UA 320United Airlines | 9:30am | 10:36am | 9 | n/a |
| UA 6161United Airlines · operated by Mesa Airlines | 9:30am | 10:37am | 12 | 100% |
| UA 6201United Airlines · operated by Mesa Airlines | 9:39am | 10:46am | 10 | 91% |
| UA 6202United Airlines · operated by Mesa Airlines | 12:08pm | 1:17pm | 10 | 78% |
| UA 5517United Airlines · operated by SkyWest Airlines | 12:20pm | 1:29pm | 18 | 100% |
| UA 1819United Airlines | 2:31pm | 3:39pm | 10 | 77% |
| UA 697United Airlines | 2:35pm | 3:43pm | 21 | 85% |
| UA 413United Airlines | 4:35pm | 5:43pm | 6 | n/a |
| UA 5379United Airlines · operated by SkyWest Airlines | 4:35pm | 5:44pm | 7 | 81% |
| UA 6157United Airlines · operated by Mesa Airlines | 4:35pm | 5:44pm | 15 | 73% |
| UA 1477United Airlines | 6:50pm | 7:58pm | 31 | 73% |
| UA 1542United Airlines | 8:05pm | 9:16pm | 31 | 78% |
| UA 2198United Airlines | 9:35pm | 10:39pm | 31 | 73% |
Is IAH to SAT on time?
From September 2025 to August 2026, 83% of 2,873 flights arrived within 15 minutes of schedule and 0.6% were cancelled. Flights leaving around 7am were the most punctual (94%), those around 6pm the least (73%). Most delay time was caused by late-arriving aircraft (44%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 2,873 | 83% | 11 min | 0.6% |
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 |
|---|---|---|---|
| 7am to 8am | 332 | 94% | |
| 9am to 10am | 363 | 88% | |
| 11am to 12pm | 107 | 93% | |
| 12pm to 1pm | 258 | 85% | |
| 2pm to 3pm | 365 | 84% | |
| 4pm to 5pm | 357 | 82% | |
| 6pm to 7pm | 365 | 73% | |
| 8pm to 9pm | 327 | 78% | |
| 9pm to 10pm | 360 | 82% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 250 | 24,291 | |
| September 2025 | 240 | 25,287 | |
| October 2025 | 248 | 26,854 | |
| November 2025 | 231 | 23,414 | |
| December 2025 | 245 | 26,116 | |
| January 2026 | 237 | 23,683 | |
| February 2026 | 219 | 22,331 | |
| March 2026 | 243 | 27,356 | |
| April 2026 | 240 | 24,815 | |
| May 2026 | 250 | 24,110 | |
| June 2026 | 238 | 23,406 | |
| July 2026 | 248 | 24,260 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.