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£82 Cheap Flights from San Diego (SAN) to Seattle (SEA)

View £82 flight on Wed, 16 Sept 2026Opens in a new window

Popular airlines from San Diego Intl. Airport (SAN) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from San Diego (SAN) to Seattle (SEA)

Prices were available within the past 7 days and start at £82 for one-way flights and £117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, 11 Aug - Wed, 26 Aug
SAN
San Diego
SEA
Seattle
£117 Return, found 10 hours ago
£117
Return
found 10 hours ago
Select Alaska Airlines flight, departing Tue, 11 Aug from San Diego to Seattle, returning Wed, 26 Aug, priced at £117 found 10 hours ago
Alaska Airlines
Thu, 22 Oct - Mon, 26 Oct
SAN
San Diego
SEA
Seattle
£132 Return, found 13 hours ago
£132
Return
found 13 hours ago
Select Alaska Airlines flight, departing Thu, 22 Oct from San Diego to Seattle, returning Mon, 26 Oct, priced at £132 found 13 hours ago
Alaska Airlines
Tue, 11 Aug - Wed, 26 Aug
SAN
San Diego
SEA
Seattle
£140 Return, found 10 hours ago
£140
Return
found 10 hours ago
Select Alaska Airlines flight, departing Tue, 11 Aug from San Diego to Seattle, returning Wed, 26 Aug, priced at £140 found 10 hours ago
Alaska Airlines
Fri, 4 Sept - Tue, 8 Sept
SAN
San Diego
SEA
Seattle
£141 Return, found 3 days ago
£141
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 4 Sept from San Diego to Seattle, returning Tue, 8 Sept, priced at £141 found 3 days ago
Alaska Airlines
Tue, 11 Aug - Wed, 26 Aug
SAN
San Diego
SEA
Seattle
£154 Return, found 10 hours ago
£154
Return
found 10 hours ago
Select Alaska Airlines flight, departing Tue, 11 Aug from San Diego to Seattle, returning Wed, 26 Aug, priced at £154 found 10 hours ago
Alaska Airlines
Tue, 11 Aug - Wed, 26 Aug
SAN
San Diego
SEA
Seattle
£157 Return, found 10 hours ago
£157
Return
found 10 hours ago
Select Alaska Airlines flight, departing Tue, 11 Aug from San Diego to Seattle, returning Wed, 26 Aug, priced at £157 found 10 hours ago
Alaska Airlines
Fri, 11 Sept - Sat, 19 Sept
SAN
San Diego
SEA
Seattle
£161 Return, found 4 days ago
£161
Return
found 4 days ago
Select Alaska Airlines flight, departing Fri, 11 Sept from San Diego to Seattle, returning Sat, 19 Sept, priced at £161 found 4 days ago
Alaska Airlines
Fri, 11 Sept - Sat, 19 Sept
SAN
San Diego
SEA
Seattle
£164 Return, found 4 days ago
£164
Return
found 4 days ago
Select Alaska Airlines flight, departing Fri, 11 Sept from San Diego to Seattle, returning Sat, 19 Sept, priced at £164 found 4 days ago
Alaska Airlines
Sat, 29 Aug - Wed, 2 Sept
SAN
San Diego
SEA
Seattle
£165 Return, found 4 days ago
£165
Return
found 4 days ago
Select Alaska Airlines flight, departing Sat, 29 Aug from San Diego to Seattle, returning Wed, 2 Sept, priced at £165 found 4 days ago
JetBlue Airways
Fri, 4 Sept - Tue, 8 Sept
SAN
San Diego
SEA
Seattle
£443 Return, found 3 days ago
£443
Return
found 3 days ago
Select JetBlue Airways flight, departing Fri, 4 Sept from San Diego to Seattle, returning Tue, 8 Sept, priced at £443 found 3 days ago

Find the cheapest month to fly from San Diego (SAN) to Seattle (SEA)

April is typically the cheapest month to fly

From £73 - £153 per traveller.

Frequently asked questions

How much does a flight from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from £82 and cheap return flights from £117 SAN to SEA with Expedia. One-way flights typically cost between £115 and £739, and return flights often range between £223 and £765. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when SAN to SEA ticket fares go up or down.
What is the cheapest month to fly from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
January is typically the cheapest month to fly from San Diego International Airport (SAN) to Seattle - Tacoma International Airport (SEA), with average return fares around £150. January sees lower prices because it falls after the holiday travel rush, when demand drops and airlines compete for bookings. September and October are also good months to find deals on this route.
Which airlines fly direct from San Diego, CA (SAN) to Seattle, WA (SEA)?
Enter SAN to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Delta also offers one of the cheapest connecting return flights from San Diego Intl. (SAN) to Seattle - Tacoma Intl. (SEA) starting from around £168. Delta is one of the cheapest airlines offering nonstop return flights from San Diego Intl. (SAN) to Seattle - Tacoma Intl. (SEA), with tickets starting from around £213 for flights that can be booked for departure within the next year. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Finding the absolute 'best' time to fly from San Diego International Airport (SAN) to Seattle-Tacoma International Airport (SEA) depends on what you're looking for! You'll find the cheapest flights in January and September, with average prices around £150 for a return flight. However, if you're looking for the most flight options and a high volume of departures, August and November are typically the most popular months to travel. While there isn't a single month that is both the cheapest and most popular, you can weigh up whether saving money or having more schedule flexibility is more important for your trip.
How many flights per day from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll find approximately 7 nonstop flights per day from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). For even more choices, look at flights that include layovers, as there are around 102 connecting flights per day. Some common connection points include San Francisco Intl. (SFO), Harry Reid Intl. (LAS), and Sky Harbor Intl. (PHX).
What is the earliest flight from San Diego, CA (SAN) to Seattle, WA (SEA)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from San Diego, CA (SAN) to Seattle, WA (SEA). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll find the most flights from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Friday, with around 140 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and United. Flight options are notably more on Fridays compared to other days of the week, offering you greater flexibility.
What are the most popular departure times for flights from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from San Diego Intl. (SAN) to Seattle - Tacoma Intl. (SEA) are in the early morning, from 6am to 9am. Many major carriers, including Alaska Airlines, Delta and Southwest Airlines, offer flights during this window. Many travellers prefer these times as it allows for an early start to their day in Seattle.
How long does it take to fly from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from SAN to SEA typically takes around 3 hours 20 minutes, covering approximately 1,691 kilometers. Connecting flights on this route usually add 5 hours 10 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly business class or first class between SAN and SEA. You can fly business class with Frontier Airlines and Delta.First class cabins are available on American Airlines, Delta, Hawaiian Airlines, Alaska Airlines, and United.
How do I earn miles on a San Diego, CA (SAN) to Seattle, WA (SEA) flight with Expedia?
It's easy to earn miles on a San Diego, CA (SAN) to Seattle, WA (SEA) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from San Diego, CA (SAN) to Seattle, WA (SEA) at the last minute?
Typically, booking a last minute flight from San Diego, CA (SAN) to Seattle, WA (SEA) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a San Diego, CA (SAN) to Seattle, WA (SEA) flight and hotel package?
Securing a San Diego, CA (SAN) to Seattle, WA (SEA) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your San Diego, CA (SAN-San Diego Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
San Diego Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, JetBlue Airways
Return price
£117
Distance
1681 km
Average flight time
2 hours 58 mins

Book with confidence

Compare flights from San Diego to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from San Diego to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from San Diego Intl. to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from San Diego Intl. (SAN) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from San Diego to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from San Diego Intl. to Seattle - Tacoma Intl. start at just £117 and range up to £443.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near San Diego and Seattle
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your San Diego to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from San Diego Intl. to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from San Diego to Seattle easily and book with confidence

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