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Cheap flights from Seattle to San Diego from £68

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
17 Dec — 24 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 November 2025.

Round-trip from

£114

One-way from

£68

Popular in

December

Cheapest in

September

Average price

£229

Good round-trip deal

£248 or less
Southwest
  • Southwest
  • 29/1-1/2
  • 3 total stops
  • 19h 30m total
  • Seattle to San Diego
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United Airlines
  • United Airlines
  • 17/12
  • 1 total stop
  • 5h 23m total
  • Seattle to San Diego
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Highest demand for flights based on searches. 7% potential increase in price (£12 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Diego.
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Find flight deals from Seattle to San Diego

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to San Diego
Explore the most affordable flight options available from Seattle to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 November 2025.

Tue 16/1216:47SEA - SAN
Nonstop2h 46mAlaska Airlines
Tue 16/1220:59SAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 16/11£116
Wed 10/1211:43SEA - SAN
1 stop4h 47mAlaska Airlines
Tue 16/1216:25SAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 16/11£120
Sun 14/1209:50SEA - SAN
Nonstop2h 55mDelta
Tue 16/1215:15SAN - SEA
Nonstop3h 15mDelta
Deal found 14/11£121
Tue 9/1223:15SEA - SAN
1 stop10h 45mAlaska Airlines
Sat 13/1220:59SAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 14/11£123
Tue 9/1207:20SEA - SAN
Nonstop2h 53mAlaska Airlines
Mon 15/1215:24SAN - SEA
1 stop6h 40mAlaska Airlines
Deal found 16/11£127
Mon 8/1221:39SEA - SAN
1 stop11h 00mAlaska Airlines
Fri 12/1206:15SAN - SEA
Nonstop3h 18mAlaska Airlines
Deal found 16/11£130
Tue 16/1214:08SEA - SAN
Nonstop2h 49mAlaska Airlines
Mon 22/1212:40SAN - SEA
1 stop7h 55mAlaska Airlines
Deal found 14/11£135
Tue 16/1219:34SEA - SAN
1 stop4h 41mUnited Airlines
Tue 20/106:15SAN - SEA
1 stop5h 15mUnited Airlines
Deal found 14/11£136
Fri 12/1213:40SEA - SAN
1 stop10h 17mDelta
Sun 14/1206:30SAN - SEA
Nonstop3h 20mDelta
Deal found 16/11£137
Sat 6/1210:15SEA - SAN
2 stops7h 40mSouthwest
Thu 11/1216:50SAN - SEA
1 stop5h 40mSouthwest
Deal found 15/11£139
Sun 7/1209:25SEA - SAN
1 stop5h 37mUnited Airlines
Wed 10/1211:02SAN - SEA
2 stops7h 30mUnited Airlines
Deal found 14/11£140

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 November 2025.
Use the filters below to find and compare flights from Seattle to San Diego that are best for you.

Fly from

Seattle

Fly to

San Diego

Route

Depart

Return

Price

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 13/12

10:38-16:20

1 stop5h 42m

San Diego

Wed 17/12

18:30-21:43

Nonstop3h 13m

£120

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 25/2

12:00-16:51

1 stop4h 51m

San Diego

Wed 4/3

19:26-22:39

Nonstop3h 13m

£120

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 13/12

16:47-19:33

Nonstop2h 46m

San Diego

Tue 16/12

10:26-14:55

1 stop4h 29m

£120

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 14/1

16:33-19:19

Nonstop2h 46m

San Diego

Wed 21/1

14:51-21:58

1 stop7h 07m

£120

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 2/1

07:15-10:11

Nonstop2h 56m

San Diego

Sat 10/1

17:35-20:48

Nonstop3h 13m

£121

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 9/2

07:10-10:02

Nonstop2h 52m

San Diego

Sun 15/2

06:50-10:05

Nonstop3h 15m

£121

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 8/12

15:25-18:13

Nonstop2h 48m

San Diego

Thu 11/12

19:05-22:23

Nonstop3h 18m

£121

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 10/3

09:45-12:37

Nonstop2h 52m

San Diego

Wed 11/3

15:20-18:27

Nonstop3h 07m

£121

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 4/12

07:20-10:13

Nonstop2h 53m

San Diego

Mon 8/12

20:59-00:12

Nonstop3h 13m

£121

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 4/2

15:21-18:00

Nonstop2h 39m

San Diego

Thu 5/2

15:25-18:40

Nonstop3h 15m

£121

Flights are sorted by cheapest return flights first.

Deals found on 14/11

Showing 1-10 of 20 results
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Best time to book a flight from Seattle to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to San Diego

How far ahead should I book a flight from Seattle to San Diego?

Use this chart to determine the optimal time to book a return flight from Seattle to San Diego. Price data was last updated on 14 November 2025.

The best time to book flights from Seattle to San Diego is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to San Diego?

Currently, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of £42). Flying from Seattle to San Diego in July is currently the most expensive (average of £92). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SAN?

Find hourly flight availability from Seattle to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 November 2025.

It’s optimal to fly from Seattle to San Diego at midday. By choosing this option you can save up to 66% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost for a return flight from Seattle to San Diego?

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to San Diego flight route?

    This flight path from Seattle/Tacoma Intl to San Diego was viewed by 5 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to San Diego?

    Departing from Seattle to San Diego will take you 2h 56m. Seattle and San Diego are separated by a distance of 1051 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Seattle to San Diego?

    No one likes to see their flight delayed. When booking a flight from Seattle to San Diego consider choosing Air France (92%), Virgin Atlantic (89%) or WestJet (89%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to San Diego?

    Looking for the cheapest flight from Seattle to San Diego? While on average our users pay £344, our data indicates the cheapest price to be £237. The most popular route (Seattle/Tacoma Intl - San Diego), is priced around £137.

  • Can I find deals for flights from Seattle to San Diego that include hotel bookings?

    Yes. In addition to deals on Seattle to San Diego flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Diego.

  • Can I find deals for business class flights from Seattle to San Diego?

    Yes. Cheapflights offers flight deals from Seattle to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Diego?

    Currently, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of £42). Flying from Seattle to San Diego in July is currently the most expensive (average of £92). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
El Cajon

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Why should you use Cheapflights to find cheap flight tickets from Seattle to San Diego?

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Can Cheapflights find flights from Seattle to San Diego with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to San Diego flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to San Diego become cheaper?

Yes, Cheapflights offers price alerts on Seattle to San Diego flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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