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Cheap flights from Seattle to San Diego from C$ 134

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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in September or January, booked 83 days in advance, depart on a Tuesday or Thursday and return on a Monday

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 11 September 2025.

Round-trip from

C$ 224

One-way from

C$ 134

Popular in

December

Cheapest in

September

Average price

C$ 273

Good round-trip deal

C$ 272 or less

Good one-way deal

C$ 164 or less
Southwest
  • Southwest
  • 13/11-17/11
  • 2 total stops
  • 11h 00m total
  • Seattle to San Diego
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Hawaiian Airlines
  • Hawaiian Airlines
  • 9/12
  • 1 total stop
  • 4h 57m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
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 11 September 2025.

Thu 13/1112:40 p.m.SEA - SAN
1 stop4h 15mSouthwest
Mon 17/113:15 p.m.SAN - SEA
1 stop7h 40mSouthwest
Deal found 10/9C$ 224
Sat 8/1110:15 a.m.SEA - SAN
2 stops7h 35mSouthwest
Tue 11/116:30 a.m.SAN - SEA
1 stop5h 05mSouthwest
Deal found 9/9C$ 229
Thu 16/106:30 a.m.SEA - SAN
1 stop5h 50mSouthwest
Mon 20/105:00 p.m.SAN - SEA
1 stop5h 45mSouthwest
Deal found 11/9C$ 231
Wed 8/107:00 a.m.SEA - SAN
1 stop5h 16mHawaiian Airlines
Sat 11/107:50 p.m.SAN - SEA
Nonstop3h 16mHawaiian Airlines
Deal found 10/9C$ 236
Sat 4/103:30 p.m.SEA - SAN
1 stop6h 05mSouthwest
Wed 8/103:35 p.m.SAN - SEA
2 stops6h 25mSouthwest
Deal found 11/9C$ 240
Tue 14/107:00 a.m.SEA - SAN
1 stop5h 16mAlaska Airlines
Tue 14/101:52 p.m.SAN - SEA
1 stop4h 58mAlaska Airlines
Deal found 11/9C$ 241
Wed 1/102:55 p.m.SEA - SAN
1 stop6h 55mSouthwest
Tue 21/103:35 p.m.SAN - SEA
2 stops6h 25mSouthwest
Deal found 10/9C$ 243
Wed 12/116:15 a.m.SEA - SAN
2 stops7h 20mSouthwest
Wed 12/114:10 p.m.SAN - SEA
1 stop4h 30mSouthwest
Deal found 9/9C$ 244
Sat 4/1010:00 a.m.SEA - SAN
Nonstop2h 57mDelta
Tue 14/103:15 p.m.SAN - SEA
Nonstop3h 04mDelta
Deal found 11/9C$ 245
Thu 9/106:00 a.m.SEA - SAN
1 stop6h 55mSouthwest
Sat 11/104:35 p.m.SAN - SEA
1 stop5h 30mSouthwest
Deal found 11/9C$ 247
Wed 22/107:00 a.m.SEA - SAN
1 stop5h 16mHawaiian Airlines
Mon 27/106:38 p.m.SAN - SEA
Nonstop3h 10mHawaiian Airlines
Deal found 11/9C$ 249
Thu 20/119:25 a.m.SEA - SAN
1 stop4h 50mSouthwest
Tue 25/117:40 p.m.SAN - SEA
1 stop5h 45mSouthwest
Deal found 10/9C$ 252

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 629,999 searches. Data last updated 11 September 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

Thu 13/11

12:40 p.m.-4:55 p.m.

1 stop4h 15m

San Diego

Mon 17/11

3:15 p.m.-10:55 p.m.

1 stop7h 40m

C$ 224

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 11/10

7:45 p.m.-10:31 p.m.

Nonstop2h 46m

San Diego

Sat 18/10

7:03 p.m.-10:15 p.m.

Nonstop3h 12m

C$ 245

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 8/10

8:10 p.m.-11:05 p.m.

Nonstop2h 55m

San Diego

Tue 14/10

6:25 p.m.-9:32 p.m.

Nonstop3h 07m

C$ 245

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 14/1

7:20 a.m.-10:10 a.m.

Nonstop2h 50m

San Diego

Tue 20/1

2:45 p.m.-5:53 p.m.

Nonstop3h 08m

C$ 245

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 4/10

10:00 a.m.-12:57 p.m.

Nonstop2h 57m

San Diego

Tue 14/10

3:15 p.m.-6:19 p.m.

Nonstop3h 04m

C$ 245

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 3/10

8:59 p.m.-11:53 p.m.

Nonstop2h 54m

San Diego

Tue 21/10

8:00 a.m.-11:12 a.m.

Nonstop3h 12m

C$ 259

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 3/10

8:59 p.m.-11:53 p.m.

Nonstop2h 54m

San Diego

Sat 18/10

6:25 p.m.-9:32 p.m.

Nonstop3h 07m

C$ 259

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 19/11

7:55 p.m.-10:47 p.m.

Nonstop2h 52m

San Diego

Sun 23/11

6:15 a.m.-9:36 a.m.

Nonstop3h 21m

C$ 259

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 5/12

7:55 p.m.-10:45 p.m.

Nonstop2h 50m

San Diego

Sat 13/12

11:05 a.m.-2:22 p.m.

Nonstop3h 17m

C$ 259

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 2/10

7:10 a.m.-9:58 a.m.

Nonstop2h 48m

San Diego

Sat 4/10

1:55 p.m.-4:55 p.m.

Nonstop3h 00m

C$ 259

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 21 results
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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 29 August 2025.

Booking 83 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Diego. 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 Seattle to San Diego?

Currently, May is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 289). Flying from Seattle to San Diego in November is currently the most expensive (average of C$ 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 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 11 September 2025.

It’s typically best to fly out from Seattle to San Diego in the afternoon. Doing so could potentially save you 27% on the flight price compared to flying at noon, which is usually more expensive.

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 11 September 2025.
Read reviews from past customers who have flown Alaska Airlines,Southwest, andDelta from Seattle to San Diego. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Spirit Airlines
6.3
Okay
8,023 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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?

    To fly from Seattle to San Diego, you need to book a flight from Seattle/Tacoma Intl (SEA) to San Diego (SAN). Nonstop flights to San Diego from Seattle/Tacoma Intl take 2h 46m on average. When it comes time to book airfare, you have a few options: there are 40 outbound flights from Seattle/Tacoma Intl to San Diego offered by 5 different airlines.

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

    Flights from Seattle/Tacoma Intl to San Diego have been viewed 61 times in the past calendar month.

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

    A quick flight from Seattle to San Diego can take about 2h 46m. Southwest provides one of the quickest options available for as low as C$ 245. Seattle and San Diego are separated by a distance of 1691 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Delta, at C$ 109, was found to be the cheapest airline from Seattle to San Diego.Alternate airlines to your destination round-trip include Spirit Airlines and Alaska Airlines. Delta is priced at 70% lower than the current average price of a flight leaving 3 months from now.

  • 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 C$ 136 on Hawaiian Airlines. Other airlines that offer cheap prices include United Airlines from C$ 137 and Southwest from C$ 144 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to San Diego consider choosing China Airlines (100%), Aeromexico (100%) or LATAM Airlines (100%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Seattle to San Diego is C$ 136. On average you can expect to pay C$ 237. The most popular route, (Seattle/Tacoma Intl - San Diego), can usually be booked for C$ 301.

  • 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, May is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 289). Flying from Seattle to San Diego in November is currently the most expensive (average of C$ 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

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Borrego Springs
El Cajon

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Alternative routes for Seattle to San Diego

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Top 5 airlines flying from Seattle to San Diego

Discover the top 5 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 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 109AverageC$ 315FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapestC$ 153AverageC$ 234FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapestC$ 189AverageC$ 346FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Hawaiian AirlinesCheapestC$ 201AverageC$ 408FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
SouthwestCheapestC$ 355AverageC$ 390FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to San Diego?

Deals for Seattle to San Diego flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to San Diego?

Cheapflights simply makes it quick and affordable to book flights from Seattle to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to San Diego with no change fees?

Certainly. Search results for flights to San Diego from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to San Diego become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Diego from Seattle today and book when prices fit your budget.

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