San Francisco (SFO) to Seattle (SEA) flights
Alaska Airlines, United Airlines, Delta Air Lines, SkyWest Airlines fly nonstop from San Francisco International Airport to Seattle-Tacoma International Airport, with about 149 flights a week in July 2026. The 679-mile flight takes about 2h 12m gate to gate.
- Distance
- 679 mi · 1,093 km
- Flight time
- 2h 12m
- Airlines
- 4
- Seats filled
- 83%
Airlines flying SFO to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 61 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 386,889 | 2h 13m |
| United Airlines | 47 | Airbus A320-100/200, Boeing 737-800, Airbus A319 | 267,254 | 2h 11m |
| Delta Air Lines | 21 | Airbus A220-300, Airbus A220-100, Boeing 737-800 | 91,499 | 2h 8m |
| SkyWest Airlines | 20 | Embraer E175 | 68,357 | 2h 15m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SFO to SEA flight schedule
28 flight numbers flew this route in August 2026, 19 of them almost daily. The first usually leaves at 6:00am and the last at 10:59pm. 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) |
|---|---|---|---|---|
| AS 580Alaska Airlines | 6:00am | 8:08am | 11 | 79% |
| AS 620Alaska Airlines | 6:03am | 8:13am | 31 | 88% |
| DL 2721Delta Air Lines | 6:20am | 8:31am | 31 | 95% |
| UA 1708United Airlines | 7:00am | 9:22am | 10 | 93% |
| AS 68Alaska Airlines | 7:03am | 9:13am | 31 | 84% |
| UA 1752United Airlines | 7:41am | 9:59am | 12 | 58% |
| AS 1327Alaska Airlines | 9:00am | 11:15am | 31 | 68% |
| UA 781United Airlines | 10:05am | 12:20pm | 21 | 48% |
| UA 2192United Airlines | 10:15am | 12:34pm | 10 | 46% |
| AS 656Alaska Airlines | 10:18am | 12:27pm | 26 | 54% |
| DL 2870Delta Air Lines | 10:40am | 12:51pm | 31 | 44% |
| UA 2744United Airlines | 12:05pm | 2:24pm | 27 | 75% |
| AS 630Alaska Airlines | 12:27pm | 2:35pm | 31 | 25% |
| UA 1265United Airlines | 1:55pm | 4:14pm | 27 | 58% |
| DL 1412Delta Air Lines | 2:00pm | 4:13pm | 31 | 74% |
| AS 790Alaska Airlines | 2:20pm | 4:31pm | 18 | 70% |
| AS 1340Alaska Airlines | 3:50pm | 6:00pm | 31 | 65% |
| UA 2279United Airlines | 4:10pm | 6:29pm | 31 | 76% |
| DL 3707Delta Air Lines · operated by SkyWest Airlines | 5:36pm | 7:55pm | 31 | 65% |
| AS 758Alaska Airlines | 5:38pm | 7:47pm | 31 | 67% |
| UA 2611United Airlines | 6:25pm | 8:43pm | 21 | 70% |
| UA 1577United Airlines | 6:28pm | 8:53pm | 10 | 68% |
| AS 591Alaska Airlines | 8:28pm | 10:41pm | 31 | 68% |
| AS 316Alaska Airlines | 8:53pm | 11:10pm | 11 | 68% |
| DL 3991Delta Air Lines · operated by SkyWest Airlines | 8:59pm | 11:19pm | 31 | 64% |
| UA 1007United Airlines | 9:07pm | 11:26pm | 25 | 65% |
| UA 5579United Airlines · operated by SkyWest Airlines | 10:45pm | 1:15am | 6 | 71% |
| UA 1389United Airlines | 10:59pm | 1:13am | 4 | 85% |
Is SFO to SEA on time?
From September 2025 to August 2026, 72% of 6,824 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 6am were the most punctual (92%), those around 10am the least (61%). Most delay time was caused by late-arriving aircraft (47%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 2,735 | 69% | 18 min | 1.3% |
| United Airlines | 2,336 | 75% | 15 min | 0.5% |
| Delta Air Lines | 1,750 | 74% | 16 min | 1.5% |
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 | 201 | 95% | |
| 6am to 7am | 445 | 92% | |
| 7am to 8am | 274 | 89% | |
| 8am to 9am | 192 | 58% | |
| 9am to 10am | 367 | 77% | |
| 10am to 11am | 713 | 61% | |
| 11am to 12pm | 192 | 80% | |
| 12pm to 1pm | 371 | 65% | |
| 1pm to 2pm | 427 | 76% | |
| 2pm to 3pm | 590 | 73% | |
| 4pm to 5pm | 716 | 74% | |
| 5pm to 6pm | 287 | 59% | |
| 6pm to 7pm | 608 | 73% | |
| 7pm to 8pm | 291 | 75% | |
| 8pm to 9pm | 528 | 64% | |
| 9pm to 10pm | 237 | 63% | |
| 10pm to 11pm | 269 | 71% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 616 | 80,172 | |
| September 2025 | 581 | 69,912 | |
| October 2025 | 579 | 65,933 | |
| November 2025 | 561 | 65,523 | |
| December 2025 | 554 | 65,013 | |
| January 2026 | 477 | 53,839 | |
| February 2026 | 477 | 55,905 | |
| March 2026 | 512 | 61,925 | |
| April 2026 | 496 | 61,008 | |
| May 2026 | 590 | 72,106 | |
| June 2026 | 629 | 80,651 | |
| July 2026 | 665 | 82,930 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.