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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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
3 Aug — 10 Aug1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Diego are usually found in January or September, booked 83 days in advance, depart on a Tuesday or Wednesday 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 July 2025.

Round-trip from

C$ 215

One-way from

C$ 134

Popular in

December

Cheapest in

January

Average price

C$ 421
Hawaiian Airlines
  • Hawaiian Airlines
  • 27/8-3/9
  • Nonstop
  • 6h 01m total
  • Seattle to San Diego
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Alaska Airlines
  • Alaska Airlines
  • 26/8
  • 1 total stop
  • 6h 37m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 14 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).
Search Deals
Average for round-trip flights in July 2025
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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 29 July 2025.

Tue 16/97:10 a.m.SEA - SAN
Nonstop2h 48mDelta
Tue 23/93:35 p.m.SAN - SEA
Nonstop2h 57mDelta
Deal found 29/7C$ 215
Wed 27/811:50 a.m.SEA - SAN
Nonstop2h 58mHawaiian Airlines
Sat 30/810:33 a.m.SAN - SEA
1 stop4h 22mHawaiian Airlines
Deal found 29/7C$ 229
Tue 23/97:00 a.m.SEA - SAN
1 stop5h 34mAlaska Airlines
Tue 23/93:06 p.m.SAN - SEA
1 stop6h 47mAlaska Airlines
Deal found 29/7C$ 235
Tue 9/98:00 a.m.SEA - SAN
1 stop4h 20mSouthwest
Tue 30/96:40 p.m.SAN - SEA
1 stop5h 25mSouthwest
Deal found 26/7C$ 236
Wed 30/76:25 a.m.SEA - SAN
1 stop16h 37mFrontier
Sun 10/89:30 p.m.SAN - SEA
1 stop12h 32mFrontier
Deal found 27/7C$ 313

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 July 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 27/8

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

Nonstop2h 54m

San Diego

Wed 3/9

9:30 a.m.-12:37 p.m.

Nonstop3h 07m

C$ 215

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 23/9

7:00 a.m.-12:34 p.m.

1 stop5h 34m

San Diego

Tue 23/9

3:06 p.m.-9:53 p.m.

1 stop6h 47m

C$ 235

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 9/9

8:00 a.m.-12:20 p.m.

1 stop4h 20m

San Diego

Tue 30/9

6:40 p.m.-12:05 a.m.

1 stop5h 25m

C$ 236

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 18/9

3:25 p.m.-6:11 p.m.

Nonstop2h 46m

San Diego

Wed 1/10

3:35 p.m.-6:32 p.m.

Nonstop2h 57m

C$ 257

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 28/8

3:25 p.m.-11:03 p.m.

1 stop7h 38m

San Diego

Mon 1/9

9:11 p.m.-11:01 p.m.

1 stop25h 50m

C$ 313

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 26/8

12:00 p.m.-6:37 p.m.

1 stop6h 37m

C$ 134

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 20/8

7:59 p.m.-10:51 p.m.

Nonstop2h 52m

C$ 150

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 18/8

9:03 p.m.-11:59 p.m.

Nonstop2h 56m

C$ 163

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 12/9

6:01 p.m.-11:24 p.m.

3 stops29h 23m

C$ 320

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 16/8

11:55 a.m.-7:30 p.m.

2 stops7h 35m

C$ 348

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

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 25 July 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 September is currently the most expensive (average of C$ 393). 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 July 2025.

It’s typically best to fly out from Seattle to San Diego in the afternoon. Doing so could potentially save you 43% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Seattle to San Diego

Explore weekly flight availability from Seattle to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 July 2025.

The most flights from SEA to SAN are scheduled on a Tuesday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

What’s the top layover airport for flights from Seattle to San Diego?

Share of one-stop round-trip flights from Seattle to San Diego chosen by Cheapflights users in the past 12 months, using the same layover each way.

Las Vegas (LAS) – chosen by Cheapflights users on 86% of one-stop itineraries from Seattle to San Diego on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to San Diego?

Average round-trip fare for 1-stop flights from Seattle to San Diego, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of C$ 203.

What’s the fastest layover option from Seattle to San Diego?

Shortest average travel time for 1-stop one-way flights from Seattle to San Diego, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 6h 30m.

Which airport typically offers the quickest layover for flights from Seattle to San Diego?

Average layover duration for 1-stop one-way flights from Seattle to San Diego, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 2h 31m.

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 July 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

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Frontier
5.9
Fair
3,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 50m on average. When it comes time to book airfare, you have a few options: there are 51 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 66 times in the past calendar month.

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

    Delta, at C$ 215, was found to be the cheapest airline from Seattle to San Diego.Alternate airlines to your destination round-trip include Hawaiian Airlines and Alaska Airlines. Delta is priced at 39% 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$ 134 on Alaska Airlines. Other airlines that offer cheap prices include Delta from C$ 150 and Hawaiian Airlines from C$ 163 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 (97%), LATAM Airlines (97%) or Delta (86%) 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, 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 September is currently the most expensive (average of C$ 393). 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 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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 133AverageC$ 301FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
FrontierCheapestC$ 137AverageC$ 269FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapestC$ 152AverageC$ 204FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapestC$ 172AverageC$ 318FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines 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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