Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from San Francisco to Seattle
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Delta flights from San Francisco to Seattle
Our best Delta deals on San Francisco to Seattle flight tickets
United Airlines flights from San Francisco to Seattle
Our best United Airlines deals on San Francisco to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from San Francisco to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
The cheapest month to fly to Seattle from San Francisco is in October. Flight prices, which tend to average around £148, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Seattle, with average flight prices from San Francisco averaging around £150.
What is the cheapest day to depart on your flight to Seattle?
According to our data, Monday is the cheapest day to fly to Seattle from San Francisco. The lowest ticket price found for a Monday departure recently was £170. 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 Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Wednesday is £301.
What is the cheapest time of day to depart on your flight to Seattle?
According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from San Francisco to Seattle at midday for as low as £226. 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 £273.
What is the cheapest San Francisco to Seattle/Tacoma Intl flight route?
Fly from San Francisco to Seattle/Tacoma Intl for the best San Francisco - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from San Francisco when booking 26 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £182 when searching 26 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 £117 on momondo.
What cabin class options are available on San Francisco to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on San Francisco to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How many flights depart from San Francisco to Seattle on average per day?
The number of flights available between San Francisco and Seattle is 89 per day as of May 2025. The most frequent departure time is 16:00, with 41% of daily flights leaving in the afternoon.
How many flights depart from San Francisco to Seattle on average per week?
As of May 2025, there are 627 flights per week flying from San Francisco to Seattle. The most common day of the week flights depart is Fri, with 18% of flights taking off on this day.
When to book flights from San Francisco to Seattle
Cheap San Francisco to Seattle (SFO to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to Seattle
How far is San Francisco to Seattle/Tacoma Intl by plane?
The straight-line distance from San Francisco to Seattle/Tacoma Intl is 678.2 mi. Typically, this will take 2h 04m by plane in normal conditions.
When did momondo last update prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?
Prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from San Francisco Airport to Seattle/Tacoma Intl Airport is 1 as of May 2025.
How old do you have to be to fly from San Francisco Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from San Francisco to Seattle?
momondo data reveals that the most frequently booked plane model on the route from San Francisco to Seattle is Boeing 737-800 Passenger/BBJ2 (winglets), representing 15.11% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 14.77%, Boeing 737-900 at 11.53%, and Boeing 737 MAX 9 at 8.65%.
What is the most popular airline from San Francisco to Seattle?
momondo data reveals that the most frequently booked airline on the route from San Francisco to Seattle is Alaska Airlines, representing 100% of all bookings.
Best airlines flying from San Francisco to Seattle
Compare and see reviews for airlines that fly from San Francisco to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £104 | Free Cancellation | Rating 8.0 10,000 reviews |
Alaska Airlines Flights From San Francisco to Seattle
Alaska Airlines flies from San Francisco to Seattle around 20 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from San Francisco to Seattle in the last 72 hours was £138 (round-trip), much lower than the average airfare cost of £239 for Alaska Airlines flights on this route.
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from San Francisco to Seattle?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from San Francisco.
Can I find flights from San Francisco to Seattle with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Seattle from San Francisco with this policy.
How can momondo help me find flights from San Francisco to Seattle?
momondo helps you find the best flight between San Francisco and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from San Francisco to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from San Francisco are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.