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Cheap flights from San Diego to Seattle from £63

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
23 Feb — 2 Mar1
1 adult

The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 55 days in advance, depart on a Thursday 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 18 February 2025.

Round-trip from

£125

One-way from

£63

Popular in

July

Cheapest in

January

Average price

£203

Good round-trip deal

£275 or less
Alaska Airlines
  • Alaska Airlines
  • 19/3-25/3
  • Nonstop
  • 5h 56m total
  • San Diego to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 25/3
  • Nonstop
  • 3h 09m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
Search Deals

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 18 February 2025.

Wed 19/311:35SAN - SEA
Nonstop3h 10mHawaiian Airlines
Tue 25/309:55SEA - SAN
Nonstop2h 52mHawaiian Airlines
Deal found 18/2£125
Wed 19/308:00SAN - SEA
1 stop5h 58mAlaska Airlines
Wed 26/313:47SEA - SAN
Nonstop2h 47mAlaska Airlines
Deal found 18/2£132
Mon 12/513:35SAN - SEA
Nonstop3h 05mDelta
Sun 18/507:20SEA - SAN
Nonstop2h 50mDelta
Deal found 18/2£148
Fri 14/318:04SAN - SEA
1 stop6h 51mUnited Airlines
Sun 16/305:00SEA - SAN
1 stop5h 04mUnited Airlines
Deal found 17/2£168
Tue 18/310:00SAN - SEA
1 stop4h 40mSouthwest
Fri 21/307:00SEA - SAN
1 stop4h 25mSouthwest
Deal found 18/2£242

Find flights from San Diego to Seattle within your budget

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 18 February 2025.

Fly from

San Diego

Fly to

Seattle

Route

Depart

Return

Price

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 19/3

19:20-22:29

Nonstop3h 09m

Seattle/Tacoma Intl

Tue 25/3

15:57-18:44

Nonstop2h 47m

£125

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 12/5

18:55-22:05

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 20/5

09:45-12:37

Nonstop2h 52m

£148

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 19/5

06:15-09:24

Nonstop3h 09m

Seattle/Tacoma Intl

Mon 19/5

16:16-19:01

Nonstop2h 45m

£152

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 14/3

18:04-00:55

1 stop6h 51m

Seattle/Tacoma Intl

Sun 16/3

05:00-10:04

1 stop5h 04m

£168

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 18/3

10:00-14:40

1 stop4h 40m

Seattle/Tacoma Intl

Fri 21/3

07:00-11:25

1 stop4h 25m

£242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 25/3

19:20-22:29

Nonstop3h 09m

£63

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 18/3

18:58-22:10

Nonstop3h 12m

£70

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 15/3

18:04-00:55

1 stop6h 51m

£83

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 26/5

06:15-09:24

Nonstop3h 09m

£134

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 18/5

07:25-14:00

1 stop6h 35m

£154

Flights are sorted by cheapest return flights first.

Deals found on 18/2

Showing 1-10 of 11 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.

Travel insights for flights from San Diego to Seattle

Get recent, data-driven insights about flights from San Diego to Seattle including ideal travel times, pricing trends, and more.

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 14 February 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 18 February 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 18 February 2025.

The most flights from SAN to SEA are scheduled on a Monday (48 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (21 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 18 February 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
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Southwest
8.1
Very Good
4,423 reviews
Southwest
8.1
Very Good
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Alaska Airlines
8.0
Very Good
9,687 reviews
Southwest
8.1
Very Good
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Delta
8.0
Very Good
8,246 reviews
Southwest
8.1
Very Good
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Hawaiian Airlines
7.9
Good
2,319 reviews
Southwest
8.1
Very Good
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

United Airlines
7.4
Good
8,779 reviews
Southwest
8.1
Very Good
4,423 reviews
Check prices

Boarding

8.2

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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, 8 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 Alaska Airlines. Our recent data shows that you can find tickets from as low as £125 on this airline. Additional options worth looking into are Delta and Hawaiian Airlines, starting at £148 and £152 round-trip. You may be able to fly from San Diego to Seattle for 33% less than the average price by searching for these airlines.

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

    £63 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 £70 and £83, 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%).

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

    While on average a flight from San Diego to Seattle is generally £275, our data shows the cheapest flight currently is £275. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay £83 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, 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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