Cheap Flights from Seattle to San Diego

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Compare Seattle to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

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Flight deals from Seattle to San Diego

Looking for a cheap last-minute deal or the best return flight from Seattle to San Diego? If you want to travel next month, return fares start from $166. Find the lowest prices on one-way and return tickets right here.

San Diego.$166 per passenger.Departing Thu, 12 Nov, returning Sat, 5 Dec.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Thu, 12 Nov, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Sat, 5 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Sun, 31 Jan, returning Sat, 6 Feb.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Sun, 31 Jan, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Sat, 6 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Fri, 5 Mar, returning Mon, 8 Mar.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Fri, 5 Mar, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Mon, 8 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Wed, 10 Feb, returning Sat, 13 Feb.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 10 Feb, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Sat, 13 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Fri, 6 Nov, returning Tue, 10 Nov.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Fri, 6 Nov, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Tue, 10 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Sun, 10 Jan, returning Thu, 14 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Sun, 10 Jan, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Thu, 14 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Fri, 11 Dec, returning Sat, 9 Jan.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Fri, 11 Dec, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Sat, 9 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Thu, 10 Dec, returning Sat, 12 Dec.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Thu, 10 Dec, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Sat, 12 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Thu, 1 Oct, returning Tue, 13 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Thu, 1 Oct, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Tue, 13 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Fri, 26 Feb, returning Mon, 1 Mar.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Fri, 26 Feb, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Mon, 1 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$166 per passenger.Departing Thu, 29 Oct, returning Thu, 5 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Thu, 29 Oct, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Thu, 5 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $166, select.

San Diego.$217 per passenger.Departing Wed, 30 Sep, returning Mon, 5 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Wed, 30 Sep, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Mon, 5 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $217, select.

San Diego.$349 per passenger.Departing Mon, 28 Sep, returning Wed, 30 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 28 Sep, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Wed, 30 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $349, select.

San Diego.$407 per passenger.Departing Mon, 12 Oct, returning Thu, 24 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Mon, 12 Oct, arriving in San Diego International.Inbound indirect flight with Southwest Airlines, departs from San Diego International on Thu, 24 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $407, select.

San Diego.$453 per passenger.Departing Mon, 10 May, returning Sat, 15 May.Return flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Mon, 10 May, arriving in San Diego International.Inbound indirect flight with Alaska Airlines, departs from San Diego International on Sat, 15 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $453, select.

San Diego.$476 per passenger.Departing Mon, 12 Oct, returning Thu, 24 Dec.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Mon, 12 Oct, arriving in San Diego International.Inbound direct flight with Delta departs from San Diego International on Thu, 24 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $476, select.

Find the cheapest month to fly from Seattle to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to San Diego flights are currently cheapest in October.

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Direct flights from Seattle to San Diego

Alternative Seattle to San Diego routes

Looking for the cheapest, fastest or easiest route from Seattle to San Diego? You could fly into the following airports instead.

San Diego International

4km from central San Diego

ClosestCheapest

from $166

Search flights

McClellan-Palomar

48km from central San Diego

from $598

Search flights

Seattle to San Diego: Flight information

The things to know before you go.

Cheapest flight found	$166
Cheapest month to fly	October
Average flight time	2 hrs, 55 mins
Most popular airline	Qatar Airways
Average flights per week	1,400

Finding cheap flights from Seattle to San Diego: Frequently asked questions

How many airports are there in San Diego?

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.

How much are return flights from Seattle to San Diego?

The best price we found for a return flight from Seattle to San Diego is $166. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Seattle to San Diego?

2 hours and 54 minutes is the average flight time from Seattle to San Diego.

Which airlines fly direct from Seattle to San Diego?

Qatar Airways, Alaska Airlines and Southwest Airlines fly direct from Seattle to San Diego.

How many flights are there a week from Seattle to San Diego?

As of September 2026, there are 350 flights per week flying from Seattle to San Diego.

When is the cheapest time to fly from Seattle to San Diego?

The cheapest month to fly from Seattle to San Diego is usually October.

Which is the cheapest airport to fly into in San Diego?

If you're flying from Seattle, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from $166.

Which upcoming date is cheapest to fly from Seattle to San Diego on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to San Diego on Thursday, 1 October 2026.

Can I get a direct flight from Seattle to San Diego?

Yes – the average flight time is 2 hours and 54 minutes.

How can I get the best flight deal from Seattle to San Diego?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to San Diego?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in San Diego?

In September, the average temperature is usually around 21°C. September is typically the warmest month in San Diego, when it usually averages around 24°C. You can expect the least rain in July. The coldest month is March, with temperatures averaging 12°C. The rainiest month is March.

Which is the cheapest airline to fly from Seattle to San Diego with?

The cheapest airline that flies to San Diego is Southwest Airlines .

Flying from Seattle to San Diego: what you need to know

Start planning your holiday by checking out the ideal departure point for your flight from Seattle to San Diego. Explore the options for taking off from Seattle / Tacoma International Airport (SEA) or Paine Field Airport (PAE), two of the city's main airports.
The major arrival points in San Diego are San Diego International Airport (SAN) and McClellan-Palomar Airport (CLD).
Around 2 hours 55 minutes is how long you can expect to be travelling on a direct Seattle to San Diego flight.
Seattle and San Diego are in the same timezone, UTC-8.
Seattle / Tacoma International Airport (SEA) to San Diego International Airport (SAN) is the most traveled route. When booking your flight from Seattle to San Diego, you can pick from 89 services every week between SEA and SAN.
For hassle-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably board your Seattle to San Diego flight.
Flying during a peak time like July? School holidays and other popular seasons can mean longer queues and delays at security. Be extra cautious and get there up to four hours ahead of international flights and two hours before a domestic departure.

How to find the cheapest flights from Seattle to San Diego

Booking ahead of time is often the key to scoring a cheap Seattle to San Diego flight. Prices tend to rise as demand increases, so the closer you get to departure, the more you'll likely spend.
The 'Whole month' tool will show you the cheapest plane tickets from Seattle to San Diego across each month. It's an easy way to snap up a bargain if your travel dates are flexible.
You don't need to check every day to see if prices have dropped when you set up a Price Alert. We'll tell you the moment a better deal comes up on cheap flights from Seattle to San Diego.
Lock in a cheap Seattle to San Diego flight with the help of our filters. Choose your ideal times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

Flying from Seattle

Seattle / Tacoma International Airport (SEA)

You can catch a direct flight from Seattle to San Diego leaving from Seattle / Tacoma International Airport (SEA). Start your trip at SEA and come in for landing at San Diego International Airport (SAN).
You'll have your choice of airlines that offer direct Seattle to San Diego plane tickets out of SEA. Claim your seat with one of these carriers:
The journey from central Seattle to SEA takes about 35 minutes by public transport. If you drive, ride-share or grab a taxi, you'll cover the 19 kilometres in 25 minutes or so, depending on traffic conditions.
After a leisurely start to your trip? Stay near Seattle / Tacoma International Airport. Whether you've booked an early flight from Seattle to San Diego or just don't like being rushed, these hotels are ideal:
80% of flights leaving Seattle / Tacoma International Airport land at their destination on time. With its impressive on-time stats, you're unlikely to experience delays when taking off from SEA.

Arriving in San Diego

San Diego International Airport (SAN)

San Diego International Airport (SAN) is approximately 5 kilometres from central San Diego. If you're catching a taxi or a ride-share, the drive takes roughly 15 minutes.
It usually takes 25 minutes to get there when travelling by public transport.
Reserve a hotel close to SAN if you're coming in on a late flight from Seattle to San Diego. Select one of these options and avoid the hassle of a long transfer:
Grab a San Diego International Airport rental car and discover San Diego and beyond with your own wheels. Thrifty, Dollar and Budget are popular providers you can book with here.
Reserving your vehicle from San Diego International Airport about two weeks in advance can help you secure the lowest rate.
You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

Central San Diego is approximately 48 kilometres from McClellan-Palomar Airport (CLD). As soon as your flight from Seattle to San Diego has hit the runway and you've navigated your way to arrivals, expect a drive of about 35 minutes.
If you hop on public transport, the ride to the centre takes 1 hour 30 minutes or so.
After your flight from Seattle to San Diego, settle in at a hotel near CLD. These are some comfortable options that'll help you switch to relaxation mode:
The quickest way to reach your destination is with a McClellan-Palomar Airport rental car. Pick up a set of wheels from Budget, Hertz or Avis and be off and running.
Usually, the earlier you book, the more you save and the better your options. Reserve your ride from CLD as soon as your plans are confirmed.

Best time to go to San Diego

March is the quietest month for flights from Seattle to San Diego, while August is the most popular. Pick the best time to go to San Diego based on whether you like a laid-back vibe or a lively atmosphere.
When booking your Seattle to San Diego tickets, consider the kind of weather forecast you're hoping for. August is the warmest month in San Diego, with temperatures ranging from 16ºC to 27ºC.
For cooler conditions, search for a cheap flight from Seattle to San Diego in February when temperatures average between 8ºC and 22ºC.

More about San Diego

Start your San Diego trip right by choosing the perfect place to stay. After booking your flight from Seattle to San Diego, check out our selection of accommodation options including:
San Diego Zoo and Balboa Park are a couple of top-rated attractions to put on your San Diego itinerary. Continue your sightseeing adventures at USS Midway Museum.

Explore more of the United States

You've visited San Diego, now it's time to explore more of the United States. Travel around 177 kilometres northwest to Los Angeles to check off its top attractions. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, there's plenty to keep you on the go.
If you're looking to explore another well-known destination in the United States, head for Phoenix, about 483 kilometres east of San Diego. Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum are among the biggest draws.