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Cheap flights from San Diego to Seattle from £67

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 31/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
27 Jan — 3 Feb1
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 84 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap 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 28 December 2025.

Sat 27/1219:10SAN - SEA
Nonstop3h 15mDelta
Wed 21/115:21SEA - SAN
Nonstop2h 39mDelta
Deal found 26/12£320
Sun 28/1221:24SAN - SEA
Nonstop3h 17mAlaska Airlines
Sat 31/114:36SEA - SAN
Nonstop2h 44mAlaska Airlines
Deal found 27/12£324
Sat 27/1219:10SAN - SEA
Nonstop3h 15mDelta
Fri 30/119:55SEA - SAN
Nonstop2h 47mDelta
Deal found 26/12£328
Sat 27/1217:30SAN - SEA
1 stop5h 30mSouthwest
Wed 21/106:05SEA - SAN
2 stops10h 40mSouthwest
Deal found 26/12£341
Sun 28/1218:59SAN - SEA
Nonstop3h 13mAlaska Airlines
Sun 1/220:21SEA - SAN
Nonstop2h 48mAlaska Airlines
Deal found 28/12£354
Sun 28/1216:10SAN - SEA
1 stop7h 02mUnited Airlines
Sat 31/108:40SEA - SAN
1 stop8h 48mUnited Airlines
Deal found 27/12£355
Sat 27/1219:10SAN - SEA
Nonstop3h 15mDelta
Sat 10/114:00SEA - SAN
Nonstop2h 40mDelta
Deal found 26/12£409
Mon 29/1215:25SAN - SEA
Nonstop3h 15mDelta
Mon 12/110:00SEA - SAN
Nonstop2h 48mDelta
Deal found 26/12£428
Fri 26/1206:40SAN - SEA
1 stop4h 55mSouthwest
Sat 10/109:25SEA - SAN
2 stops7h 40mSouthwest
Deal found 25/12£451
Sat 27/1221:24SAN - SEA
Nonstop3h 17mAlaska Airlines
Sat 10/116:33SEA - SAN
Nonstop2h 46mAlaska Airlines
Deal found 27/12£479
Fri 26/1219:10SAN - SEA
Nonstop3h 15mDelta
Fri 2/109:55SEA - SAN
Nonstop2h 55mDelta
Deal found 26/12£483

Find 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 28 December 2025.

Round-trip from

£88

One-way from

£67

Popular in

December

Cheapest in

January

Average price

£250

Good one-way deal

£169 or less
Delta
  • Delta
  • 17/1-21/1
  • Nonstop
  • 6h 05m total
  • San Diego to Seattle
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United Airlines
  • United Airlines
  • 11/3
  • 1 total stop
  • 7h 04m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£7 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
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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 28 December 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

Sat 17/1

07:00-10:15

Nonstop3h 15m

Seattle/Tacoma Intl

Tue 20/1

15:21-18:00

Nonstop2h 39m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/3

07:20-10:36

Nonstop3h 16m

Seattle/Tacoma Intl

Fri 13/3

07:20-10:16

Nonstop2h 56m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 28/1

11:00-14:17

Nonstop3h 17m

Seattle/Tacoma Intl

Wed 4/2

19:55-22:42

Nonstop2h 47m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 26/1

13:45-17:00

Nonstop3h 15m

Seattle/Tacoma Intl

Mon 2/2

07:10-10:02

Nonstop2h 52m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/2

18:55-22:10

Nonstop3h 15m

Seattle/Tacoma Intl

Sun 8/2

11:40-14:29

Nonstop2h 49m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 26/3

13:45-16:53

Nonstop3h 08m

Seattle/Tacoma Intl

Mon 30/3

19:35-22:28

Nonstop2h 53m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 16/1

11:00-14:15

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 21/1

19:55-22:42

Nonstop2h 47m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 13/2

15:25-18:40

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 18/2

19:35-22:20

Nonstop2h 45m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 13/2

07:20-10:36

Nonstop3h 16m

Seattle/Tacoma Intl

Sun 8/3

19:35-22:27

Nonstop2h 52m

£88

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 27/2

07:20-10:36

Nonstop3h 16m

Seattle/Tacoma Intl

Sun 1/3

07:15-10:04

Nonstop2h 49m

£88

Flights are sorted by cheapest return flights first.

Deals found on 26/12

Showing 1-10 of 22 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 26 December 2025.

Booking 84 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 £99). 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 28 December 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, 5 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 £88, Delta can have you in Seattle from San Diego in 3h 15m. The distance between San Diego and Seattle is about 1051 mi. All flights are typically direct.

  • 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 Air France (95%), Virgin Atlantic (89%) and American Airlines (87%).

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

    While on average a flight from San Diego to Seattle is generally £169, our data shows the cheapest flight currently is £139. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay £523 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 £99). 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
SeaTac

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Alternative routes for San Diego to Seattle

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Fly with Cheapflights

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How does Cheapflights help users find flights from San Diego to Seattle?

Cheapflights makes it easy to find San Diego to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from San Diego to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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