Cheap flights from Seattle to San Francisco from $135

If you aren’t able to travel during the month of January, then book flights to San Francisco from Seattle during September instead. Flights to San Francisco in September, while not as cheap as those in January, still average around $350.

According to our data, Friday is the cheapest day to fly to San Francisco from Seattle. The lowest ticket price found for a Friday departure recently was $883. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to San Francisco for around $1,958.

According to our data, the cheapest time of day to fly to San Francisco is in the morning. momondo users have found flights departing from Seattle to San Francisco in the morning for as low as $380. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,827 on average. Flights to San Francisco from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 $392 when searching weeks before you fly. 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 $266 on momondo.

There are 2 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.

No. A direct flight is the cheapest option for a flight between Seattle to San Francisco.

As of October 2026, prices for Seattle to San Francisco flights are approximately 21% cheaper when compared to flights at the same time last year.

Historically, on average around 31% 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 125 minutes.

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

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

According to our data, Delta have had the fewest delays on this route over the last 12 months, with about 28% of their flights experiencing any sort of delay.

As of October 2026, there are 54 flights per day flying from Seattle to San Francisco. The most common time of day flights depart is 17:00, with 39% of flights taking off at midday.

As of October 2026, there are 380 flights per week flying from Seattle to San Francisco. The most common day of the week flights depart is Mon, with 21% of flights taking off on this day.