Cheap flights from Seattle to San Francisco from $78

If you aren’t able to travel to San Francisco during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $237.

The cheapest day to depart from Seattle to San Francisco is on a Friday when prices can be found for as low as $292. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $494.

Our data shows that the cheapest Seattle to San Francisco flights are usually those with departure times at noon. Our users have found flights to San Francisco at noon for as low as $319. Flights in the evening are often more expensive with an average ticket price of $381.

Fly from Seattle/Tacoma Intl to San Francisco for the best Seattle/Tacoma Intl - San Francisco flight prices

You are more likely to see cheaper flights to San Francisco from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $254 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Seattle for as low as $170 on momondo.

There are 4 cabin classes available to choose from on Seattle to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to San Francisco

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to San Francisco from Seattle according to our data. Alaska Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 7 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between Seattle and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 132 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

As of April 2026, 42 flights take off from Seattle and land in San Francisco each day. The most common flight departure time for this route is 5:00PM, with 48% of daily flights taking off at noon.

294 flights are operational weekly from Seattle to San Francisco as of April 2026. The most popular departure day for this route is Thu, with 25% of flights per week taking off on this day.