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Cheap flights from Seattle to San Diego from C$ 126

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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
27 May — 3 Jun1
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 Tuesday or Saturday and return on a Monday

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 27 April 2026.

Wed 20/511:45 a.m.
SEA
-
SAN
Nonstop3h 03m
Delta
Wed 27/53:45 p.m.
SAN
-
SEA
Nonstop3h 16m
Delta
Deal found 27/4C$ 225
Tue 19/512:10 p.m.
SEA
-
SAN
Nonstop2h 55m
Southwest
Wed 27/512:45 p.m.
SAN
-
SEA
1 stop7h 35m
Southwest
Deal found 27/4C$ 239
Fri 21/85:22 p.m.
SEA
-
SAN
1 stop5h 20m
United Airlines
Mon 24/85:00 p.m.
SAN
-
SEA
1 stop4h 56m
United Airlines
Deal found 23/4C$ 250
Wed 17/63:25 p.m.
SEA
-
SAN
1 stop6h 45m
Southwest
Wed 24/66:40 p.m.
SAN
-
SEA
1 stop4h 30m
Southwest
Deal found 27/4C$ 253
Tue 19/51:21 p.m.
SEA
-
SAN
2 stops6h 53m
United Airlines
Wed 27/57:41 p.m.
SAN
-
SEA
1 stop5h 32m
United Airlines
Deal found 27/4C$ 257
Sat 30/59:55 a.m.
SEA
-
SAN
1 stop6h 36m
Alaska Airlines
Sat 30/57:30 p.m.
SAN
-
SEA
Nonstop3h 15m
Alaska Airlines
Deal found 22/4C$ 260
Sat 16/57:26 a.m.
SEA
-
SAN
Nonstop2h 56m
Alaska Airlines
Wed 20/55:17 p.m.
SAN
-
SEA
Nonstop3h 11m
Alaska Airlines
Deal found 24/4C$ 261
Wed 26/88:30 a.m.
SEA
-
SAN
Nonstop2h 55m
Southwest
Tue 1/96:00 p.m.
SAN
-
SEA
Nonstop3h 00m
Southwest
Deal found 22/4C$ 264
Fri 5/62:25 p.m.
SEA
-
SAN
Nonstop2h 55m
Southwest
Tue 9/62:40 p.m.
SAN
-
SEA
1 stop4h 10m
Southwest
Deal found 27/4C$ 269
Sat 16/511:15 a.m.
SEA
-
SAN
Nonstop2h 50m
Southwest
Tue 19/54:30 p.m.
SAN
-
SEA
1 stop6h 25m
Southwest
Deal found 25/4C$ 275

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 27 April 2026.

Round-trip from

C$ 225

One-way from

C$ 126

Popular in

April

Cheapest in

January

Average price

C$ 433

Good one-way deal

C$ 368 or less
Delta
  • Delta
  • 20/5-27/5
  • Nonstop
  • 6h 19m total
  • Seattle to San Diego
Search Deals
United Airlines
  • United Airlines
  • 24/5
  • 1 total stop
  • 5h 23m total
  • Seattle to San Diego
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a one-way 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 27 April 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

Tue 2/6

1:30 p.m.-6:39 p.m.

1 stop5h 09m

San Diego

Tue 9/6

4:09 p.m.-11:10 p.m.

1 stop7h 01m

C$ 250

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sat 16/5

7:35 p.m.-10:26 p.m.

Nonstop2h 51m

San Diego

Mon 18/5

3:45 p.m.-7:01 p.m.

Nonstop3h 16m

C$ 297

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 26/5

9:45 a.m.-12:42 p.m.

Nonstop2h 57m

San Diego

Wed 27/5

1:37 p.m.-4:44 p.m.

Nonstop3h 07m

C$ 309

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 12/5

3:48 p.m.-7:58 a.m.

1 stop16h 10m

San Diego

Wed 13/5

10:11 a.m.-1:25 p.m.

Nonstop3h 14m

C$ 329

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 26/5

7:26 a.m.-10:22 a.m.

Nonstop2h 56m

San Diego

Wed 27/5

8:01 a.m.-4:51 p.m.

1 stop8h 50m

C$ 348
Quickest round-trip

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 1/6

3:20 p.m.-6:05 p.m.

Nonstop2h 45m

San Diego

Wed 3/6

7:15 a.m.-10:28 a.m.

Nonstop3h 13m

C$ 351

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 26/5

5:06 p.m.-11:54 p.m.

1 stop6h 48m

San Diego

Wed 27/5

1:39 p.m.-6:47 p.m.

1 stop5h 08m

C$ 374
Cheapest one-way

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 29/5

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

1 stop7h 10m

C$ 126

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 18/6

5:04 p.m.-11:54 p.m.

1 stop6h 50m

C$ 126

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 19/5

12:10 p.m.-3:05 p.m.

Nonstop2h 55m

C$ 145

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/4

Showing 1-10 of 18 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$ 262). Flying from Seattle to San Diego in April is currently the most expensive (average of C$ 433). 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 27 April 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 April 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 mornings 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 27 April 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
4,321 reviews
Check prices

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,321 reviews
Southwest
8.0
Very good
4,321 reviews
Check prices

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,300 reviews
Southwest
8.0
Very good
4,321 reviews
Check prices

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,463 reviews
Southwest
8.0
Very good
4,321 reviews
Check prices

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Hawaiian Airlines
7.8
Good
2,837 reviews
Southwest
8.0
Very good
4,321 reviews
Check prices

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 22 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 51m. United Airlines provides one of the quickest options available for as low as C$ 297. 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?

    Alaska Airlines, at C$ 134, was found to be the cheapest airline from Seattle to San Diego.Alternate airlines to your destination round-trip include Delta and Hawaiian Airlines. Alaska Airlines 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 Japan Airlines (88%), Air Tahiti Nui (86%) or Hawaiian Airlines (82%) 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$ 141. On average you can expect to pay C$ 436. The most popular route, (Seattle/Tacoma Intl - San Diego), can usually be booked for C$ 331.

  • 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$ 262). Flying from Seattle to San Diego in April is currently the most expensive (average of C$ 433). 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 27 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 134AverageC$ 391FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapestC$ 135AverageC$ 304FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 153AverageC$ 403FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
SouthwestCheapestC$ 350AverageC$ 385FlexibilityNo 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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