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

Popular airlines from Seattle-Tacoma International Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal)

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Flights from Seattle (SEA) to San Diego (SDM)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Brown Field Municipal
Distance
1064 mi

Seattle to San Diego Flights

The cheapest times to fly from Seattle to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to San Diego are during the month of . You can find some of the cheapest flights from Seattle to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to San Diego

Sunday is one of the best days to book for cheap flights from Seattle to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal) cost?
Discover the latest flight deals from SEA to SDM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to SDM?
The cheapest flights from SEA to SDM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to SDM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SEA to SDM. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with Expedia’s filter tool. Enter your dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from SEA to SDM?
Usually you’ll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal)?
Select a flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for San Diego County from Seattle - Tacoma Intl. Airport (SEA)?
Compare your flight options from Seattle - Tacoma Intl. Airport (SEA) to San Diego Intl. Airport (SAN). This is the only airport in San Diego County you can fly into if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal) last-minute?
Booking your ticket from SEA to SDM shortly before your trip is generally more expensive. But if you’re flexible with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a SEA to SDM flight and hotel package?
You’ll typically save money by securing a SEA to SDM flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one convenient place. Once you’ve selected your preferred accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego, CA (SDM-Brown Field Municipal)?
If you reserved your SEA to SDM 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 fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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*Available to One Key members.