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Cheap flights from Seattle to San Diego from £73

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 25/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
1 Nov — 8 Nov1
1 adult
1 adult, Economy

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 2 October 2025.

Round-trip from

£131

One-way from

£73

Popular in

December

Cheapest in

January

Average price

£180
Alaska Airlines
  • Alaska Airlines
  • 22/10-25/10
  • Nonstop
  • 6h 11m total
  • Seattle to San Diego
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Southwest
  • Southwest
  • 25/12
  • 1 total stop
  • 4h 20m total
  • Seattle to San Diego
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Highest demand for flights based on searches. 2% potential increase in price (£4 potential increase over avg. return price).
Search Deals
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 October 2025
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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 2 October 2025.

Wed 22/1009:45SEA - SAN
Nonstop2h 53mDelta
Sat 25/1013:40SAN - SEA
Nonstop3h 10mDelta
Deal found 1/10£131
Wed 19/1105:15SEA - SAN
2 stops6h 35mSouthwest
Wed 3/1216:10SAN - SEA
1 stop4h 30mSouthwest
Deal found 1/10£132
Thu 4/1206:15SEA - SAN
1 stop4h 45mSouthwest
Sun 7/1209:00SAN - SEA
1 stop5h 30mSouthwest
Deal found 1/10£133
Thu 13/1109:10SEA - SAN
1 stop6h 35mSouthwest
Wed 19/1116:10SAN - SEA
1 stop4h 30mSouthwest
Deal found 1/10£135
Tue 4/1111:30SEA - SAN
1 stop5h 00mAlaska Airlines
Wed 5/1108:01SAN - SEA
1 stop9h 02mAlaska Airlines
Deal found 1/10£136
Wed 5/1108:42SEA - SAN
1 stop5h 25mAlaska Airlines
Wed 5/1117:05SAN - SEA
1 stop5h 00mAlaska Airlines
Deal found 1/10£137
Wed 19/1118:05SEA - SAN
Nonstop2h 51mAlaska Airlines
Sun 23/1106:15SAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 30/9£139
Fri 31/1018:05SEA - SAN
Nonstop2h 51mAlaska Airlines
Mon 10/1117:25SAN - SEA
Nonstop3h 09mAlaska Airlines
Deal found 1/10£140
Sat 15/1110:15SEA - SAN
2 stops7h 35mSouthwest
Mon 17/1110:30SAN - SEA
2 stops8h 10mSouthwest
Deal found 1/10£140
Sat 1/1113:30SEA - SAN
1 stop7h 29mAlaska Airlines
Wed 5/1108:01SAN - SEA
1 stop9h 02mAlaska Airlines
Deal found 1/10£141
Mon 3/1116:21SEA - SAN
Nonstop2h 51mAlaska Airlines
Wed 12/1112:36SAN - SEA
1 stop6h 31mAlaska Airlines
Deal found 1/10£142

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 October 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

Fri 5/12

08:10-13:50

1 stop5h 40m

San Diego

Sun 7/12

07:00-14:30

1 stop7h 30m

£133

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 23/2

07:55-12:50

1 stop4h 55m

San Diego

Fri 27/2

14:15-18:50

1 stop4h 35m

£133

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/1

17:10-00:15

1 stop7h 05m

San Diego

Tue 13/1

11:08-21:12

2 stops10h 04m

£137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 11/11

19:55-22:47

Nonstop2h 52m

San Diego

Mon 17/11

06:15-09:35

Nonstop3h 20m

£139

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 19/11

11:30-16:30

1 stop5h 00m

San Diego

Wed 3/12

08:05-14:50

1 stop6h 45m

£141

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 20/10

19:45-22:31

Nonstop2h 46m

San Diego

Fri 31/10

13:40-16:50

Nonstop3h 10m

£146

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/1

12:41-15:29

Nonstop2h 48m

San Diego

Tue 13/1

10:22-14:49

1 stop4h 27m

£147

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 6/11

11:30-14:20

Nonstop2h 50m

San Diego

Mon 10/11

06:15-09:35

Nonstop3h 20m

£147

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 5/12

21:59-16:30

1 stop18h 31m

San Diego

Sun 7/12

06:15-09:33

Nonstop3h 18m

£149

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 8/11

10:15-17:50

2 stops7h 35m

San Diego

Sat 15/11

09:40-16:50

1 stop7h 10m

£151

Flights are sorted by cheapest return flights first.

Deals found on 30/9

Showing 1-10 of 24 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 26 September 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, January is the cheapest month in which you can book a flight from Seattle to San Diego (average of £585). Flying from Seattle to San Diego in July is currently the most expensive (average of £920). 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 October 2025.

It’s optimal to fly from Seattle to San Diego in the morning. By choosing this option you can save up to 2% on the cost of your flight, compared to a flight at midday.

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 52m. 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 cheapest airlines to fly from Seattle to San Diego one-way?

    One-way options have recently been found by users for as low as £73 on Southwest. Other airlines that offer cheap prices include Delta from £74 and Alaska Airlines from £74 one-way.

  • 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 China Airlines (100%), Aeromexico (100%) or LATAM Airlines (100%) 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 £585). Flying from Seattle to San Diego in July is currently the most expensive (average of £920). 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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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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