Houston (IAH) to San Diego (SAN) flights
United Airlines flies nonstop from George Bush Intercontinental Airport to San Diego International Airport, with about 32 flights a week in July 2026. The 1,303-mile flight takes about 3h 21m gate to gate.
- Distance
- 1,303 mi · 2,097 km
- Flight time
- 3h 21m
- Airlines
- 1
- Seats filled
- 81%
Airlines flying IAH to SAN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 32 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-900 | 242,630 | 3h 21m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAH to SAN flight schedule
7 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 9:33am and the last at 8:03pm. 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 2491United Airlines | 9:33am | 10:55am | 31 | 85% |
| UA 2399United Airlines | 11:55am | 1:17pm | 31 | 80% |
| UA 2751United Airlines | 4:20pm | 5:41pm | 10 | 74% |
| UA 1379United Airlines | 4:24pm | 5:46pm | 21 | 71% |
| UA 2690United Airlines | 6:29pm | 7:50pm | 7 | 73% |
| UA 1911United Airlines | 7:56pm | 9:25pm | 21 | 87% |
| UA 2407United Airlines | 8:03pm | 9:24pm | 10 | 59% |
Is IAH to SAN on time?
From September 2025 to August 2026, 81% of 1,686 flights arrived within 15 minutes of schedule and 0.2% were cancelled. Flights leaving around 2pm were the most punctual (85%), those around 6pm the least (76%). Most delay time was caused by late-arriving aircraft (34%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,686 | 81% | 11 min | 0.2% |
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 |
|---|---|---|---|
| 9am to 10am | 365 | 85% | |
| 12pm to 1pm | 176 | 79% | |
| 2pm to 3pm | 185 | 85% | |
| 4pm to 5pm | 344 | 85% | |
| 6pm to 7pm | 213 | 76% | |
| 7pm to 8pm | 77 | 79% | |
| 8pm to 9pm | 286 | 77% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 140 | 19,517 | |
| September 2025 | 136 | 19,043 | |
| October 2025 | 146 | 20,478 | |
| November 2025 | 142 | 19,175 | |
| December 2025 | 145 | 20,366 | |
| January 2026 | 127 | 18,235 | |
| February 2026 | 127 | 18,519 | |
| March 2026 | 150 | 20,755 | |
| April 2026 | 142 | 21,755 | |
| May 2026 | 149 | 21,215 | |
| June 2026 | 142 | 21,291 | |
| July 2026 | 142 | 22,281 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.