Cheap flights from San Francisco to Seattle from C$ 136

If you aren’t able to travel to Seattle during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 354.

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 330. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around C$ 855. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

Our most recent data shows that the best time of day to fly to Seattle is in the morning. Flights from San Francisco to Seattle during this time can be as low as C$ 422. Flights in the afternoon are often more expensive with an average ticket price of C$ 855.

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

You are more likely to see cheaper flights to Seattle from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 377 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Francisco for as low as C$ 278 on momondo.

There are 3 cabin classes available to choose from on San Francisco to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 14% of flights between San Francisco and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 134 minutes.

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

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

According to our data, Delta has had the least delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

As of May 2026, there are 55 flights per day flying from San Francisco to Seattle. The most common time of day flights depart is 6:00p.m., with 41% of flights taking off in the afternoon.

As of May 2026, 390 flights take off from San Francisco and land in Seattle each week. The most common flight departure day for this route is Fri, with 22% of weekly flights taking off on this day.