Cheap flights from San Francisco to Seattle from $140

The month of February is, on average, the cheapest month to fly to Seattle from San Francisco, with most prices found around $297. If you are unable to visit Seattle during the month of February, then departing from San Francisco during the month October is also very affordable. Most momondo users find prices during this month for around $360.

The cheapest day to depart from San Francisco to Seattle is on a Wednesday. Travellers who choose to depart for Seattle on a Wednesday will often find tickets for as low as $262. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to Seattle for around $639.

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 $262. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seattle is in the evening when prices are around $527.

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 $384 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 $283 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 15% 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, United Airlines have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

As of May 2026, 54 flights take off from San Francisco and land in Seattle each day. The most common flight departure time for this route is 18:00, with 43% of daily flights taking off in the afternoon.

As of May 2026, 383 flights take off from San Francisco and land in Seattle each week. The most common flight departure day for this route is Fri, with 23% of weekly flights taking off on this day.