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Cheap flights from San Diego to Seattle from £66

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
18 Jun — 25 Jun1
1 adult

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 63 days in advance, depart on a Wednesday or Thursday 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 13 June 2025.

Round-trip from

£130

One-way from

£66

Popular in

July

Cheapest in

January

Average price

£201
Delta
  • Delta
  • 13/8-19/8
  • Nonstop
  • 5h 56m total
  • San Diego to Seattle
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 12/8
  • Nonstop
  • 2h 58m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£20 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
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Find flight deals from San Diego to Seattle

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 13 June 2025.

Wed 13/819:19SAN - SEA
Nonstop3h 02mDelta
Tue 19/815:30SEA - SAN
Nonstop2h 54mDelta
Deal found 13/6£130
Sat 23/813:15SAN - SEA
1 stop5h 41mAlaska Airlines
Wed 27/816:12SEA - SAN
Nonstop2h 51mAlaska Airlines
Deal found 10/6£138
Tue 19/811:05SAN - SEA
1 stop5h 45mSouthwest
Tue 26/808:00SEA - SAN
1 stop4h 20mSouthwest
Deal found 12/6£141
Sat 26/708:00SAN - SEA
1 stop6h 48mHawaiian Airlines
Sat 2/807:00SEA - SAN
Nonstop2h 50mHawaiian Airlines
Deal found 11/6£194
Sat 18/1011:08SAN - SEA
2 stops10h 07mUnited Airlines
Tue 21/1017:31SEA - SAN
1 stop6h 44mUnited Airlines
Deal found 10/6£208
Sat 5/708:10SAN - SEA
1 stop4h 48mMultiple Airlines
Mon 7/719:59SEA - SAN
Nonstop2h 56mMultiple Airlines
Deal found 12/6£288

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 13 June 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

Wed 13/8

19:19-22:21

Nonstop3h 02m

Seattle/Tacoma Intl

Tue 19/8

15:30-18:24

Nonstop2h 54m

£130

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 23/8

13:15-18:56

1 stop5h 41m

Seattle/Tacoma Intl

Wed 27/8

16:12-19:03

Nonstop2h 51m

£138

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 19/8

11:05-16:50

1 stop5h 45m

Seattle/Tacoma Intl

Tue 26/8

08:00-12:20

1 stop4h 20m

£141

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 25/7

20:45-23:44

Nonstop2h 59m

Seattle/Tacoma Intl

Mon 28/7

21:03-23:59

Nonstop2h 56m

£189

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 18/10

11:08-21:15

2 stops10h 07m

Seattle/Tacoma Intl

Tue 21/10

17:31-00:15

1 stop6h 44m

£208

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 5/7

08:10-12:58

1 stop4h 48m

Seattle/Tacoma Intl

Mon 7/7

19:59-22:55

Nonstop2h 56m

£288

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 12/8

12:12-15:10

Nonstop2h 58m

£66

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 12/8

15:35-18:28

Nonstop2h 53m

£80

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 6/8

06:15-11:26

1 stop5h 11m

£82

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 3/7

19:27-00:59

1 stop5h 32m

£91

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 12 results
1
2

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 9 June 2025.

Booking 63 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of £622). Flying from San Diego to Seattle in July is currently the most expensive (average of £946). 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 13 June 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 in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 63% on airfare.

Weekly flight availability from San Diego to Seattle

Explore weekly flight availability from San Diego to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 June 2025.

The most flights from SAN to SEA are scheduled on a Thursday (62 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (25 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 13 June 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from San Diego to Seattle. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very Good
4,286 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very Good
7,946 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,496 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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, 6 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

  • What are the cheapest airlines flying from San Diego to Seattle round-trip?

    Our cheapest airline available from San Diego to Seattle is Delta. Our recent data shows that you can find tickets from as low as £130 on this airline. Additional options worth looking into are Alaska Airlines and Southwest, starting at £138 and £141 round-trip. You may be able to fly from San Diego to Seattle for 24% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from San Diego to Seattle one-way?

    £66 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and Hawaiian Airlines, with prices starting from £80 and £82, respectively.

  • 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 Sun Country Air (100%), Scandinavian Airlines (100%) and KLM (93%).

  • 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of £622). Flying from San Diego to Seattle in July is currently the most expensive (average of £946). 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
Tacoma
Leavenworth
Bothell

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Alternative routes for San Diego to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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