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

View AU$142 flight on Fri, 11 Sept 2026Opens in a new window

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

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, 15 Sept - Tue, 22 Sept
SEA
Seattle
SAN
San Diego
AU$168 Return, found 6 days ago
AU$168
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 15 Sept from Seattle to San Diego, returning Tue, 22 Sept, priced at AU$168 found 6 days ago
Delta
Mon, 14 Sept - Mon, 21 Sept
SEA
Seattle
SAN
San Diego
AU$198 Return, found 3 days ago
AU$198
Return
found 3 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to San Diego, returning Mon, 21 Sept, priced at AU$198 found 3 days ago
Delta
Tue, 15 Sept - Tue, 22 Sept
SEA
Seattle
SAN
San Diego
AU$211 Return, found 6 days ago
AU$211
Return
found 6 days ago
Select Delta flight, departing Tue, 15 Sept from Seattle to San Diego, returning Tue, 22 Sept, priced at AU$211 found 6 days ago
Alaska Airlines
Tue, 15 Sept - Tue, 22 Sept
SEA
Seattle
SAN
San Diego
AU$225 Return, found 6 days ago
AU$225
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 15 Sept from Seattle to San Diego, returning Tue, 22 Sept, priced at AU$225 found 6 days ago
Delta
Sat, 19 Sept - Wed, 23 Sept
SEA
Seattle
SAN
San Diego
AU$239 Return, found 11 hours ago
AU$239
Return
found 11 hours ago
Select Delta flight, departing Sat, 19 Sept from Seattle to San Diego, returning Wed, 23 Sept, priced at AU$239 found 11 hours ago
Alaska Airlines
Tue, 15 Sept - Tue, 22 Sept
SEA
Seattle
SAN
San Diego
AU$244 Return, found 6 days ago
AU$244
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 15 Sept from Seattle to San Diego, returning Tue, 22 Sept, priced at AU$244 found 6 days ago
Alaska Airlines
Fri, 11 Sept - Fri, 18 Sept
SEA
Seattle
SAN
San Diego
AU$254 Return, found 6 days ago
AU$254
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 11 Sept from Seattle to San Diego, returning Fri, 18 Sept, priced at AU$254 found 6 days ago
Alaska Airlines
Mon, 14 Sept - Mon, 21 Sept
SEA
Seattle
SAN
San Diego
AU$263 Return, found 3 days ago
AU$263
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 14 Sept from Seattle to San Diego, returning Mon, 21 Sept, priced at AU$263 found 3 days ago
American Airlines
Tue, 15 Sept - Tue, 22 Sept
SEA
Seattle
SAN
San Diego
AU$344 Return, found 6 days ago
AU$344
Return
found 6 days ago
Select American Airlines flight, departing Tue, 15 Sept from Seattle to San Diego, returning Tue, 22 Sept, priced at AU$344 found 6 days ago
United
Sat, 19 Sept - Wed, 23 Sept
SEA
Seattle
SAN
San Diego
AU$397 Return, found 11 hours ago
AU$397
Return
found 11 hours ago
Select United flight, departing Sat, 19 Sept from Seattle to San Diego, returning Wed, 23 Sept, priced at AU$397 found 11 hours ago

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

October is typically the cheapest month to fly

From AU$166 - AU$223 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find cheap one-way flights from AU$142 and cheap return flights from AU$168 SEA to SAN with Expedia. One-way flights typically cost between AU$190 and AU$849 and return flights often range between AU$775 and AU$2,206. 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 SEA to SAN ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
If you're looking for the best time to find a deal, January is typically the cheapest month to fly from Seattle-Tacoma International Airport (SEA) to San Diego International Airport (SAN). You can expect average return flight prices around AU$297 during this time. January often sees lower prices because it falls after the busy holiday travel season, when demand for flights tends to decrease. Other budget-friendly months to consider for this route include September and October.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
There are 3 airlines offering direct flights from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN). Here are some of the top carriers:
  • Delta operates 35 direct flights from Seattle - Tacoma Intl. to San Diego Intl. every week.
  • Southwest Airlines operates 11 direct flights from Seattle - Tacoma Intl. to San Diego Intl. every week.
  • American Airlines operates 7 direct flights from Seattle - Tacoma Intl. to San Diego Intl. every week.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
American Airlines is one of the cheapest airlines offering nonstop return flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.), with tickets starting from around AU$298 for flights that can be booked for departure within the next year. Sun Country Airlines offers one of the cheapest connecting return flights on this route, with tickets starting from around AU$384. These prices are for economy/coach class per adult. 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 Seattle, WA (SEA) to San Diego, CA (SAN)?
To find a cheap flight from Seattle, WA (SEA) to San Diego, CA (SAN), 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego 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. Alaska Airlines offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego 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 Seattle, WA (SEA) to San Diego, CA (SAN)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You'll find approximately 7 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN). For even more choices, look at flights that include layovers, as there are around 110 connecting flights per day. Some common connection points include San Francisco Intl. (SFO), Denver Intl. (DEN), and Portland Intl. (PDX).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN) typically departs around 12:05 AM local time, operated by American Airlines. This is a seasonal service, active in February and March. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You'll find the most flights from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN) on Thursdays, with around 124 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, United, and Southwest Airlines. Thursdays offer notably more flight options compared to other days of the week, so if flexibility is key, this might be a good day to consider flying.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN) 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 because you can get an early start on your day in San Diego.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
A non-stop flight from Seattle - Tacoma Intl. (SEA) to San Diego Intl. (SAN) typically takes around 3 hours. This route covers a distance of approximately 1,691 kilometers. If you opt for a one-stop flight, your travel time will be longer, usually around 6 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Diego, CA (SAN-San Diego Intl.)?
Yes, you can fly business class or first class between Seattle - Tacoma Intl. (SEA) and San Diego Intl. (SAN).Airlines that offer business class service on this route include:
  • Alaska Airlines
  • Frontier Airlines
  • Delta
  • American Airlines
First class cabins are available on:
  • Alaska Airlines
  • United
  • Delta
  • Hawaiian Airlines
  • American Airlines
How do I earn miles on a Seattle, WA (SEA) to San Diego, CA (SAN) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA) to San Diego, CA (SAN) 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.
What airports do you fly into for San Diego, CA (SAN) from Seattle, WA (SEA)?
If you're planning to travel to San Diego from Seattle - Tacoma Intl. (SEA), you can fly directly into San Diego Intl. (SAN). Some flights may connect through major hubs like San Francisco Intl. (SFO), Denver Intl. (DEN), or Los Angeles Intl. (LAX) before reaching San Diego. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA) to San Diego, CA (SAN) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA) to San Diego, CA (SAN) 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 Seattle, WA (SEA) to San Diego, CA (SAN) flight and hotel package?
Securing a Seattle, WA (SEA) to San Diego, CA (SAN) 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 Seattle, WA (SEA) to San Diego, CA (SAN)?
If you booked your Seattle, WA (SEA) to San Diego, CA (SAN) 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
Seattle - Tacoma Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$168
Distance
1681 km
Average flight time
2 hours 50 mins

Book with confidence

Your quick guide to flights from Seattle to San Diego

Pick up great flights from Seattle to San Diego

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to San Diego. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to San Diego that take around hours.

Find cheap flights from Seattle to San Diego

From the great flight deals with prices currently ranging from AU$168 to AU$397, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to San Diego around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to San Diego is normally in September.

Reasons to book your flight from Seattle to San Diego with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to San Diego across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to San Diego right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Seattle to San Diego

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