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$59+ Cheap flights from Washington to San Diego (SAN)

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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAN
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap flight deals from Washington to San Diego

Cheapest flights from Washington to San Diego
Explore the most affordable flight options available from Washington to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:34 pm
SEA
-
SAN
1 stop15h 43m
Frontier
Mon 4/206:25 am
SAN
-
SEA
1 stop27h 02m
Frontier
Deal found 2/19$121
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:40 am
SEA
-
SAN
1 stop5h 15m
Southwest
Tue 4/214:30 pm
SAN
-
SEA
2 stops7h 25m
Southwest
Deal found 2/18$122
This Southwest deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/252:35 pm
SEA
-
SAN
Nonstop2h 40m
Southwest
Tue 3/311:50 pm
SAN
-
SEA
1 stop5h 45m
Southwest
Deal found 2/17$127
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/99:36 pm
SEA
-
SAN
1 stop15h 37m
Frontier
Wed 3/113:16 pm
SAN
-
SEA
1 stop5h 47m
Frontier
Deal found 2/16$128
This Trip.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/173:40 pm
SEA
-
SAN
Nonstop2h 50m
Hawaiian Airlines
Tue 3/246:15 am
SAN
-
SEA
Nonstop3h 12m
Hawaiian Airlines
Deal found 2/16$130
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:00 am
SEA
-
SAN
2 stops8h 40m
Southwest
Wed 3/1810:45 am
SAN
-
SEA
Nonstop3h 05m
Southwest
Deal found 2/18$132
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:08 pm
SEA
-
SAN
1 stop16h 23m
Frontier
Thu 3/129:07 pm
SAN
-
SEA
1 stop20h 32m
Frontier
Deal found 2/16$133
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:01 pm
SEA
-
SAN
1 stop9h 20m
Frontier
Thu 4/166:25 am
SAN
-
SEA
1 stop8h 40m
Frontier
Deal found 2/20$135
This eDestinos deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:50 pm
SEA
-
SAN
Nonstop2h 49m
Multiple Airlines
Tue 4/287:15 am
SAN
-
SEA
1 stop26h 12m
Multiple Airlines
Deal found 2/16$136
This Alaska Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:50 pm
SEA
-
SAN
Nonstop2h 49m
Alaska Airlines
Wed 4/156:15 am
SAN
-
SEA
Nonstop3h 12m
Alaska Airlines
Deal found 2/19$137
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/239:36 pm
SEA
-
SAN
1 stop15h 37m
Frontier
Wed 4/112:00 pm
SAN
-
SEA
1 stop23h 37m
Frontier
Deal found 2/16$141
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/171:40 pm
GEG
-
SAN
1 stop4h 40m
Delta
Tue 3/243:40 pm
SAN
-
GEG
1 stop7h 10m
Delta
Deal found 2/17$157

Find flight deals from Washington to San Diego

Keep the following information in mind while searching for Washington to San Diego flight deals. Data was last updated February 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$121
(Kiwi.com)

One-way from

$59
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$278

Good round-trip deal

$178 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San Diego flights.
Search Deals
From Washington to San Diego
Search Deals
One-way flight from Washington to San Diego
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington to San Diego.
Search Deals
Price to beat on a one-way flight from Washington to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 2,558,603 searches. Data last updated February 20, 2026.
Use the filters below to find and compare flights from Washington to San Diego that are best for you.

Fly from

Washington

Fly to

San Diego

Route

Depart

Return

Price

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 5/7

6:30 am-11:15 am

1 stop4h 45m

San Diego

Wed 5/13

4:25 pm-11:35 pm

1 stop7h 10m

$137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 4/14

7:35 pm-10:29 pm

Nonstop2h 54m

San Diego

Fri 4/17

6:51 pm-10:05 pm

Nonstop3h 14m

$137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 4/23

9:40 am-2:55 pm

1 stop5h 15m

San Diego

Mon 4/27

6:55 pm-12:55 am

1 stop6h 00m

$137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 3/24

11:51 am-2:44 pm

Nonstop2h 53m

San Diego

Tue 3/24

7:30 pm-10:47 pm

Nonstop3h 17m

$137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 3/23

6:00 pm-11:05 pm

1 stop5h 05m

San Diego

Mon 3/30

7:30 pm-1:40 am

1 stop6h 10m

$137

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Tue 4/14

9:20 am-5:45 pm

2 stops8h 25m

San Diego

Thu 4/16

5:25 pm-10:35 pm

1 stop5h 10m

$142

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Sun 5/3

6:58 pm-11:59 pm

1 stop5h 01m

San Diego

Tue 5/5

1:35 pm-9:06 pm

1 stop7h 31m

$152

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Thu 5/7

4:42 pm-7:39 pm

Nonstop2h 57m

San Diego

Wed 5/13

10:47 am-4:51 pm

1 stop6h 04m

$157

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Mon 3/23

7:49 pm-10:38 pm

Nonstop2h 49m

San Diego

Tue 3/31

6:15 am-9:27 am

Nonstop3h 12m

$157

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Wed 4/15

7:05 am-2:52 pm

1 stop7h 47m

San Diego

Thu 4/16

6:15 am-9:27 am

Nonstop3h 12m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 60 results
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Best time to book a flight from Washington to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Washington 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 Washington to San Diego

What is the cheapest month to book a flight from State of Washington to San Diego?

Currently, June is the cheapest month in which you can book a flight from State of Washington to San Diego (average of $55). Flying from State of Washington to San Diego in November is currently the most expensive (average of $108). 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 WA to SAN?

Find hourly flight availability from Washington 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 February 20, 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 13% on flights from State of Washington to San Diego by exploring options for tickets at noon.

What is the cheapest day to fly from State of Washington to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Washington to San Diego. Price data was last updated on February 17, 2026.

Travelers seeking maximum savings on their State of Washington to San Diego flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from State of Washington to San Diego

Explore weekly flight availability from Washington 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 February 20, 2026.

The most flights from USWA to SAN are scheduled on a Wednesday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington 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 airport do you fly into for flights to San Diego from Washington?

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Washington. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

  • How popular is this State of Washington to San Diego flight route?

    Flights from Washington to San Diego have been viewed 35 times in the past calendar month.

  • How long is the flight from State of Washington to San Diego?

    There are many flights that can get you from State of Washington to San Diego in 2h 39m. Fly via Southwest, Delta, or Alaska Airlines to get the fastest option. The distance from State of Washington to San Diego is about 933 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to San Diego one-way?

    The cheapest airlines for a one-way flight from State of Washington to San Diego are Spirit Airlines ($41), Allegiant Air ($45), and Delta ($68).

  • What are the most popular routes from State of Washington to San Diego?

    The most popular route from State of Washington to San Diego is Seattle/Tacoma Intl - San Diego. You may also consider Portland - San Diego or Everett Paine Field - San Diego.

  • What are the most reliable airlines from State of Washington to San Diego?

    Before booking your flight to San Diego from State of Washington, check out the most reliable airlines to get you to your destination on time: SkyWest Airlines (100%), Alaska Airlines (82%), Air Tahiti Nui( 81%).

  • What are the cheapest flights from State of Washington to San Diego?

    On average you can expect to pay $369 for a flight from State of Washington to San Diego. The cheapest flight overall is $68 while the most popular route, (Seattle/Tacoma Intl - San Diego) is currently priced at $91.

  • Can I find deals for flights from Washington to San Diego that include hotel bookings?

    Yes. In addition to deals on Washington to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to San Diego.

  • Can I find deals for business class flights from Washington to San Diego?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to San Diego?

    Currently, June is the cheapest month in which you can book a flight from State of Washington to San Diego (average of $55). Flying from State of Washington to San Diego in November is currently the most expensive (average of $108). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Washington to San Diego

Discover the top 9 airlines that operate flights from Washington 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 2,558,603 searches. Data last updated February 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$70Average$153FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$82Average$124FlexibilityNo cancel feeOn-time88%
FrontierCheapest$88Average$213FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$104Average$321FlexibilityNo cancel feeOn-time85%
DeltaCheapest$116Average$280FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$137Average$383FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$155Average$283FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$165Average$382FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$284Average$450FlexibilityNo cancel feeOn-time69%

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