Cheap flights from Seattle to San Francisco from C$ 109

The cheapest month to fly to San Francisco from Seattle is in January. Flight prices, which tend to average around C$ 260, are often lower during this time because this is during the off-season. The month of October is another great option to travel to San Francisco, with average flight prices from Seattle averaging around C$ 331.

The cheapest day to depart from Seattle to San Francisco is on a Wednesday. Travellers who choose to depart for San Francisco on a Wednesday will often find tickets for as low as C$ 292. On the other hand, Monday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,550.

Flying to San Francisco from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as C$ 754 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to San Francisco is in the evening when prices are around C$ 1,158.

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 C$ 381 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 C$ 262 on momondo.

There are 3 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 September 2026, prices for Seattle to San Francisco flights are approximately 1% cheaper when compared to flights at the same time last year.

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

Alaska Airlines, Delta and Southwest 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 67% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 5 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 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 126 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. Friday 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 28% of their flights experiencing any sort of delay.

47 flights are operational daily from Seattle to San Francisco as of September 2026. The most popular departure time for this route is 5:00p.m., with 44% of flights per day taking off in the afternoon.

As of September 2026, there are 330 flights per week flying from Seattle to San Francisco. The most common day of the week flights depart is Thu, with 25% of flights taking off on this day.