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Cheap flights from San Diego to Seattle from £69

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
27 Mar — 3 Apr1
1 adult

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 34 days in advance, depart on a Wednesday or Monday 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 22 March 2025.

Round-trip from

£124

One-way from

£69

Popular in

July

Cheapest in

January

Average price

£227
Hawaiian Airlines
  • Hawaiian Airlines
  • 5/5-12/5
  • 1 total stop
  • 29h 50m total
  • San Diego to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 20/5
  • Nonstop
  • 3h 09m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£24 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).
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Average for round-trip flights in March 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 22 March 2025.

Mon 5/508:29SAN - SEA
1 stop27h 06mMultiple Airlines
Mon 12/521:15SEA - SAN
Nonstop2h 44mMultiple Airlines
Deal found 21/3£124
Tue 22/407:20SAN - SEA
Nonstop3h 12mDelta
Tue 6/511:40SEA - SAN
Nonstop2h 53mDelta
Deal found 22/3£137
Wed 16/407:00SAN - SEA
Nonstop3h 12mHawaiian Airlines
Fri 18/421:15SEA - SAN
Nonstop2h 44mHawaiian Airlines
Deal found 21/3£145
Tue 29/419:45SAN - SEA
1 stop12h 20mAlaska Airlines
Fri 2/506:00SEA - SAN
Nonstop2h 46mAlaska Airlines
Deal found 21/3£147
Wed 7/514:30SAN - SEA
2 stops7h 01mUnited Airlines
Tue 13/512:45SEA - SAN
1 stop7h 39mUnited Airlines
Deal found 21/3£156
Tue 1/718:10SAN - SEA
1 stop6h 20mSouthwest
Thu 10/705:15SEA - SAN
1 stop4h 35mSouthwest
Deal found 21/3£196
Wed 26/1118:01SAN - SEA
1 stop15h 20mSun Country Air
Sun 30/1123:59SEA - SAN
1 stop16h 50mSun Country Air
Deal found 21/3£402

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 22 March 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

Mon 5/5

08:29-11:35

1 stop27h 06m

Seattle/Tacoma Intl

Mon 12/5

21:15-23:59

Nonstop2h 44m

£124

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 22/4

07:20-10:32

Nonstop3h 12m

Seattle/Tacoma Intl

Tue 6/5

11:40-14:33

Nonstop2h 53m

£137

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 16/4

07:00-10:12

Nonstop3h 12m

Seattle/Tacoma Intl

Fri 18/4

21:15-23:59

Nonstop2h 44m

£145

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 29/4

19:45-08:05

1 stop12h 20m

Seattle/Tacoma Intl

Fri 2/5

06:00-08:46

Nonstop2h 46m

£147

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 7/5

14:30-21:31

2 stops7h 01m

Seattle/Tacoma Intl

Tue 13/5

12:45-20:24

1 stop7h 39m

£156

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 1/7

18:10-00:30

1 stop6h 20m

Seattle/Tacoma Intl

Thu 10/7

05:15-09:50

1 stop4h 35m

£196

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 20/5

10:28-13:37

Nonstop3h 09m

£69

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 24/4

07:20-10:32

Nonstop3h 12m

£77

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 16/4

10:16-18:37

2 stops8h 21m

£80

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 20/4

19:00-01:15

1 stop6h 15m

£84

Flights are sorted by cheapest return flights first.

Deals found on 21/3

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 21 March 2025.

Booking 34 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 22 March 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 92% 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 22 March 2025.

The most flights from SAN to SEA are scheduled on a Friday (53 on average). You will have fewer flight options on Thursday, 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 22 March 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from San Diego to Seattle. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very Good
4,277 reviews
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very Good
9,759 reviews
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very Good
7,892 reviews
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,325 reviews
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,605 reviews
Southwest
8.1
Very Good
4,277 reviews
Check prices

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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, 7 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 £137 on this airline. Additional options worth looking into are Hawaiian Airlines and Alaska Airlines, starting at £145 and £147 round-trip. You may be able to fly from San Diego to Seattle for 25% less than the average price by searching for these airlines.

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

    £69 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 United Airlines, with prices starting from £77 and £80, 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 SkyWest Airlines (100%), Aeromexico (100%) and ITA Airways (100%).

  • 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

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

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