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$98+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in January or September, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap 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 July 28, 2025.

Round-trip from

$151
(Cheapflightsfares)

One-way from

$98
(Hawaiian Airlines)

Popular in

December

Cheapest in

January

Average price

$307

Good round-trip deal

$198 or less

Good one-way deal

$151 or less
From Seattle/Tacoma Intl to San Diego
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One-way flight from Seattle/Tacoma Intl to San Diego
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Highest demand for flights based on searches. 3% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 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 Seattle/Tacoma Intl to San Diego.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to San Diego.
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Find 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 July 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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.
Mon 8/115:30 pmSEA - SAN
1 stop5h 36mSpirit Airlines
Tue 8/126:15 amSAN - SEA
1 stop10h 10mSpirit Airlines
Deal found 7/27$151
This SmartFares deal was found by Cheapflights users on 7/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:53 amSEA - SAN
Nonstop3h 03mAlaska Airlines
Sun 9/76:15 amSAN - SEA
Nonstop3h 10mAlaska Airlines
Deal found 7/26$167
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/108:59 pmSEA - SAN
Nonstop2h 54mHawaiian Airlines
Wed 9/177:15 amSAN - SEA
Nonstop3h 05mHawaiian Airlines
Deal found 7/27$168
This CheapOair deal was found by Cheapflights users on 7/25. 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 8/97:48 pmSEA - SAN
1 stop14h 04mMultiple Airlines
Tue 8/126:15 amSAN - SEA
1 stop10h 10mMultiple Airlines
Deal found 7/25$169
This Southwest deal was found by Cheapflights users on 7/26. 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.
Mon 9/86:30 amSEA - SAN
1 stop5h 15mSouthwest
Mon 9/157:00 amSAN - SEA
1 stop4h 35mSouthwest
Deal found 7/26$172
This Delta deal was found by Cheapflights users on 7/27. 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.
Sat 9/207:10 amSEA - SAN
Nonstop2h 48mDelta
Tue 9/307:15 pmSAN - SEA
Nonstop3h 10mDelta
Deal found 7/27$177
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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.
Fri 12/59:17 amSEA - SAN
1 stop8h 42mFrontier
Sat 12/1310:52 amSAN - SEA
1 stop5h 59mFrontier
Deal found 7/27$195

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 July 28, 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

Mon 8/11

5:30 pm-11:06 pm

1 stop5h 36m

San Diego

Tue 8/12

6:15 am-4:25 pm

1 stop10h 10m

$151

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 9/6

9:53 am-12:56 pm

Nonstop3h 03m

San Diego

Sun 9/7

6:15 am-9:25 am

Nonstop3h 10m

$167

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 9/10

8:59 pm-11:53 pm

Nonstop2h 54m

San Diego

Wed 9/17

7:15 am-10:20 am

Nonstop3h 05m

$168

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 8/9

7:48 pm-9:52 am

1 stop14h 04m

San Diego

Tue 8/12

6:15 am-4:25 pm

1 stop10h 10m

$169

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 9/8

6:30 am-11:45 am

1 stop5h 15m

San Diego

Mon 9/15

7:00 am-11:35 am

1 stop4h 35m

$172

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 9/20

10:00 am-12:57 pm

Nonstop2h 57m

San Diego

Wed 10/1

3:35 pm-6:32 pm

Nonstop2h 57m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 8/23

12:40 pm-10:08 pm

1 stop9h 28m

San Diego

Sat 8/30

12:12 pm-8:51 pm

1 stop8h 39m

$198

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 9/27

1:12 pm-6:19 pm

1 stop5h 07m

$98

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 10/10

9:24 am-6:23 pm

1 stop8h 59m

$102

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 9/2

11:10 pm-8:58 am

1 stop9h 48m

$104

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 12 results
1
2

The best insider tips for Seattle to San Diego 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 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

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 July 25, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to San Diego, you should look to book at least 83 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, August is the cheapest month in which you can book a flight from Seattle to San Diego (average of $286). Flying from Seattle to San Diego in March is currently the most expensive (average of $366). 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 July 28, 2025.

It’s optimal to fly from Seattle to San Diego in the morning. By choosing this option you can save up to 27% 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 July 27, 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.

Weekly flight availability from Seattle to San Diego

Explore weekly flight availability from Seattle to San Diego. 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 28, 2025.

The most flights from SEA to SAN are scheduled on a Monday (66 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (45 on average).

What’s the top layover airport for flights from Seattle to San Diego?

Share of 1-stop round-trip flights from Seattle to San Diego chosen by Cheapflights users in the past 12 months, using the same layover each way.

Las Vegas (LAS) – chosen by Cheapflights users on 80% of 1-stop itineraries from Seattle to San Diego on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to San Diego?

Average round-trip fare for 1-stop flights from Seattle to San Diego, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $156.

What’s the fastest layover option from Seattle to San Diego?

Shortest average travel time for 1-stop one-way flights from Seattle to San Diego, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 6h 10m.

Which airport typically offers the quickest layover for flights from Seattle to San Diego?

Average layover duration for 1-stop one-way flights from Seattle to San Diego, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 6h 22m.

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 July 28, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Spirit Airlines
6.3
Okay
8,040 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 56 flights from Seattle/Tacoma Intl to San Diego, all of which are around 2h 45m 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 50 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, Spirit Airlines ($151), Alaska Airlines ($167), and Hawaiian Airlines ($168) offers the cheapest pricing from Seattle to San Diego. You may be able to fly from Seattle to San Diego for 41% 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 $98 on Hawaiian Airlines. Other airlines that offer cheap prices include Frontier from $102 and Alaska Airlines from $104 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 China Airlines (97%), LATAM Airlines (97%) and Delta (86%).

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

    On average you can expect to pay $421 for a flight from Seattle to San Diego. The cheapest flight overall is $108 while the most popular route, (Seattle/Tacoma Intl - San Diego) is currently priced at $151.

  • 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, August is the cheapest month in which you can book a flight from Seattle to San Diego (average of $286). Flying from Seattle to San Diego in March is currently the most expensive (average of $366). 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
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee

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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$77Average$155FlexibilityNo cancel feeOn-time65%
FrontierCheapest$101Average$210FlexibilityNo cancel feeOn-time62%
DeltaCheapest$117Average$249FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$134Average$281FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$138Average$311FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$156Average$372FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$173Average$336FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$176Average$311FlexibilityNo cancel feeOn-time69%

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