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Cheap flights from Seattle to San Diego from £82

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
1 Aug — 8 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in January or September, booked 51 days in advance, depart on a Monday or Tuesday and return on a Tuesday

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 2 July 2026.

Sat 22/809:20
SEA
-
SAN
Nonstop2h 45m
Southwest
Tue 25/816:10
SAN
-
SEA
2 stops5h 35m
Southwest
Deal found 29/6£137
Fri 23/1008:05
SEA
-
SAN
Nonstop2h 45m
Southwest
Wed 18/1117:00
SAN
-
SEA
1 stop4h 25m
Southwest
Deal found 29/6£138
Thu 20/820:49
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Sun 23/806:15
SAN
-
SEA
Nonstop3h 05m
Alaska Airlines
Deal found 28/6£140
Wed 12/820:25
SEA
-
SAN
Nonstop3h 01m
Alaska Airlines
Sat 22/820:45
SAN
-
SEA
Nonstop3h 07m
Alaska Airlines
Deal found 29/6£140
Sat 22/805:30
SEA
-
SAN
1 stop5h 10m
Southwest
Sat 29/816:40
SAN
-
SEA
Nonstop2h 55m
Southwest
Deal found 2/7£141
Fri 21/817:20
SEA
-
SAN
1 stop5h 27m
United Airlines
Wed 26/811:20
SAN
-
SEA
1 stop4h 54m
United Airlines
Deal found 29/6£142
Wed 12/807:11
SEA
-
SAN
1 stop5h 02m
United Airlines
Tue 18/811:20
SAN
-
SEA
1 stop4h 54m
United Airlines
Deal found 2/7£143
Thu 27/812:22
SEA
-
SAN
1 stop5h 04m
United Airlines
Tue 1/914:24
SAN
-
SEA
2 stops6h 19m
United Airlines
Deal found 1/7£146
Fri 21/820:49
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Sun 23/806:15
SAN
-
SEA
Nonstop3h 05m
Alaska Airlines
Deal found 27/6£148
Fri 21/809:10
SEA
-
SAN
Nonstop2h 45m
Southwest
Tue 25/810:00
SAN
-
SEA
1 stop5h 00m
Southwest
Deal found 2/7£149
Sat 7/1110:55
SEA
-
SAN
2 stops7h 25m
Southwest
Wed 11/1117:00
SAN
-
SEA
1 stop4h 25m
Southwest
Deal found 1/7£149

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 2 July 2026.

Round-trip from

£137

One-way from

£82

Popular in

June

Cheapest in

January

Average price

£238
Southwest
  • Southwest
  • 2/9-9/9
  • 2 total stops
  • 8h 25m total
  • Seattle to San Diego
Search Deals
Southwest
  • Southwest
  • 13/9
  • 1 total stop
  • 4h 25m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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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 2 July 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

Thu 22/10

07:15-10:07

Nonstop2h 52m

San Diego

Wed 28/10

13:50-17:00

Nonstop3h 10m

£141

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 3/9

15:15-18:05

Nonstop2h 50m

San Diego

Sun 6/9

07:03-10:05

Nonstop3h 02m

£149
Fastest return journey

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 15/8

09:20-12:05

Nonstop2h 45m

San Diego

Mon 17/8

08:30-11:30

Nonstop3h 00m

£152

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 17/9

09:10-11:55

Nonstop2h 45m

San Diego

Mon 21/9

16:50-22:55

1 stop6h 05m

£153

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 27/10

08:05-15:19

1 stop7h 14m

San Diego

Sat 31/10

14:59-18:05

Nonstop3h 06m

£158

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 22/10

19:04-21:58

Nonstop2h 54m

San Diego

Wed 28/10

11:06-16:24

1 stop5h 18m

£158

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 28/10

20:04-22:58

Nonstop2h 54m

San Diego

Sat 31/10

15:55-21:21

1 stop5h 26m

£162

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 24/9

09:20-15:00

1 stop5h 40m

San Diego

Sun 27/9

08:45-11:45

Nonstop3h 00m

£164

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 23/10

06:35-12:55

1 stop6h 20m

San Diego

Wed 18/11

09:20-17:45

2 stops8h 25m

£175

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 28/8

17:50-20:45

Nonstop2h 55m

San Diego

Sun 30/8

19:50-00:50

1 stop5h 00m

£176

Flights are sorted by cheapest return flights first.

Deals found on 28/6

Showing 1-10 of 22 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 £145). Flying from Seattle to San Diego in June is currently the most expensive (average of £247). 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 2 July 2026.

It’s optimal to fly from Seattle to San Diego in the afternoon. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight at midday.

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 2 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 45m. 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 KLM (92%), WestJet (92%) or Delta (88%) as they are the most reliable in getting you off to your destination on time.

  • 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 £145). Flying from Seattle to San Diego in June is currently the most expensive (average of £247). 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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