Whether you're traveling for business or pleasure, solo, or with the whole family, you'll enjoy the flexibility of flying Southwest®.
Find your next flight from Seattle/Tacoma to San Diego now!
Looking for low fares? Check out this upcoming flight:
Seattle/Tacoma, WA to San Diego, CA
*Restrictions and exclusions apply. Seats and dates are limited. Select markets. 16 travel days available. Fares are updated hourly. Fares displayed on external channels may no longer be available at time of booking. To find the most updated fare, please visit Southwest.com.
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Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.
Find low faresTravel tips for your next Southwest flight
How to board the plane earlier:
Southwest seats are first come, first served based on check-in order. But there are ways to board the plane earlier!
- Purchase EarlyBird Check-In®1 for automatic check-in and a better boarding position.
Enjoy movies, sips, and snacks during your flight.
Take advantage of inflight entertainment with free movies4, free live TV5, free texting6, and $8 inflight Internet7.
We also offer free sodas, coffee, and snacks8—learn more about the inflight food and beverage experience.
Take advantage of free same-day standby9.
Have a change of travel plans? We offer free same-day standby for all fare types. This means that you can retain your current flight while listing for standby on an earlier flight. If a seat becomes available, it’s yours at no charge!
Make the most of our Rapid Rewards® Program.
Rapid Rewards Members can redeem their points for flights, hotel stays, rental cars, gift cards, and more. And your points never expire!
| Fare | Fly one-way from $139 (departing on 4/23)* |
|---|---|
| Departing from | Seattle-Tacoma International Airport (SEA) |
| Arriving at | San Diego International Airport (SAN) |
| Average flight time | Unavailable |
| Distance | 1050 miles |
| 130† | Weekly flights |
|---|---|
| 0 | Nonstop flight per day Monday through Friday |
| 0 | Nonstop flight on Saturday |
| 0 | Nonstop flight on Sunday |
Other popular flights from Seattle/Tacoma:
†Weekly flights based on DOT published scheduled average flights Monday through Sunday between 3/1/2025 and 3/31/2025. Note: route may not operate every day of the week.
Explore San Diego.
Imagine yourself in San Diego, California—and then make it happen! Whether you’re visiting for business, pleasure, or a mix of both, Southwest offers a variety of travel options to help you transform your California dream into a reality. San Diego is located in the southernmost region of the state along the bucolic, surfer-friendly Pacific coastline. The weather here is warm and inviting, with temperatures averaging in the 70s year round. But believe it or not, San Diego holds a few gems that outshine the sunshine. From stunning beaches with breathtaking views to an exceptional restaurant scene and more, San Diego delights visitors and residents alike with its irresistible charm, making it hard to ever leave.
Explore San Diego’s top sites during your trip. For starters, this city is home to the world-famous San Diego Zoo. See the zoo during your trip, and learn the stories of more than 3,700 animals. If you’re an ocean and/or history lover, San Diego’s Maritime Museum is a must see. At the museum, you can explore the decks of The Star of India, the world’s oldest active sailing ship.
Maybe you’re in the mood to chill and relax during your trip. If so, San Diego is the right place for that. Spend a day at one of San Diego’s beaches to soak up some sun—and some of the most beautiful coastal views the country has to offer. Looking for a bite to eat? The restaurant scene is exceptional. Just a stone’s throw from Mexico, it’s no surprise that you can find delicious Mexican cuisine in San Diego, ranging from high-end to casual restaurants. Before your trip ends, make sure to visit Balboa Park. With 16 museums, multiple performing art centers, trails, gardens, and more, Balboa Park is an excellent spot for families, solo travelers, and so much more.
Questions we hear the most
There are 130 weekly flights from Seattle/Tacoma to San Diego on Southwest Airlines.
To find the lowest fares by day and time to fly Seattle/Tacoma to San Diego with Southwest, check out our Low Fare Calendar.
You can rent a car at San Diego International Airport—book yours with your flight.
Yes! Flights from Seattle/Tacoma to San Diego—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Visit the Southwest Airlines® Help Center for helpful information and answers to frequently asked questions.
1EarlyBird Check-In® pricing starts at $15 one-way, and is subject to availability. Pricing may vary based on the popularity and length of each (one-way) flight. Please see optional travel charges for more details.
2Upgraded boarding prices and benefits are per eligible segment. Flights must be within 24 hours of departure to be eligible for upgraded boarding.
4Where available. Available only on WiFi-enabled aircraft. Limited-time offer.
5Due to licensing restrictions, on WiFi-enabled international flights, free live TV and iHeartRadio may not be available for the full duration of flight.
6Texting only allows access to iMessage and WhatsApp (which must be downloaded and activated before connecting to SouthwestWiFi).
7Internet access for $8 per device from takeoff to landing. Price is subject to change. May not be available for the full duration of flight. In order to provide a top-notch Internet experience, we prohibit access to certain high-bandwidth applications and websites. We also prohibit access to certain obscene or offensive content.
8Flights traveling 175 miles or less will have only water available. Complimentary snacks are served on flights over 175 miles. If you’re flying between Hawaii and the continental U.S., you’ll have even more snacks to choose from.
9Free same-day standby: You can list for same-day standby for an earlier flight via a Southwest Customer Service Agent at the airport or the Southwest app or mobile web. You must request to be added to the same-day standby list at least 10 minutes prior to the scheduled departure of your original flight or the no-show policy will apply. If using the app or mobile web, you must list your name 30 minutes ahead of scheduled departure. You will receive a message based on the contact preference selected during booking if you are cleared on the flight. Group bookings and Unaccompanied Minors are not eligible for same-day standby. You will be required to pay any government taxes and fees associated with these itinerary changes but refunds will be provided. Your original boarding position is not guaranteed on your standby flight. Southwest Business Customers booked through travel agencies may need to see a Southwest agent at the airport for a standby listing. See Southwest.com/standby for more details.