Cheap flights from San Francisco to Seattle from £69

The cheapest month to fly to Seattle from San Francisco is in February. Flight prices, which tend to average around £156, are often lower during this time because this is during the off-season. The month of October is another great option to travel to Seattle, with average flight prices from San Francisco averaging around £189.

According to our data, Wednesday is the cheapest day to fly to Seattle from San Francisco. The lowest ticket price found for a Wednesday departure recently was £221. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Friday is £591.

According to our data, the cheapest time of day to fly to Seattle is in the morning. momondo users have found flights departing from San Francisco to Seattle in the morning for as low as £280. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £438.

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 £201 when searching weeks before you fly. 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 £148 on momondo.

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 135 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 have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

The number of flights available between San Francisco and Seattle is 63 per day as of May 2026. The most frequent departure time is 18:00, with 39% of daily flights leaving in the afternoon.

As of May 2026, there are 446 flights per week flying from San Francisco to Seattle. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.