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Cheap flights from Seattle to San Diego from £65

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
18 Mar — 25 Mar1
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 16 February 2026.

Sat 7/314:50
SEA
-
SAN
Nonstop2h 40m
Southwest
Mon 9/317:55
SAN
-
SEA
1 stop5h 55m
Southwest
Deal found 13/2£93
Tue 17/309:00
SEA
-
SAN
2 stops8h 40m
Southwest
Tue 24/310:45
SAN
-
SEA
Nonstop3h 05m
Southwest
Deal found 15/2£97
Sat 7/309:50
SEA
-
SAN
1 stop8h 55m
Southwest
Mon 16/317:10
SAN
-
SEA
1 stop5h 25m
Southwest
Deal found 13/2£104
Tue 14/409:20
SEA
-
SAN
2 stops8h 25m
Southwest
Tue 28/416:30
SAN
-
SEA
2 stops7h 25m
Southwest
Deal found 16/2£108
Sat 7/309:50
SEA
-
SAN
1 stop8h 55m
Southwest
Tue 7/416:30
SAN
-
SEA
2 stops7h 25m
Southwest
Deal found 14/2£108
Tue 10/312:56
SEA
-
SAN
Nonstop2h 50m
Alaska Airlines
Tue 10/319:26
SAN
-
SEA
Nonstop3h 13m
Alaska Airlines
Deal found 14/2£111
Sun 8/307:20
SEA
-
SAN
Nonstop2h 56m
Delta
Fri 13/319:30
SAN
-
SEA
Nonstop3h 15m
Delta
Deal found 13/2£115
Sat 25/411:29
SEA
-
SAN
1 stop4h 47m
Alaska Airlines
Sat 25/419:35
SAN
-
SEA
Nonstop3h 18m
Alaska Airlines
Deal found 13/2£118
Sat 14/314:50
SEA
-
SAN
Nonstop2h 40m
Southwest
Tue 17/317:35
SAN
-
SEA
1 stop6h 45m
Southwest
Deal found 13/2£122
Sat 9/509:00
SEA
-
SAN
2 stops8h 50m
Southwest
Sun 10/513:00
SAN
-
SEA
Nonstop3h 05m
Southwest
Deal found 15/2£126
Thu 16/411:05
SEA
-
SAN
Nonstop2h 45m
Southwest
Sun 19/419:10
SAN
-
SEA
1 stop6h 00m
Southwest
Deal found 15/2£130

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 16 February 2026.

Round-trip from

£93

One-way from

£65

Popular in

December

Cheapest in

January

Average price

£203
Southwest
  • Southwest
  • 7/3-9/3
  • 1 total stop
  • 8h 35m total
  • Seattle to San Diego
Search Deals
United Airlines
  • United Airlines
  • 16/5
  • 1 total stop
  • 5h 12m total
  • Seattle to San Diego
Search Deals
High demand for flights, 2% potential price rise
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 February 2026
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 16 February 2026.
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

Wed 1/4

14:35-17:15

Nonstop2h 40m

San Diego

Wed 8/4

18:30-23:55

1 stop5h 25m

£93

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 17/3

07:30-14:15

1 stop6h 45m

San Diego

Tue 24/3

10:45-13:50

Nonstop3h 05m

£93

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sun 8/3

14:35-17:15

Nonstop2h 40m

San Diego

Wed 11/3

17:30-22:25

1 stop4h 55m

£93

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 31/3

07:30-14:15

1 stop6h 45m

San Diego

Tue 7/4

15:00-18:00

Nonstop3h 00m

£93

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 14/4

07:35-13:55

1 stop6h 20m

San Diego

Tue 28/4

11:30-18:30

1 stop7h 00m

£100

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 24/4

18:15-23:05

1 stop4h 50m

San Diego

Wed 29/4

17:45-22:55

1 stop5h 10m

£100

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 25/3

15:00-21:10

1 stop6h 10m

San Diego

Mon 30/3

18:30-01:40

1 stop7h 10m

£100

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 10/3

07:00-11:35

1 stop4h 35m

San Diego

Tue 10/3

16:40-21:40

1 stop5h 00m

£100

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 29/4

08:42-17:12

2 stops8h 30m

£69

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 11/3

12:00-16:47

1 stop4h 47m

£72

Flights are sorted by cheapest return flights first.

Deals found on 12/2

Showing 1-10 of 19 results
1
2

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 13 February 2026.

The best time to book flights from Seattle to San Diego is 41 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 £40). Flying from Seattle to San Diego in July is currently the most expensive (average of £89). 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 16 February 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.

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 40m. 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 SkyWest Airlines (100%), Air Tahiti Nui (81%) or Alaska Airlines (79%) 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, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of £40). Flying from Seattle to San Diego in July is currently the most expensive (average of £89). 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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