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Cheap Flight Deals from Seattle to San Diego

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Round TripOne Way
SEA Seattle
SAN San Diego
From $112.79
Jan 28, 2026 - Feb 2, 2026
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SEA Seattle
SAN San Diego
From $565.99
Dec 30, 2025 - Jan 3, 2026
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*All fares above were last found on:
Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions.

When’s a good time to book a flight from Seattle to San Diego?

What’s the cheapest day of the week to fly from Seattle to San Diego?‡

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What is the cheapest month to fly from Seattle to San Diego?‡

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‡This information is based on historical data from the last 365 days.

Finding Affordable Flights from Seattle to San Diego
  • Plan Ahead - One of the keys to securing cheap flights from Seattle to San Diego is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
  • Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
  • Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from Seattle to San Diego drop, giving you the opportunity to grab cheap deals.
  • Consider Nearby Airports - If San Diego has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
  • Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.

When is the Cheapest Time to Book Flights from Seattle to San Diego?

‡

Got flexible travel dates? Use our flight data from the past year to discover ideal times to fly from Seattle to San Diego. Find out which months and days typically offer lower fares and score our best savings.

CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip

‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.

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Seattle to San Diego Flight Route Information

Travel Distance:1,052 Miles
Airlines Flying This Route: Alaska Airlines, Delta Air Lines, Korean Air
Weekly Flights:101
Avg. Flight Duration:03.51 Hours

Insights About Flying from Seattle to San Diego

Q. Which is the high season to travel from Seattle to San Diego?

A. The month of August is considered the high season for flying from SEA to SAN. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.

Q. How many direct flights are available from SEA to SAN?

A. There are a total of 405 direct flights from Seattle to San Diego. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.

Q. Which is the low season to travel from Seattle to San Diego?

A. April is considered the low season for traveling from Seattle to San Diego, California. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.

Q. How many daily flights are there between Seattle to San Diego?

A. There are as many as 13 daily flights available for travelers between SEA to SAN. This data offers flexibility in choosing departure times that best suit your schedule.

Q. Which is the busiest day for passengers flying between Seattle to San Diego?

A. Monday are the busiest days for passengers flying between Seattle to San Diego. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.

Q. At what time does the last flight depart to San Diego?

A. The last flight to San Diego typically departs between 9:00PM - 10:00PM. Travelers who prefer late-night departures will find this information valuable for planning their journey.

Q. What percentage of travelers spent an average of 2 days in San Diego, California?

A. Approximately 38.24% of travelers spent an average of 2 days exploring San Diego. This information can assist in planning the duration of your stay in San Diego

Q. What percentage of SEA to SAN flyers traveled with kids under 14?

A. About 4% of passengers on flights from Seattle to San Diego were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.

Q. What percentage of Seattle to San Diego travelers were over 60 years old?

A. A notable 19% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.

Q. What percentage of SEA to SAN travelers were millennials?

A. Millennials make up a significant portion of travelers on this route, accounting for 38% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.

Q. What percentage of Seattle to San Diego travelers were female?

A. Almost half of the passengers, approximately 53% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.

Q. At what time the earliest flight departs from Seattle?

A. The earliest flight departs at 7:00AM - 8:00AM.

Q. On which days one can have the most flight options in San Diego?

A. Monday offer the most flight options in San Diego.

§ All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.

Cheap Flights from Seattle to San Diego

Flights from Seattle to San Diego

Looking for flights from Seattle to San Diego? Look no more, for you're at the right place. Book cheap flights from Seattle to San Diego on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab SEA to SAN flight deals, and save big!

Airports in Seattle

The city of Seattle in Washington, US is served by three airports. They are Seattle-Tacoma International Airport, Kenmore Air Harbor Seaplane Base and Boeing Field or King County International Airport. Seattle-Tacoma International Airport, also known as Sea-Tac Airport or Sea-Tac, is the primary commercial airport serving the Seattle Metropolitan area. it serves scheduled flights to multiple destinations in cities throughout North America, Europe, the Middle East and Asia. Passengers can avail seamless connectivity between the airport and the city through bicycle resources, buses, shuttles, courtesy shuttles, public transit, rental cars, taxis, limos, and app-based ridesharing services.

Explore San Diego

Famous as the 'Birthplace of California', San Diego is the oldest and second largest city in the US state of California. The city is scenically situated along the Pacific Ocean and attracts millions of visitors every year for its mild year-round climate, scenic natural harbor and miles of sunny beaches. San Diego is also famous for its Spanish Colonial architecture and US Navy, the latter being ascribed to the presence of a large active naval fleet. Visitors can visit here to see the USS Midway, a famous Second World War aircraft carrier of US Navy that is now turned into a museum.

Things to do in San Diego

San Diego Model Railroad Museum

The San Diego Model Railroad Museum is the largest indoor a model railroad exhibit in North America, and one of the largest of its kind in the world. Spread across a massive 27000 square feet area, it flaunts some of the largest HO and N scale (a rail transport modeling scale) engine layouts.

Mission Basilica San Diego de Alcala

The Mission San Diego de Alcala is the first of the twenty-one missions installed by the Spanish conquistadors in California. It is named after a 15th-century saint, Saint Diego and was founded in 1769. It is best known for its 46-foot tall bell wall, which holds five bells. The largest of them all is Mater Dolorosa and it weighs 1200 pounds.

Timken Museum of Art

Established in 1965, the Timken Museum of Art is a state-of-the-art fine art museum located in San Diego. It is home to a remarkable collation of European old master paintings, sculptures, and tapestries under natural light. This collection is furthered by collections of paintings by American, Italian and Russian artists.

Best Time to Fly to San Diego

The best time to fly to San Diego is the summer season from June to August. The city's beaches are full of tourists and the city is red hot with festivals like Comic-Con (that sweeps the entire city) and San Diego County Fair.

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