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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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
26 May — 2 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap 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 26 April 2026.

Tue 16/609:45
SEA
-
SAN
Nonstop2h 53m
Delta
Tue 23/613:36
SAN
-
SEA
Nonstop3h 02m
Delta
Deal found 25/4£122
Tue 19/512:10
SEA
-
SAN
Nonstop2h 55m
Southwest
Wed 20/516:30
SAN
-
SEA
1 stop6h 25m
Southwest
Deal found 25/4£129
Sat 23/517:20
SEA
-
SAN
1 stop7h 10m
United Airlines
Wed 27/519:41
SAN
-
SEA
1 stop5h 32m
United Airlines
Deal found 21/4£135
Sat 30/509:55
SEA
-
SAN
1 stop6h 36m
Alaska Airlines
Sat 30/519:30
SAN
-
SEA
Nonstop3h 15m
Alaska Airlines
Deal found 22/4£140
Sat 16/507:26
SEA
-
SAN
Nonstop2h 56m
Alaska Airlines
Wed 20/517:17
SAN
-
SEA
Nonstop3h 11m
Alaska Airlines
Deal found 24/4£141
Wed 26/808:30
SEA
-
SAN
Nonstop2h 55m
Southwest
Tue 1/918:00
SAN
-
SEA
Nonstop3h 00m
Southwest
Deal found 22/4£143
Tue 12/520:15
SEA
-
SAN
1 stop11h 20m
Alaska Airlines
Wed 13/510:11
SAN
-
SEA
Nonstop3h 14m
Alaska Airlines
Deal found 21/4£146
Sat 16/511:15
SEA
-
SAN
Nonstop2h 50m
Southwest
Tue 19/516:30
SAN
-
SEA
1 stop6h 25m
Southwest
Deal found 25/4£148
Wed 13/505:00
SEA
-
SAN
1 stop4h 58m
United Airlines
Sat 16/518:26
SAN
-
SEA
1 stop5h 03m
United Airlines
Deal found 22/4£151

Find 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 26 April 2026.

Round-trip from

£122

One-way from

£68

Popular in

April

Cheapest in

January

Average price

£234

Good round-trip deal

£222 or less
Alaska Airlines
  • Alaska Airlines
  • 20/5-27/5
  • Nonstop
  • 6h 02m total
  • Seattle to San Diego
Search Deals
United Airlines
  • United Airlines
  • 20/5
  • 1 total stop
  • 4h 46m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£6 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Diego.
Search Deals

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 26 April 2026.
Use the filters below to find and compare flights from Seattle to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 29/5

21:09-23:59

Nonstop2h 50m

San Diego

Fri 5/6

18:19-21:30

Nonstop3h 11m

£160

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 27/5

09:55-16:31

1 stop6h 36m

San Diego

Thu 28/5

12:28-15:40

Nonstop3h 12m

£174

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 28/5

15:02-17:53

Nonstop2h 51m

San Diego

Sat 6/6

17:43-22:29

1 stop4h 46m

£185

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 14/5

15:20-18:07

Nonstop2h 47m

San Diego

Mon 18/5

19:10-22:24

Nonstop3h 14m

£190
Fastest return journey

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 5/6

15:20-18:05

Nonstop2h 45m

San Diego

Wed 10/6

07:00-10:05

Nonstop3h 05m

£191

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 31/7

15:15-18:05

Nonstop2h 50m

San Diego

Sun 2/8

07:03-10:05

Nonstop3h 02m

£222

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 3/7

07:26-10:23

Nonstop2h 57m

San Diego

Wed 8/7

17:35-20:35

Nonstop3h 00m

£222

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 5/10

17:59-20:56

Nonstop2h 57m

San Diego

Sun 11/10

20:35-23:37

Nonstop3h 02m

£222

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 29/6

15:33-22:49

1 stop7h 16m

San Diego

Wed 8/7

18:27-23:10

1 stop4h 43m

£224

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 6/8

17:50-20:45

Nonstop2h 55m

San Diego

Mon 10/8

16:50-22:55

1 stop6h 05m

£227

Flights are sorted by cheapest return flights first.

Deals found on 24/4

Showing 1-10 of 24 resultsSorted by cheapest first
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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?

The best time to book flights from Seattle to San Diego is 50 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, January is the cheapest month in which you can book a flight from Seattle to San Diego (average of £142). Flying from Seattle to San Diego in April is currently the most expensive (average of £234). 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 26 April 2026.

It’s optimal to fly from Seattle to San Diego at midday. By choosing this option you can save up to 67% on the cost of your flight, compared to a flight in the morning.

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 1 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 47m. Seattle and San Diego are separated by a distance of 1051 mi. Most flights are nonstop.

  • 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 Japan Airlines (88%), Air Tahiti Nui (86%) or Hawaiian Airlines (82%) 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 £222, our data indicates the cheapest price to be £222. The most popular route (Seattle/Tacoma Intl - San Diego), is priced around £236.

  • 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, January is the cheapest month in which you can book a flight from Seattle to San Diego (average of £142). Flying from Seattle to San Diego in April is currently the most expensive (average of £234). 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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