Houston (IAH) to San Francisco (SFO) flights
United Airlines flies nonstop from George Bush Intercontinental Airport to San Francisco International Airport, with about 68 flights a week in July 2026. The 1,635-mile flight takes about 4h 8m gate to gate.
- Distance
- 1,635 mi · 2,631 km
- Flight time
- 4h 8m
- Airlines
- 1
- Seats filled
- 85%
Airlines flying IAH to SFO
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 68 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 777-200ER/200LR/233LR | 612,098 | 4h 8m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAH to SFO flight schedule
13 flight numbers flew this route in August 2026, 8 of them almost daily. The first usually leaves at 5:22am and the last at 10:20pm. 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 487United Airlines | 5:22am | 7:22am | 10 | 97% |
| UA 1768United Airlines | 7:20am | 9:30am | 31 | 89% |
| UA 2744United Airlines | 8:30am | 10:42am | 31 | 69% |
| UA 2358United Airlines | 10:10am | 12:14pm | 31 | 72% |
| UA 2611United Airlines | 12:40pm | 2:49pm | 21 | 77% |
| UA 2756United Airlines | 12:58pm | 3:03pm | 10 | 62% |
| UA 589United Airlines | 2:48pm | 4:57pm | 31 | 80% |
| UA 382United Airlines | 4:20pm | 6:29pm | 31 | 76% |
| UA 1341United Airlines | 6:05pm | 8:10pm | 10 | 60% |
| UA 2461United Airlines | 6:05pm | 8:10pm | 18 | 89% |
| UA 1976United Airlines | 7:35pm | 9:44pm | 6 | 40% |
| UA 1691United Airlines | 7:36pm | 9:45pm | 21 | 76% |
| UA 1609United Airlines | 10:20pm | 12:27am | 25 | 81% |
Is IAH to SFO on time?
From September 2025 to August 2026, 78% of 3,578 flights arrived within 15 minutes of schedule and 0.4% were cancelled. Flights leaving around 5am were the most punctual (97%), those around 6pm the least (65%). Most delay time was caused by air traffic control and airport congestion (49%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 3,578 | 78% | 14 min | 0.4% |
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 | 343 | 97% | |
| 7am to 8am | 365 | 89% | |
| 8am to 9am | 156 | 72% | |
| 9am to 10am | 201 | 72% | |
| 10am to 11am | 164 | 72% | |
| 12pm to 1pm | 358 | 78% | |
| 2pm to 3pm | 283 | 84% | |
| 3pm to 4pm | 274 | 78% | |
| 4pm to 5pm | 312 | 79% | |
| 6pm to 7pm | 355 | 65% | |
| 7pm to 8pm | 112 | 52% | |
| 8pm to 9pm | 233 | 65% | |
| 9pm to 10pm | 332 | 82% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 297 | 47,678 | |
| September 2025 | 289 | 44,070 | |
| October 2025 | 305 | 48,447 | |
| November 2025 | 300 | 49,079 | |
| December 2025 | 310 | 56,342 | |
| January 2026 | 304 | 52,108 | |
| February 2026 | 279 | 46,356 | |
| March 2026 | 307 | 53,809 | |
| April 2026 | 300 | 51,585 | |
| May 2026 | 307 | 55,070 | |
| June 2026 | 302 | 53,475 | |
| July 2026 | 299 | 54,079 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.