Seattle (SEA) to San Francisco (SFO) flights
Alaska Airlines, United Airlines, Delta Air Lines, SkyWest Airlines fly nonstop from Seattle-Tacoma International Airport to San Francisco International Airport, with about 149 flights a week in July 2026. The 679-mile flight takes about 2h 17m gate to gate.
- Distance
- 679 mi · 1,093 km
- Flight time
- 2h 17m
- Airlines
- 4
- Seats filled
- 82%
Airlines flying SEA to SFO
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 61 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 390,074 | 2h 16m |
| United Airlines | 47 | Airbus A320-100/200, Boeing 737-800, Boeing 737 MAX 8 | 256,746 | 2h 16m |
| Delta Air Lines | 21 | Airbus A220-300, Airbus A220-100, Boeing 737-800 | 96,391 | 2h 18m |
| SkyWest Airlines | 20 | Embraer E175 | 69,578 | 2h 22m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to SFO flight schedule
28 flight numbers flew this route in August 2026, 19 of them almost daily. The first usually leaves at 5:15am and the last at 9:30pm. 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 5676United Airlines · operated by SkyWest Airlines | 5:15am | 7:35am | 7 | 87% |
| UA 1578United Airlines | 7:00am | 9:18am | 10 | 18% |
| AS 725Alaska Airlines | 7:03am | 9:20am | 31 | 51% |
| UA 499United Airlines | 7:11am | 9:30am | 21 | 52% |
| DL 2870Delta Air Lines | 7:20am | 9:36am | 31 | 32% |
| AS 528Alaska Airlines | 8:53am | 11:09am | 31 | 50% |
| UA 2831United Airlines | 9:05am | 11:24am | 31 | 30% |
| DL 1412Delta Air Lines | 10:35am | 12:57pm | 31 | 60% |
| AS 688Alaska Airlines | 10:40am | 12:56pm | 13 | 53% |
| UA 1482United Airlines | 10:55am | 1:15pm | 23 | 66% |
| AS 655Alaska Airlines | 11:42am | 2:04pm | 31 | 67% |
| UA 2281United Airlines | 1:16pm | 3:32pm | 21 | 52% |
| AS 680Alaska Airlines | 1:20pm | 3:31pm | 31 | 66% |
| DL 3707Delta Air Lines · operated by SkyWest Airlines | 2:35pm | 4:56pm | 31 | 69% |
| UA 2478United Airlines | 3:30pm | 5:45pm | 21 | 62% |
| UA 2866United Airlines | 3:33pm | 5:47pm | 6 | 56% |
| AS 1385Alaska Airlines | 4:36pm | 6:48pm | 30 | 68% |
| UA 2164United Airlines | 5:20pm | 7:37pm | 6 | 45% |
| UA 737United Airlines | 5:20pm | 7:42pm | 31 | 54% |
| AS 791Alaska Airlines | 5:36pm | 7:52pm | 18 | 31% |
| DL 3991Delta Air Lines · operated by SkyWest Airlines | 5:51pm | 8:19pm | 31 | 60% |
| AS 619Alaska Airlines | 6:36pm | 8:48pm | 31 | 33% |
| UA 2241United Airlines | 7:05pm | 9:21pm | 10 | 22% |
| UA 656United Airlines | 7:35pm | 9:57pm | 15 | 60% |
| AS 628Alaska Airlines | 7:42pm | 9:54pm | 30 | 22% |
| AS 590Alaska Airlines | 8:42pm | 10:55pm | 26 | 52% |
| AS 411Alaska Airlines | 9:25pm | 11:40pm | 11 | 60% |
| DL 2635Delta Air Lines | 9:30pm | 11:50pm | 31 | 70% |
Is SEA to SFO on time?
From September 2025 to August 2026, 60% of 6,822 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 3pm were the most punctual (69%), those around 7pm the least (46%). Most delay time was caused by air traffic control and airport congestion (57%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 2,735 | 56% | 24 min | 1.1% |
| United Airlines | 2,334 | 62% | 26 min | 0.9% |
| Delta Air Lines | 1,749 | 63% | 21 min | 1.4% |
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 | 221 | 93% | |
| 7am to 8am | 884 | 51% | |
| 8am to 9am | 498 | 48% | |
| 9am to 10am | 228 | 58% | |
| 10am to 11am | 293 | 46% | |
| 11am to 12pm | 516 | 69% | |
| 12pm to 1pm | 144 | 79% | |
| 1pm to 2pm | 704 | 65% | |
| 2pm to 3pm | 232 | 67% | |
| 3pm to 4pm | 476 | 69% | |
| 4pm to 5pm | 153 | 71% | |
| 5pm to 6pm | 892 | 60% | |
| 6pm to 7pm | 160 | 38% | |
| 7pm to 8pm | 576 | 46% | |
| 8pm to 9pm | 384 | 57% | |
| 9pm to 10pm | 396 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 613 | 81,875 | |
| September 2025 | 581 | 72,089 | |
| October 2025 | 579 | 69,955 | |
| November 2025 | 557 | 64,149 | |
| December 2025 | 561 | 65,757 | |
| January 2026 | 482 | 57,105 | |
| February 2026 | 480 | 56,442 | |
| March 2026 | 517 | 60,508 | |
| April 2026 | 495 | 60,551 | |
| May 2026 | 582 | 66,139 | |
| June 2026 | 628 | 74,373 | |
| July 2026 | 661 | 84,368 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.