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$212+ Cheap flights from Dulles Intl (IAD) 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAN
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Diego are usually found in January or October, booked 60 days in advance, depart on a Wednesday or Saturday and return on a Friday

Cheap flight deals from Dulles Intl to San Diego

Cheapest flights from Dulles Intl to San Diego
Explore the most affordable flight options available from Dulles Intl to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Wed 8/198:59 am
IAD
-
SAN
2 stops27h 06m
Frontier
Sat 8/224:36 pm
SAN
-
IAD
1 stop22h 53m
Frontier
Deal found 7/21$343
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/169:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Fri 8/214:36 pm
SAN
-
IAD
1 stop22h 53m
Frontier
Deal found 7/20$344
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Fri 8/149:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Fri 8/214:36 pm
SAN
-
IAD
1 stop22h 53m
Frontier
Deal found 7/20$345
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Thu 8/139:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Tue 8/184:36 pm
SAN
-
IAD
2 stops21h 38m
Frontier
Deal found 7/20$346
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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.
Thu 9/107:47 pm
IAD
-
SAN
Nonstop5h 24m
Alaska Airlines
Sat 9/1910:04 am
SAN
-
IAD
Nonstop5h 10m
Alaska Airlines
Deal found 7/22$347
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Tue 8/119:38 pm
IAD
-
SAN
1 stop24h 22m
Frontier
Fri 8/218:59 pm
SAN
-
IAD
1 stop8h 05m
Frontier
Deal found 7/20$349
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/169:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Sat 8/224:36 pm
SAN
-
IAD
1 stop22h 53m
Frontier
Deal found 7/20$350
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Fri 8/79:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Mon 8/108:51 pm
SAN
-
IAD
1 stop8h 29m
Frontier
Deal found 7/20$351
This United Airlines deal was found by Cheapflights users on 7/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:39 pm
IAD
-
SAN
Nonstop5h 43m
United Airlines
Tue 11/249:45 pm
SAN
-
IAD
Nonstop4h 42m
United Airlines
Deal found 7/23$352
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Mon 8/179:50 am
IAD
-
SAN
1 stop13h 16m
Frontier
Thu 8/208:59 pm
SAN
-
IAD
1 stop8h 05m
Frontier
Deal found 7/20$353

Find flight deals from Dulles Intl to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$343
(Kiwi.com)

One-way from

$212
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$479

Good round-trip deal

$398 or less

Good one-way deal

$227 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Diego flights.
Search Deals
From Washington, D.C. Dulles Intl to San Diego
Search Deals
One-way flight from Washington, D.C. Dulles Intl to San Diego
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Diego.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 July 25, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 9/19

5:15 pm-10:10 pm

1 stop7h 55m

San Diego

Sun 9/27

9:45 pm-5:41 am

Nonstop4h 56m

$357

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 8/16

12:35 pm-2:57 pm

Nonstop5h 22m

San Diego

Sat 8/22

10:40 pm-9:28 am

1 stop7h 48m

$377
Quickest round-trip

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 10/23

12:35 pm-2:57 pm

Nonstop5h 22m

San Diego

Mon 10/26

9:45 pm-5:27 am

Nonstop4h 42m

$387

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 9/18

6:00 pm-8:29 pm

Nonstop5h 29m

San Diego

Thu 9/24

9:45 pm-5:41 am

Nonstop4h 56m

$397

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Thu 9/3

5:25 pm-10:16 pm

1 stop7h 51m

San Diego

Sun 9/6

6:15 am-4:42 pm

1 stop7h 27m

$422

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 9/15

7:47 pm-10:11 pm

Nonstop5h 24m

San Diego

Sun 9/20

10:04 am-6:14 pm

Nonstop5h 10m

$422

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 10/4

7:24 pm-9:53 pm

Nonstop5h 29m

San Diego

Thu 10/8

9:46 am-5:50 pm

Nonstop5h 04m

$427

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 8/30

8:55 am-11:17 am

Nonstop5h 22m

San Diego

Thu 9/3

8:00 am-4:02 pm

Nonstop5h 02m

$427

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 8/19

6:00 pm-8:29 pm

Nonstop5h 29m

San Diego

Tue 8/25

8:00 am-4:02 pm

Nonstop5h 02m

$432

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 10/23

3:36 pm-8:08 pm

1 stop7h 32m

San Diego

Sun 11/1

2:30 pm-12:36 am

1 stop7h 06m

$433

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Dulles Intl to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to San Diego in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Dulles Intl 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, D.C. Dulles Intl Airport to San Diego

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Diego?

Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport to San Diego?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Diego (average of $367). Flying from Washington, D.C. Dulles Intl Airport to San Diego in June is currently the most expensive (average of $552). 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 IAD to SAN?

Find hourly flight availability from Dulles Intl 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 July 25, 2026.

When flying from Washington, D.C. Dulles Intl Airport to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 34% versus a flight at noon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to San Diego. Price data was last updated on July 18, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Diego flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday 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 Washington, D.C. Dulles Intl Airport to San Diego?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to San Diego flights typically cost between $378 and $548 in August.
The cheapest round-trip price found within the last 5 days was $343 on Frontier (Aug 19-Aug 22).

The best insider tips for Washington, D.C. Dulles Intl Airport to San Diego flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Diego trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 July 25, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andHawaiian Airlines from Washington, D.C. Dulles Intl Airport 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
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Alaska Airlines
7.9
Good
12,712 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Delta
7.8
Good
8,488 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Hawaiian Airlines
7.8
Good
2,821 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
United Airlines
7.4
Good
10,034 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
American Airlines
7.1
Good
11,848 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to San Diego, you will be flying into San Diego. San Diego (SAN) is just 2.6 mi from the center of the city. San Diego is the only San Diego airport and it handles 9 inbound flights from Washington, D.C. Dulles Intl per day. 7 airlines have flights to San Diego from Washington, D.C. Dulles Intl on a regular basis.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San Diego?

    For as low as $422, United Airlines can have you in San Diego from Washington, D.C. Dulles Intl Airport in 7h 51m. Airlines will cover a distance of 2248 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Diego round-trip?

    Hawaiian Airlines, at $108, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to San Diego.Alternate airlines to your destination round-trip include Delta and Frontier. Hawaiian Airlines is currently priced 74% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Diego one-way?

    One-way options have recently been found by users for as low as $117 on Frontier. Other airlines that offer cheap prices include Southwest from $128 and Delta from $138 one-way.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to San Diego on time: United Airlines (83%), Ethiopian Air (80%), Austrian Airlines (78%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Diego?

    Looking at all options, your cheapest flight can be booked for $173. While the most popular route (Washington, D.C. Dulles Intl - San Diego) can be booked for $265 on average, our data indicates $1,029 when flying from Washington, D.C. Dulles Intl Airport to San Diego.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to San Diego?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Diego (average of $367). Flying from Washington, D.C. Dulles Intl Airport to San Diego in June is currently the most expensive (average of $552). 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
National City
Chula Vista
Poway
La Mesa
Coronado
Santee
San Ysidro
Julian
Lemon Grove

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Alternative routes for Dulles Intl to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Dulles Intl to San Diego

Discover the top 7 airlines that operate flights from Dulles Intl 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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$108Average$307FlexibilityNo cancel feeOn-time85%
DeltaCheapest$147Average$406FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$148Average$290FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$217Average$381FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$255Average$477FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$464FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$256Average$375FlexibilityNo cancel feeOn-time63%

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