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$109+ Cheap flights from San Diego to Seattle (SAN - SEA)

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 Thursday or Friday and return on a Tuesday

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 July 3, 2025.

Round-trip from

$193
(CheapOair)

One-way from

$109
(Delta)

Popular in

July

Cheapest in

January

Average price

$292

Good round-trip deal

$259 or less

Good one-way deal

$159 or less
From San Diego to Seattle/Tacoma Intl
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One-way flight from San Diego to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 13% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
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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

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 July 3, 2025.

This CheapOair deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2010:11 amSAN - SEA
1 stop23h 34mFrontier
Sun 9/218:17 pmSEA - SAN
1 stop18h 45mFrontier
Deal found 7/1$193
This FlightHub deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/319:40 pmSAN - SEA
1 stop18h 45mSpirit Airlines
Sun 8/105:30 pmSEA - SAN
1 stop16h 25mSpirit Airlines
Deal found 7/1$194
This FlightHub deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/97:04 pmSAN - SEA
1 stop19h 02mMultiple Airlines
Tue 7/155:30 pmSEA - SAN
1 stop5h 36mMultiple Airlines
Deal found 7/1$196
This Delta deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2111:10 amSAN - SEA
Nonstop3h 06mDelta
Sun 8/247:10 amSEA - SAN
Nonstop2h 54mDelta
Deal found 7/3$197
This Cheapflightsfares deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/213:06 pmSAN - SEA
1 stop5h 29mHawaiian Airlines
Mon 8/254:12 pmSEA - SAN
Nonstop2h 51mHawaiian Airlines
Deal found 7/3$198
This Southwest deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:00 amSAN - SEA
1 stop4h 30mSouthwest
Sun 9/285:35 amSEA - SAN
1 stop7h 15mSouthwest
Deal found 7/3$212
This Alaska Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:57 pmSAN - SEA
1 stop5h 09mAlaska Airlines
Wed 8/132:05 pmSEA - SAN
Nonstop2h 50mAlaska Airlines
Deal found 7/2$230
This American Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:45 amSAN - SEA
1 stop7h 09mAmerican Airlines
Wed 10/811:04 amSEA - SAN
1 stop8h 41mAmerican Airlines
Deal found 7/1$231

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated July 3, 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 9/20

10:11 am-9:45 am

1 stop23h 34m

Seattle/Tacoma Intl

Sun 9/21

8:17 pm-3:02 pm

1 stop18h 45m

$193

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 7/31

9:40 pm-4:25 pm

1 stop18h 45m

Seattle/Tacoma Intl

Sun 8/10

5:30 pm-9:55 am

1 stop16h 25m

$194

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 7/9

7:04 pm-2:06 pm

1 stop19h 02m

Seattle/Tacoma Intl

Tue 7/15

5:30 pm-11:06 pm

1 stop5h 36m

$196

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 8/21

7:19 pm-10:21 pm

Nonstop3h 02m

Seattle/Tacoma Intl

Sun 8/24

7:10 am-10:04 am

Nonstop2h 54m

$197

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 8/23

8:00 am-12:29 pm

1 stop4h 29m

Seattle/Tacoma Intl

Tue 8/26

8:59 pm-11:53 pm

Nonstop2h 54m

$207

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 8/4

6:57 pm-12:06 am

1 stop5h 09m

Seattle/Tacoma Intl

Wed 8/13

2:05 pm-4:55 pm

Nonstop2h 50m

$230

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 8/27

7:30 am-10:34 am

Nonstop3h 04m

$109

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 8/16

1:03 pm-7:30 pm

1 stop6h 27m

$111

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 8/8

6:15 am-4:25 pm

1 stop10h 10m

$113

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 9/6

10:11 am-8:43 pm

2 stops10h 32m

$116

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 14 results
1
2

The best insider tips for San Diego to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip
Airports
SAN

Plan to arrive at SAN at least two hours before your flight to avoid stress from traffic congestion near the airport.

Read more about SANby Blane Bachelor
SEA

Use the Link light rail from SEA to downtown Seattle for an affordable and efficient 40-minute journey.

Read more about SEAby Brandon Schultz
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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 round-trip 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 round-trip flight from San Diego to Seattle. Price data was last updated on June 27, 2025.

The price you pay for your flight from San Diego to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $238). Flying from San Diego to Seattle in July is currently the most expensive (average of $390). 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 July 3, 2025.

It’s typically best to fly out from San Diego to Seattle in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from San Diego to Seattle?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Seattle. Price data was last updated on June 29, 2025.

Travelers seeking maximum savings on their San Diego to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 3, 2025.

The most flights from SAN to SEA are scheduled on a Wednesday (73 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (38 on average).

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 July 3, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from San Diego to Seattle by reading reviews from past customers. 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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
7.8
Good
2,545 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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.

  • What airports do I use to fly from San Diego to Seattle?

    If you book a flight from San Diego to Seattle, you will be flying from San Diego to Seattle/Tacoma Intl. Flights to Seattle/Tacoma Intl (SEA) from San Diego (SAN) take 2h 53m for a nonstop flight. There are 51 flights from San Diego to Seattle per day from 8 airlines.

  • How popular is this San Diego to Seattle flight route?

    Within the past month, 137 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?

    Flying on Frontier is currently your cheapest option to Seattle, with prices starting at $193. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and Delta, with the lowest prices starting at $194 and $197, respectively. Frontier is priced at 17% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $109. Users have also found prices from $110 and $113 on Frontier and Spirit Airlines, respectively.

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

    Consider Sun Country Air (100%), Air France (91%) or Delta (88%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Seattle.

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

    While on average a flight from San Diego to Seattle is generally $1,683, our data shows the cheapest flight currently is $113. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay $128 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 vacation 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 $238). Flying from San Diego to Seattle in July is currently the most expensive (average of $390). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Federal Way
Chehalis
Kirkland
Aberdeen
Shelton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Diego to Seattle

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Top 8 airlines flying from San Diego to Seattle

Discover the top 8 airlines that operate flights from San Diego to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$74Average$166FlexibilityNo cancel feeOn-time65%
FrontierCheapest$99Average$163FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$113Average$452FlexibilityNo cancel feeOn-time71%
DeltaCheapest$117Average$233FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$135Average$272FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$160Average$290FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$196Average$306FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$228Average$356FlexibilityNo cancel feeOn-time69%

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