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$87+ Cheap flights from Seattle to San Diego (SEA - SAN)

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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Seattle to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in September or January, booked 44 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Seattle to San Diego

Cheapest flights from Seattle to San Diego
Explore the most affordable flight options available from Seattle to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Wed 1/141:35 pmSAN - SEA
1 stop26h 53mFrontier
Deal found 12/10$141
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Mon 1/121:04 pmSAN - SEA
1 stop6h 43mFrontier
Deal found 12/10$151
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Thu 1/159:12 pmSAN - SEA
1 stop19h 16mFrontier
Deal found 12/10$152
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Thu 1/89:19 pmSAN - SEA
1 stop19h 10mFrontier
Deal found 12/10$156
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/317:55 pmSEA - SAN
Nonstop2h 50mAlaska Airlines
Tue 1/136:15 amSAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 12/10$158
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:54 pmSEA - SAN
1 stop28h 21mFrontier
Wed 1/79:43 amSAN - SEA
1 stop23h 21mFrontier
Deal found 12/10$161
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mMultiple Airlines
Tue 1/134:01 pmSAN - SEA
Nonstop3h 10mMultiple Airlines
Deal found 12/10$164
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mMultiple Airlines
Fri 1/96:15 amSAN - SEA
Nonstop3h 13mMultiple Airlines
Deal found 12/10$166
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Tue 1/69:44 amSAN - SEA
1 stop8h 07mFrontier
Deal found 12/9$169
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:54 pmSEA - SAN
1 stop28h 21mFrontier
Wed 1/1412:00 pmSAN - SEA
1 stop23h 09mFrontier
Deal found 12/10$171
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - SAN
1 stop10h 34mMultiple Airlines
Wed 1/72:20 pmSAN - SEA
Nonstop3h 09mMultiple Airlines
Deal found 12/9$172

Find flight deals from Seattle to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Diego (SAN). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$119
(Southwest)

One-way from

$87
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$370

Good round-trip deal

$156 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San Diego flights.
Search Deals
From Seattle/Tacoma Intl to San Diego
Search Deals
One-way flight from Seattle/Tacoma Intl to San Diego
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Diego.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to San Diego 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 December 12, 2025.
Use the filters below to find and compare flights from Seattle to San Diego that are best for you.

Fly from

Seattle

Fly to

San Diego

Route

Depart

Return

Price

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 1/23

6:10 pm-8:58 pm

Nonstop2h 48m

San Diego

Tue 1/27

7:03 pm-10:15 pm

Nonstop3h 12m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 2/19

9:30 am-4:15 pm

1 stop6h 45m

San Diego

Mon 2/23

3:10 pm-10:50 pm

1 stop7h 40m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 1/22

3:21 pm-6:00 pm

Nonstop2h 39m

San Diego

Mon 1/26

1:45 pm-5:00 pm

Nonstop3h 15m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 1/14

1:20 pm-7:10 pm

1 stop5h 50m

San Diego

Sat 1/17

3:25 pm-7:55 pm

1 stop4h 30m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sun 2/15

3:15 pm-5:50 pm

Nonstop2h 35m

San Diego

Mon 2/23

1:40 pm-4:55 pm

Nonstop3h 15m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 1/29

11:20 am-3:30 pm

1 stop4h 10m

San Diego

Mon 2/2

3:40 pm-10:35 pm

1 stop6h 55m

$119

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 1/7

6:05 am-4:45 pm

2 stops10h 40m

San Diego

Tue 1/13

12:30 pm-6:35 pm

1 stop6h 05m

$124

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 1/7

9:30 am-3:55 pm

2 stops6h 25m

San Diego

Sat 1/17

2:40 pm-9:05 pm

1 stop6h 25m

$124

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 2/11

5:15 am-6:35 pm

2 stops13h 20m

San Diego

Sun 2/15

8:00 am-1:30 pm

1 stop5h 30m

$150

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sun 1/18

2:00 pm-4:40 pm

Nonstop2h 40m

San Diego

Fri 1/23

1:45 pm-5:00 pm

Nonstop3h 15m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Seattle to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to San Diego in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-San Diego flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Seattle 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 Seattle to San Diego

How far ahead should I book a flight from Seattle to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to San Diego. Price data was last updated on December 5, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to San Diego, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to San Diego?

Currently, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of $56). Flying from Seattle to San Diego in July is currently the most expensive (average of $121). 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 SEA to SAN?

Find hourly flight availability from Seattle to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s optimal to fly from Seattle to San Diego in the morning. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to San Diego. Price data was last updated on December 6, 2025.

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

The best insider tips for Seattle to San Diego flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to San Diego trip
Airports
SEA

Plan to arrive at SEA at least two hours before your flight. Use SEA Spot Saver for security appointments to reduce wait times.

Read more about SEABy Brandon Schultz
SAN

SAN is just three miles from downtown. Use Route 992 bus or free San Diego Flyer shuttle for convenient city access.

Read more about SANBy Blane Bachelor
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

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated December 12, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,005 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,817 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Spirit Airlines
6.3
Okay
8,178 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,084 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Diego. 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 Seattle to San Diego?

    Booking a flight from Seattle/Tacoma Intl (SEA) to San Diego (SAN) is your only option if you wish to fly from Seattle to San Diego. On a typical day, there are 36 flights from Seattle/Tacoma Intl to San Diego, all of which are around 2h 39m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Seattle/Tacoma Intl to San Diego.

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

    The Seattle/Tacoma Intl to San Diego flight path was viewed by 37 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to San Diego?

    Airlines like Alaska Airlines, Southwest, and Delta fly from Seattle to San Diego in about 2h 39m. The time it takes to get you to your destination can typically vary by up to 4h 06m. The distance from Seattle to San Diego is about 1051 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Spirit Airlines ($69), Frontier ($91), and Hawaiian Airlines ($104) offers the cheapest pricing from Seattle to San Diego. You may be able to fly from Seattle to San Diego for 74% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $37 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $66 and Alaska Airlines from $78 one-way.

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

    The top 3 most reliable airlines when flying from Seattle to San Diego are Air France (92%), Virgin Atlantic (85%) and WestJet (84%).

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

    On average you can expect to pay $472 for a flight from Seattle to San Diego. The cheapest flight overall is $69 while the most popular route, (Seattle/Tacoma Intl - San Diego) is currently priced at $99.

  • Can I find deals for flights from Seattle to San Diego that include hotel bookings?

    Yes. In addition to deals on Seattle to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Diego.

  • Can I find deals for business class flights from Seattle to San Diego?

    Yes. Cheapflights offers flight deals from Seattle to San Diego 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 Seattle to San Diego?

    Currently, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of $56). Flying from Seattle to San Diego in July is currently the most expensive (average of $121). 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
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
Julian
National City

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Top 8 airlines flying from Seattle to San Diego

Discover the top 8 airlines that operate flights from Seattle to San Diego. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$71Average$156FlexibilityNo cancel feeOn-time65%
FrontierCheapest$105Average$209FlexibilityNo cancel feeOn-time62%
DeltaCheapest$130Average$260FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$133Average$271FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$156Average$319FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$159Average$280FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$207Average$310FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$246Average$357FlexibilityNo cancel feeOn-time71%

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