San Diego

$94+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
Oct 19 — Oct 261
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in January or September, booked 54 days in advance, depart on a Wednesday or Tuesday 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 September 19, 2025.

Round-trip from

$177
(Delta)

One-way from

$94
(Southwest)

Popular in

December

Cheapest in

January

Average price

$222

Good round-trip deal

$197 or less

Good one-way deal

$127 or less
From Seattle/Tacoma Intl to San Diego
One-way flight from Seattle/Tacoma Intl to San Diego
Highest demand for flights based on searches. 3% potential increase in price ($10 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Diego.
Price to beat on a one-way flight from Seattle/Tacoma Intl to San Diego.

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 September 19, 2025.

This Delta deal was found by Cheapflights users on 9/18. 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 10/117:45 pmSEA - SAN
Nonstop2h 46mDelta
Sat 10/186:15 amSAN - SEA
Nonstop3h 10mDelta
Deal found 9/18$177
This Southwest deal was found by Cheapflights users on 9/16. 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.
Sat 10/117:05 amSEA - SAN
1 stop8h 40mSouthwest
Wed 10/153:35 pmSAN - SEA
2 stops6h 25mSouthwest
Deal found 9/16$178
This Trip.com deal was found by Cheapflights users on 9/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:07 pmSEA - SAN
Nonstop2h 52mHawaiian Airlines
Sat 11/810:30 amSAN - SEA
1 stop5h 31mHawaiian Airlines
Deal found 9/16$179
This Orbitz deal was found by Cheapflights users on 9/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/61:47 pmSEA - SAN
1 stop9h 30mMultiple Airlines
Wed 10/88:11 amSAN - SEA
1 stop6h 48mMultiple Airlines
Deal found 9/16$181
This United Airlines deal was found by Cheapflights users on 9/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/113:28 pmSEA - SAN
1 stop5h 21mUnited Airlines
Tue 10/1411:08 amSAN - SEA
2 stops10h 07mUnited Airlines
Deal found 9/16$182
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Sat 10/258:10 pmSEA - SAN
Nonstop2h 55mHawaiian Airlines
Mon 10/276:15 amSAN - SEA
Nonstop3h 10mHawaiian Airlines
Deal found 9/18$183
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Fri 11/72:22 pmSEA - SAN
1 stop9h 28mMultiple Airlines
Tue 11/118:03 amSAN - SEA
1 stop6h 52mMultiple Airlines
Deal found 9/17$184
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/17:00 amSEA - SAN
1 stop15h 24mMultiple Airlines
Wed 10/81:52 pmSAN - SEA
1 stop4h 58mMultiple Airlines
Deal found 9/16$185
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sun 10/56:12 amSEA - SAN
1 stop13h 55mMultiple Airlines
Tue 10/71:52 pmSAN - SEA
1 stop4h 58mMultiple Airlines
Deal found 9/16$186
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 11/197:55 pmSEA - SAN
Nonstop2h 52mDelta
Sun 11/236:15 amSAN - SEA
Nonstop3h 21mDelta
Deal found 9/16$187
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 9/256:12 amSEA - SAN
1 stop13h 55mFrontier
Tue 9/307:15 amSAN - SEA
1 stop15h 44mFrontier
Deal found 9/16$188
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:12 amSEA - SAN
1 stop13h 55mFrontier
Sat 10/47:15 amSAN - SEA
1 stop13h 24mFrontier
Deal found 9/16$189

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 September 19, 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

Wed 11/19

7:55 pm-10:47 pm

Nonstop2h 52m

San Diego

Sun 11/23

6:15 am-9:36 am

Nonstop3h 21m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 10/13

9:35 am-2:30 pm

1 stop4h 55m

San Diego

Mon 10/20

5:00 pm-10:45 pm

1 stop5h 45m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/18

11:25 am-2:11 pm

Nonstop2h 46m

San Diego

Tue 10/21

3:15 pm-6:19 pm

Nonstop3h 04m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 10/23

6:30 am-12:20 pm

1 stop5h 50m

San Diego

Mon 10/27

7:35 pm-12:50 am

1 stop5h 15m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/11

7:45 pm-10:31 pm

Nonstop2h 46m

San Diego

Wed 10/15

1:40 pm-4:50 pm

Nonstop3h 10m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 10/28

7:45 pm-10:31 pm

Nonstop2h 46m

San Diego

Tue 11/4

1:40 pm-4:50 pm

Nonstop3h 10m

$177

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/11

7:05 am-3:45 pm

1 stop8h 40m

San Diego

Wed 10/15

3:35 pm-10:00 pm

2 stops6h 25m

$178

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/11

3:28 pm-8:49 pm

1 stop5h 21m

San Diego

Tue 10/14

11:08 am-9:15 pm

2 stops10h 07m

$182

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 11/28

5:50 am-11:35 am

1 stop5h 45m

San Diego

Tue 12/9

1:30 pm-10:55 pm

1 stop9h 25m

$187

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 10/18

7:45 pm-10:31 pm

Nonstop2h 46m

San Diego

Thu 10/23

1:40 pm-4:50 pm

Nonstop3h 10m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 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 September 12, 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, 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 September 19, 2025.

It’s optimal to fly from Seattle to San Diego in the evening. By choosing this option you can save up to 25% 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 September 14, 2025.

Travelers seeking maximum savings on their Seattle to San Diego flight should consider departing on Wednesday mornings 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.

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 September 19, 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.

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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.

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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.
8.0
Very good

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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.

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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.

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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.

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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 42 flights from Seattle/Tacoma Intl to San Diego, all of which are around 2h 46m 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?

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

    Airlines like Delta and Southwest fly from Seattle to San Diego in about 2h 52m. The time it takes to get you to your destination can typically vary by up to 2h 03m. 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 ($71), Frontier ($102), and Delta ($132) offers the cheapest pricing from Seattle to San Diego. You may be able to fly from Seattle to San Diego for 73% 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 $94 on Southwest. Other airlines that offer cheap prices include Hawaiian Airlines from $94 and Alaska Airlines from $98 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 (100%), Aeromexico (100%) and LATAM Airlines (100%).

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

    On average you can expect to pay $430 for a flight from Seattle to San Diego. The cheapest flight overall is $98 while the most popular route, (Seattle/Tacoma Intl - San Diego) is currently priced at $148.

  • 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City

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Alternative routes for Seattle to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$71Average$155FlexibilityNo cancel feeOn-time65%
FrontierCheapest$102Average$215FlexibilityNo cancel feeOn-time62%
DeltaCheapest$132Average$256FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$132Average$278FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$156Average$320FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$156Average$306FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$176Average$321FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$226Average$311FlexibilityNo cancel feeOn-time71%

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