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Cheap flights from Seattle to San Diego from C$ 129

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
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in September or January, booked 44 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 29 October 2025.

Round-trip from

C$ 240

One-way from

C$ 129

Popular in

December

Cheapest in

September

Average price

C$ 394

Good round-trip deal

C$ 304 or less

Good one-way deal

C$ 417 or less
United Airlines
  • United Airlines
  • 3/12-9/12
  • 2 total stops
  • 11h 37m total
  • Seattle to San Diego
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Alaska Airlines
  • Alaska Airlines
  • 9/12
  • 1 total stop
  • 6h 24m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Diego.
Search Deals
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

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 29 October 2025.

Wed 3/123:45 p.m.SEA - SAN
1 stop6h 45mUnited Airlines
Tue 9/124:08 p.m.SAN - SEA
1 stop4h 52mUnited Airlines
Deal found 26/10C$ 240
Sat 6/122:08 p.m.SEA - SAN
Nonstop2h 49mHawaiian Airlines
Tue 9/126:30 p.m.SAN - SEA
Nonstop3h 13mHawaiian Airlines
Deal found 27/10C$ 242
Mon 8/123:40 p.m.SEA - SAN
1 stop8h 19mMultiple Airlines
Thu 11/126:15 a.m.SAN - SEA
Nonstop3h 18mMultiple Airlines
Deal found 27/10C$ 246
Tue 9/124:47 p.m.SEA - SAN
Nonstop2h 46mAlaska Airlines
Sat 13/122:15 p.m.SAN - SEA
Nonstop3h 12mAlaska Airlines
Deal found 29/10C$ 247
Tue 9/128:10 a.m.SEA - SAN
2 stops7h 10mSouthwest
Thu 11/128:05 a.m.SAN - SEA
1 stop6h 20mSouthwest
Deal found 26/10C$ 254
Tue 2/127:10 a.m.SEA - SAN
1 stop9h 02mAlaska Airlines
Wed 10/126:15 a.m.SAN - SEA
1 stop8h 23mAlaska Airlines
Deal found 26/10C$ 256
Sat 13/128:31 p.m.SEA - SAN
1 stop12h 08mAlaska Airlines
Tue 16/126:15 a.m.SAN - SEA
1 stop8h 23mAlaska Airlines
Deal found 28/10C$ 257
Fri 5/123:40 p.m.SEA - SAN
1 stop8h 19mMultiple Airlines
Tue 9/129:10 a.m.SAN - SEA
1 stop5h 28mMultiple Airlines
Deal found 27/10C$ 258
Sun 23/119:20 p.m.SEA - SAN
Nonstop2h 50mAlaska Airlines
Tue 2/128:59 p.m.SAN - SEA
Nonstop3h 13mAlaska Airlines
Deal found 28/10C$ 261
Fri 12/128:14 p.m.SEA - SAN
1 stop24h 09mAlaska Airlines
Mon 15/129:37 p.m.SAN - SEA
1 stop10h 37mAlaska Airlines
Deal found 28/10C$ 264
Tue 2/1211:43 a.m.SEA - SAN
1 stop4h 47mAlaska Airlines
Sat 6/1212:31 p.m.SAN - SEA
1 stop8h 04mAlaska Airlines
Deal found 28/10C$ 265
Tue 9/1211:15 p.m.SEA - SAN
1 stop10h 45mAlaska Airlines
Tue 16/1211:41 a.m.SAN - SEA
Nonstop3h 16mAlaska Airlines
Deal found 29/10C$ 267

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 29 October 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

Tue 9/12

4:47 p.m.-7:33 p.m.

Nonstop2h 46m

San Diego

Sat 13/12

2:15 p.m.-5:27 p.m.

Nonstop3h 12m

C$ 247

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 3/12

1:10 p.m.-9:10 p.m.

1 stop8h 00m

San Diego

Mon 8/12

1:05 p.m.-8:40 p.m.

1 stop7h 35m

C$ 247

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 4/3

9:15 p.m.-12:07 a.m.

Nonstop2h 52m

San Diego

Sat 7/3

7:00 a.m.-9:55 a.m.

Nonstop2h 55m

C$ 247

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 7/1

7:30 p.m.-12:15 a.m.

1 stop4h 45m

San Diego

Tue 13/1

6:15 a.m.-3:44 p.m.

2 stops9h 29m

C$ 254

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 4/12

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

Nonstop2h 59m

San Diego

Tue 9/12

7:05 p.m.-10:23 p.m.

Nonstop3h 18m

C$ 261

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 4/3

9:15 p.m.-12:07 a.m.

Nonstop2h 52m

San Diego

Sun 8/3

7:00 a.m.-9:55 a.m.

Nonstop2h 55m

C$ 261

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 10/12

12:08 p.m.-3:06 p.m.

Nonstop2h 58m

San Diego

Sun 14/12

8:59 p.m.-12:12 a.m.

Nonstop3h 13m

C$ 261

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 16/1

5:59 p.m.-8:43 p.m.

Nonstop2h 44m

San Diego

Mon 19/1

6:50 a.m.-10:05 a.m.

Nonstop3h 15m

C$ 275

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 10/3

2:35 p.m.-8:50 p.m.

1 stop6h 15m

San Diego

Wed 11/3

5:00 p.m.-11:05 p.m.

1 stop6h 05m

C$ 279

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 20/11

7:00 a.m.-1:28 p.m.

1 stop6h 28m

San Diego

Sun 23/11

9:17 p.m.-8:13 a.m.

1 stop10h 56m

C$ 279

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 22 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 24 October 2025.

Booking 44 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, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 77). Flying from Seattle to San Diego in July is currently the most expensive (average of C$ 169). 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 29 October 2025.

It’s typically best to fly out from Seattle to San Diego in the afternoon. Doing so could potentially save you 26% 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 29 October 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
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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.
Alaska Airlines
8.0
Very good
11,206 reviews
Alaska Airlines
8.0
Very good
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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.
Delta
7.9
Good
7,993 reviews
Alaska Airlines
8.0
Very good
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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.
Hawaiian Airlines
7.8
Good
2,794 reviews
Alaska Airlines
8.0
Very good
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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.
Spirit Airlines
6.3
Okay
8,114 reviews
Alaska Airlines
8.0
Very good
11,206 reviews
Check prices

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

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?

    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 22 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 57 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. Alaska Airlines provides one of the quickest options available for as low as C$ 247. 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$ 96, 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 74% 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 (89%), Scandinavian Airlines (88%) or WestJet (88%) 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$ 164. On average you can expect to pay C$ 435. The most popular route, (Seattle/Tacoma Intl - San Diego), can usually be booked for C$ 211.

  • 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, June is the cheapest month in which you can book a flight from Seattle to San Diego (average of C$ 77). Flying from Seattle to San Diego in July is currently the most expensive (average of C$ 169). 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
La Mesa
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 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 96AverageC$ 317FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapestC$ 155AverageC$ 236FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapestC$ 191AverageC$ 330FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Hawaiian AirlinesCheapestC$ 202AverageC$ 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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