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Cheap flights from San Diego to Seattle 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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or February, booked 69 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from San Diego to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Seattle (SEA). 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 14 November 2025.

Round-trip from

£109

One-way from

£68

Popular in

July

Cheapest in

January

Average price

£221

Good one-way deal

£173 or less
Southwest
  • Southwest
  • 11/12-13/12
  • 3 total stops
  • 14h 00m total
  • San Diego to Seattle
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United Airlines
  • United Airlines
  • 14/12
  • 1 total stop
  • 8h 56m total
  • San Diego to Seattle
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Highest demand for flights based on searches. 8% potential increase in price (£14 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£3 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 one-way flight from San Diego to Seattle/Tacoma Intl.
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Find flight deals from San Diego to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Seattle
Explore the most affordable flight options available from San Diego to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 November 2025.

Thu 11/1208:05SAN - SEA
1 stop6h 20mSouthwest
Sat 13/1210:15SEA - SAN
2 stops7h 40mSouthwest
Deal found 12/11£109
Tue 16/1209:34SAN - SEA
Nonstop3h 18mAlaska Airlines
Tue 16/1216:00SEA - SAN
1 stop5h 19mAlaska Airlines
Deal found 13/11£115
Mon 15/1206:15SAN - SEA
Nonstop3h 18mAlaska Airlines
Mon 15/1212:08SEA - SAN
Nonstop2h 58mAlaska Airlines
Deal found 13/11£116
Sat 13/1220:59SAN - SEA
Nonstop3h 13mAlaska Airlines
Wed 17/1209:29SEA - SAN
1 stop7h 01mAlaska Airlines
Deal found 13/11£120
Sun 14/1211:05SAN - SEA
Nonstop3h 17mDelta
Sun 14/1219:55SEA - SAN
Nonstop2h 50mDelta
Deal found 12/11£121
Sat 6/1208:10SAN - SEA
1 stop6h 02mAlaska Airlines
Sat 6/1218:06SEA - SAN
Nonstop2h 51mAlaska Airlines
Deal found 12/11£122
Mon 15/1220:58SAN - SEA
1 stop10h 17mAlaska Airlines
Tue 16/1209:56SEA - SAN
Nonstop2h 51mAlaska Airlines
Deal found 13/11£127
Thu 25/1218:59SAN - SEA
Nonstop3h 13mAlaska Airlines
Wed 31/1219:55SEA - SAN
Nonstop2h 50mAlaska Airlines
Deal found 11/11£128
Tue 9/1209:10SAN - SEA
1 stop5h 28mAlaska Airlines
Thu 11/1219:59SEA - SAN
Nonstop2h 48mAlaska Airlines
Deal found 13/11£130
Mon 8/1208:10SAN - SEA
1 stop6h 02mAlaska Airlines
Mon 8/1216:47SEA - SAN
Nonstop2h 46mAlaska Airlines
Deal found 12/11£134
Wed 3/1207:45SAN - SEA
1 stop7h 44mUnited Airlines
Wed 3/1219:34SEA - SAN
1 stop4h 41mUnited Airlines
Deal found 12/11£135
Thu 25/1214:13SAN - SEA
1 stop6h 22mAlaska Airlines
Tue 6/113:43SEA - SAN
Nonstop2h 48mAlaska Airlines
Deal found 12/11£135

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Diego to Seattle 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 14 November 2025.
Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Fly from

San Diego

Fly to

Seattle

Route

Depart

Return

Price

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 8/1

14:20-21:50

2 stops7h 30m

Seattle/Tacoma Intl

Tue 13/1

06:05-16:45

2 stops10h 40m

£113

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 2/2

14:15-20:20

1 stop6h 05m

Seattle/Tacoma Intl

Wed 4/2

05:15-18:35

2 stops13h 20m

£114

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 13/12

10:26-14:55

1 stop4h 29m

Seattle/Tacoma Intl

Mon 15/12

14:08-16:57

Nonstop2h 49m

£120

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 13/12

10:26-14:55

1 stop4h 29m

Seattle/Tacoma Intl

Tue 16/12

07:20-10:13

Nonstop2h 53m

£120

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 4/12

14:15-17:27

Nonstop3h 12m

Seattle/Tacoma Intl

Sat 6/12

11:43-16:30

1 stop4h 47m

£120

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 24/1

16:01-19:11

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 27/1

11:20-15:21

1 stop4h 01m

£120

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 3/3

11:00-14:15

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 4/3

15:15-17:52

Nonstop2h 37m

£121

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 16/12

06:30-09:50

Nonstop3h 20m

Seattle/Tacoma Intl

Fri 2/1

07:15-10:11

Nonstop2h 56m

£121

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 13/12

06:30-09:50

Nonstop3h 20m

Seattle/Tacoma Intl

Thu 18/12

09:50-12:45

Nonstop2h 55m

£121

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 20/2

10:15-15:20

1 stop5h 05m

Seattle/Tacoma Intl

Mon 23/2

18:59-21:49

Nonstop2h 50m

£128

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Showing 1-10 of 21 results
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Best time to book a flight from San Diego to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from San Diego 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 San Diego to Seattle

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

Use this chart to determine the optimal time to book a return flight from San Diego to Seattle. Price data was last updated on 7 November 2025.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Diego to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of £41). Flying from San Diego to Seattle in July is currently the most expensive (average of £102). 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 SAN to SEA?

Find hourly flight availability from San Diego to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 November 2025.

One of the essential ways to save on airfare from San Diego to Seattle is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the afternoon could potentially save you up to 66% on airfare.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Seattle. 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 San Diego to Seattle flight route?

    Within the past month, 4 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

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

    For as low as £120, Southwest can have you in Seattle from San Diego in 4h 29m. The distance between San Diego and Seattle is about 1051 mi. This flight may include one or multiple stops.

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

    The top 3 most reliable airlines when flying from San Diego to Seattle are Virgin Atlantic (96%), Air France (94%) and Delta (90%).

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

    While on average a flight from San Diego to Seattle is generally £173, our data shows the cheapest flight currently is £143. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay £396 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego to Seattle 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 San Diego to Seattle?

    Currently, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of £41). Flying from San Diego to Seattle in July is currently the most expensive (average of £102). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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

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

Yes, we can. To see specific flights from San Diego to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from San Diego to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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