Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
75 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → San Francisco
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportSFOSan FranciscoSan Francisco International Airport
San FranciscoSan Francisco International Airport- Distance
- 679 mi
- Estimated flight time
- ~1h 50m
Same local time in Seattle and San Francisco.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 18 flights a day, observed from October 2025 to September 2026.
- 18
- flights per day
- 21
- busiest month · Jun
- 15
- quietest month · Jan
- 1 hr 43 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 15Jan2026
- 17Feb
- 17Mar
- 16Apr
- 18May
- 21Jun
- 21Jul
- 21Aug
- 20Sep
- 18Oct2025
- 18Nov
- 18Dec
Airlines
Who flies it
Alaska Airlinesall year
United Airlinesall year
Delta Air Linesall year
SkyWest Airlinesall year
Horizon Airautumn
Southwest Airlinesnow and then
Through the day
Departure times
Local time in Seattle. Most departures between 07:00 and 10:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 19.4Mon
- 18.3Tue
- 16.9Wed
- 17.7Thu
- 19.1Fri
- 18.6Sat
- 16.7Sun
Fleet
Aircraft observed
- Boeing 737-900B73918%
- Boeing 737 MAX 9B39M16%
- Embraer 175E75L15%
- Boeing 737-800B73812%
- Airbus A320A32011%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 15 | 453 |
|
| February 2026 | 17 | 478 |
|
| March 2026 | 17 | 497 |
|
| April 2026 | 16 | 468 |
|
| May 2026 | 18 | 524 |
|
| June 2026 | 21 | 623 |
|
| July 2026 | 21 | 662 |
|
| August 2026 | 21 | 619 |
|
| September 2026 | 20 | 595 |
|
| October 2025 | 18 | 566 |
|
| November 2025 | 18 | 543 |
|
| December 2025 | 18 | 503 |
|
Airlines observed on this route
From observed callsign routes on SEA-SFO - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seattle: 132.
- Direct destinations observed from San Francisco: 130.
The airports on this route
San Francisco International Airport
San Francisco, United StatesSFO / KSFO
International hub · 130 direct destinations · 4 runways · longest runway 11,870 ft
81 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
BFI SFOKing County International Airport - Boeing FieldSeattle is about 6 mi from Seattle.View route →SEA OAKOakland San Francisco Bay AirportOakland is about 11 mi from San Francisco.View route →SEA SJCMineta San Jose International AirportSan Jose is about 30 mi from San Francisco.View route →PAE SFOSeattle Paine Field International AirportEverett is about 32 mi from Seattle.View route →
About the route from Seattle to San Francisco
The observed direct connection between Seattle–Tacoma International Airport (SEA) and San Francisco International Airport (SFO) covers approximately 679 mi. The estimated flight time is around 1h 50m. Alaska Airlines, Delta Air Lines, Horizon Air, SkyWest Airlines, Southwest Airlines and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from San Francisco by air?
- The great-circle distance between Seattle–Tacoma International Airport and San Francisco International Airport is approximately 679 mi.
- How long is the flight from Seattle to San Francisco?
- Based on the distance, the estimated flight time is about 1h 50m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to San Francisco?
- Yes, a direct connection between SEA and SFO has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, Delta Air Lines, Horizon Air, SkyWest Airlines, Southwest Airlines and United Airlines.
- How often is there a flight from Seattle to San Francisco?
- On average around 18 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 6,531 observed flights. Mainly Alaska Airlines, United Airlines, Delta Air Lines. That is an observation, not a timetable.
- What is the current time difference between Seattle and San Francisco?
- Same local time in Seattle and San Francisco.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.