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Cheap flights from Seattle to San Diego from C$ 158

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
25 Aug — 1 Sep1
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 51 days in advance, depart on a Saturday or Tuesday 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 26 July 2026.

Thu 24/93:25 p.m.
SEA
-
SAN
2 stops5h 50m
Southwest
Mon 28/98:30 a.m.
SAN
-
SEA
Nonstop3h 00m
Southwest
Deal found 24/7C$ 242
Tue 18/85:30 p.m.
SEA
-
SAN
Nonstop2h 50m
Southwest
Sat 22/811:10 a.m.
SAN
-
SEA
1 stop7h 45m
Southwest
Deal found 25/7C$ 244
Tue 25/89:45 a.m.
SEA
-
SAN
Nonstop2h 54m
Delta
Sat 29/87:03 a.m.
SAN
-
SEA
Nonstop3h 02m
Delta
Deal found 21/7C$ 248
Wed 9/95:55 a.m.
SEA
-
SAN
2 stops5h 50m
Southwest
Sat 12/92:50 p.m.
SAN
-
SEA
2 stops5h 40m
Southwest
Deal found 22/7C$ 249
Fri 18/95:50 p.m.
SEA
-
SAN
Nonstop3h 00m
Southwest
Mon 21/94:50 p.m.
SAN
-
SEA
1 stop6h 10m
Southwest
Deal found 24/7C$ 251
Sat 10/109:59 a.m.
SEA
-
SAN
1 stop8h 30m
Alaska Airlines
Wed 14/105:21 p.m.
SAN
-
SEA
Nonstop3h 09m
Alaska Airlines
Deal found 22/7C$ 254
Wed 19/85:55 a.m.
SEA
-
SAN
2 stops5h 50m
Southwest
Wed 26/88:15 a.m.
SAN
-
SEA
1 stop6h 55m
Southwest
Deal found 22/7C$ 256
Thu 22/108:18 a.m.
SEA
-
SAN
1 stop13h 32m
Alaska Airlines
Wed 28/109:08 a.m.
SAN
-
SEA
Nonstop3h 11m
Alaska Airlines
Deal found 22/7C$ 261
Fri 25/97:41 p.m.
SEA
-
SAN
Nonstop2h 52m
Delta
Mon 28/96:54 p.m.
SAN
-
SEA
Nonstop3h 11m
Delta
Deal found 22/7C$ 264
Wed 26/811:41 a.m.
SEA
-
SAN
Nonstop3h 03m
Alaska Airlines
Mon 31/89:16 p.m.
SAN
-
SEA
1 stop10h 54m
Alaska Airlines
Deal found 22/7C$ 268

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 26 July 2026.

Round-trip from

C$ 242

One-way from

C$ 158

Popular in

June

Cheapest in

January

Average price

C$ 450
Alaska Airlines
  • Alaska Airlines
  • 24/9-27/9
  • Nonstop
  • 6h 05m total
  • Seattle to San Diego
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 17/10
  • 1 total stop
  • 5h 42m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 26 July 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 2/9

7:40 a.m.-2:15 p.m.

1 stop6h 35m

San Diego

Tue 8/9

4:10 p.m.-9:45 p.m.

2 stops5h 35m

C$ 242
Quickest round-trip

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 25/8

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

Nonstop2h 54m

San Diego

Sat 29/8

7:03 a.m.-10:05 a.m.

Nonstop3h 02m

C$ 248

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 9/10

5:10 p.m.-8:00 p.m.

Nonstop2h 50m

San Diego

Mon 12/10

6:50 a.m.-1:30 p.m.

1 stop6h 40m

C$ 256

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 25/8

7:40 a.m.-10:39 a.m.

Nonstop2h 59m

San Diego

Sat 29/8

1:57 p.m.-7:09 p.m.

1 stop5h 12m

C$ 273

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 20/8

8:49 p.m.-11:44 p.m.

Nonstop2h 55m

San Diego

Mon 24/8

8:15 a.m.-10:00 p.m.

1 stop13h 45m

C$ 273
Cheapest one-way
Quickest one-way

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 5/10

7:41 p.m.-10:33 p.m.

Nonstop2h 52m

C$ 161

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 18/9

3:25 p.m.-9:10 p.m.

2 stops5h 45m

C$ 161

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 13/8

10:01 a.m.-3:14 p.m.

1 stop5h 13m

C$ 165

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 22/10

8:18 a.m.-9:50 p.m.

1 stop13h 32m

C$ 172

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 20/8

7:18 a.m.-9:47 p.m.

1 stop14h 29m

C$ 172

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/7

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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$ 271). Flying from Seattle to San Diego in June is currently the most expensive (average of C$ 462). 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 26 July 2026.

It’s typically best to fly out from Seattle to San Diego in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying in the evening, 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 18 July 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?

Airfare is below average for this route at the moment.

Seattle to San Diego flights typically cost between C$ 321 and C$ 513 in September.
The cheapest round-trip price found within the last 5 days was C$ 242 on Alaska Airlines (24 Sep-27 Sep).

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 26 July 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, 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.
Southwest
8.0
Very good
4,231 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
8.0
Very good
4,231 reviews
Southwest
8.0
Very good
4,231 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Alaska Airlines
7.9
Good
12,717 reviews
Southwest
8.0
Very good
4,231 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Delta
7.8
Good
8,487 reviews
Southwest
8.0
Very good
4,231 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Hawaiian Airlines
7.8
Good
2,821 reviews
Southwest
8.0
Very good
4,231 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

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 54m. Southwest provides one of the quickest options available for as low as C$ 248. 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$ 139, 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 64% 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 KLM (88%), Delta (86%) or Korean Air (85%) as they are the most reliable in getting you off to your destination on time.

  • 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$ 271). Flying from Seattle to San Diego in June is currently the most expensive (average of C$ 462). 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

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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 26 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 139AverageC$ 260FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 147AverageC$ 414FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Hawaiian AirlinesCheapestC$ 157AverageC$ 415FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
SouthwestCheapestC$ 361AverageC$ 396FlexibilityNo 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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