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Cheap flights from Seattle to San Diego from C$ 149

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
12 Jul — 19 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in January or September, booked 74 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Seattle to San Diego

Enter your travel dates to find the best prices.

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 12 June 2026.

Tue 11/88:30 a.m.
SEA
-
SAN
Nonstop2h 55m
Southwest
Tue 18/85:00 p.m.
SAN
-
SEA
1 stop4h 45m
Southwest
Deal found 12/6C$ 261
Wed 19/87:11 a.m.
SEA
-
SAN
1 stop6h 33m
United Airlines
Sun 23/85:00 p.m.
SAN
-
SEA
1 stop4h 41m
United Airlines
Deal found 12/6C$ 264
Wed 19/88:30 a.m.
SEA
-
SAN
Nonstop2h 55m
Southwest
Tue 25/87:00 a.m.
SAN
-
SEA
Nonstop3h 05m
Southwest
Deal found 8/6C$ 270
Wed 19/85:20 p.m.
SEA
-
SAN
1 stop5h 27m
United Airlines
Tue 25/82:24 p.m.
SAN
-
SEA
2 stops6h 19m
United Airlines
Deal found 12/6C$ 271
Wed 4/117:00 a.m.
SEA
-
SAN
Nonstop2h 45m
Southwest
Wed 11/116:20 a.m.
SAN
-
SEA
1 stop6h 40m
Southwest
Deal found 12/6C$ 272
Tue 14/76:30 a.m.
SEA
-
SAN
1 stop7h 30m
Southwest
Wed 22/75:15 p.m.
SAN
-
SEA
1 stop6h 00m
Southwest
Deal found 12/6C$ 275
Wed 29/77:30 a.m.
SEA
-
SAN
1 stop6h 55m
Southwest
Wed 5/86:00 p.m.
SAN
-
SEA
Nonstop3h 00m
Southwest
Deal found 9/6C$ 278
Thu 22/109:05 p.m.
SEA
-
SAN
Nonstop2h 54m
Alaska Airlines
Wed 28/106:15 a.m.
SAN
-
SEA
Nonstop3h 13m
Alaska Airlines
Deal found 12/6C$ 282
Wed 5/83:35 p.m.
SEA
-
SAN
1 stop5h 55m
Southwest
Tue 11/87:00 a.m.
SAN
-
SEA
Nonstop3h 05m
Southwest
Deal found 8/6C$ 284
Wed 8/77:00 a.m.
SEA
-
SAN
1 stop4h 20m
Southwest
Tue 14/76:50 p.m.
SAN
-
SEA
1 stop5h 45m
Southwest
Deal found 8/6C$ 286
Thu 13/85:20 p.m.
SEA
-
SAN
1 stop7h 09m
United Airlines
Tue 18/83:56 p.m.
SAN
-
SEA
1 stop4h 47m
United Airlines
Deal found 7/6C$ 288

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 12 June 2026.

Round-trip from

C$ 261

One-way from

C$ 149

Popular in

June

Cheapest in

January

Average price

C$ 450

Good round-trip deal

C$ 219 or less
Southwest
  • Southwest
  • 11/8-18/8
  • 1 total stop
  • 7h 40m total
  • Seattle to San Diego
Search Deals
United Airlines
  • United Airlines
  • 19/8
  • 1 total stop
  • 4h 44m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip 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 629,999 searches. Data last updated 12 June 2026.
Use the filters below to find and compare flights from Seattle to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 26/8

5:30 p.m.-8:20 p.m.

Nonstop2h 50m

San Diego

Mon 31/8

4:50 p.m.-10:55 p.m.

1 stop6h 05m

C$ 306

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 9/7

9:45 a.m.-12:39 p.m.

Nonstop2h 54m

San Diego

Tue 14/7

7:00 p.m.-10:03 p.m.

Nonstop3h 03m

C$ 316

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 21/8

9:10 a.m.-11:55 a.m.

Nonstop2h 45m

San Diego

Tue 25/8

12:20 p.m.-5:30 p.m.

1 stop5h 10m

C$ 318

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 25/8

5:55 a.m.-11:45 a.m.

2 stops5h 50m

San Diego

Sun 30/8

5:15 p.m.-8:10 p.m.

Nonstop2h 55m

C$ 324
Quickest round-trip

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 20/8

5:50 p.m.-8:45 p.m.

Nonstop2h 55m

San Diego

Mon 24/8

4:40 p.m.-7:35 p.m.

Nonstop2h 55m

C$ 327

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 26/8

2:55 p.m.-9:35 p.m.

1 stop6h 40m

San Diego

Sun 30/8

5:15 p.m.-8:10 p.m.

Nonstop2h 55m

C$ 328

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 30/9

7:15 a.m.-10:09 a.m.

Nonstop2h 54m

San Diego

Sat 3/10

7:00 a.m.-10:05 a.m.

Nonstop3h 05m

C$ 330

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 22/9

12:04 p.m.-3:03 p.m.

Nonstop2h 59m

San Diego

Sat 26/9

4:00 p.m.-6:57 p.m.

Nonstop2h 57m

C$ 331

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 30/10

6:40 p.m.-9:25 p.m.

Nonstop2h 45m

San Diego

Mon 2/11

6:00 p.m.-9:10 p.m.

Nonstop3h 10m

C$ 334
Cheapest one-way

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 4/8

5:55 a.m.-11:45 a.m.

2 stops5h 50m

C$ 156

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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?

Booking 50 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, January is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 268). Flying from Seattle to San Diego in June is currently the most expensive (average of C$ 450). 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 12 June 2026.

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.

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 8 June 2026.

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

How much does it cost to fly round-trip from Seattle to San Diego?

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 12 June 2026.
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
7.9
Good
12,489 reviews
Check prices

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Alaska Airlines
7.9
Good
12,489 reviews
Alaska Airlines
7.9
Good
12,489 reviews
Check prices

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Southwest
7.9
Good
4,233 reviews
Alaska Airlines
7.9
Good
12,489 reviews
Check prices

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Delta
7.9
Good
8,399 reviews
Alaska Airlines
7.9
Good
12,489 reviews
Check prices

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Hawaiian Airlines
7.8
Good
2,830 reviews
Alaska Airlines
7.9
Good
12,489 reviews
Check prices

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

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 44m on average. When it comes time to book airfare, you have a few options: there are 28 outbound flights from Seattle/Tacoma Intl to San Diego offered by 4 different airlines.

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

    Flights from Seattle/Tacoma Intl to San Diego have been viewed 23 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 50m. Southwest provides one of the quickest options available for as low as C$ 306. Seattle and San Diego are separated by a distance of 1691 km. Generally, flights for this route are direct.

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

    Delta, at C$ 138, was found to be the cheapest airline from Seattle to San Diego.Alternate airlines to your destination round-trip include Alaska Airlines and Hawaiian Airlines. Delta is priced at 63% lower than the current average price of a flight leaving 3 months from now.

  • 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 Qatar Airways (92%), Korean Air (91%) or Alaska Airlines (91%) 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$ 205. On average you can expect to pay C$ 380. The most popular route, (Seattle/Tacoma Intl - San Diego), can usually be booked for C$ 304.

  • 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, January is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 268). Flying from Seattle to San Diego in June is currently the most expensive (average of C$ 450). 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
El Cajon
La Mesa
Borrego Springs

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Seattle to San Diego

Discover the top 4 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 12 June 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 138AverageC$ 304FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 145AverageC$ 423FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Hawaiian AirlinesCheapestC$ 156AverageC$ 412FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
SouthwestCheapestC$ 358AverageC$ 393FlexibilityNo 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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