San Diego

$139+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAN
Aug 3 — Aug 101
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Diego are usually found in September or October, booked 69 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap 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 29, 2025.

Round-trip from

$243
(United Airlines)

One-way from

$139
(Delta)

Popular in

December

Cheapest in

September

Average price

$417

Good round-trip deal

$307 or less

Good one-way deal

$188 or less
From Washington, D.C. Dulles Intl to San Diego
One-way flight from Washington, D.C. Dulles Intl to San Diego
Highest demand for flights based on searches. 10% potential increase in price ($46 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Diego.
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Diego.

Find 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 29, 2025.

This United Airlines deal was found by Cheapflights users on 7/26. 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.
Tue 8/2612:35 pmIAD - SAN
1 stop8h 48mUnited Airlines
Tue 9/29:45 pmSAN - IAD
Nonstop4h 58mUnited Airlines
Deal found 7/26$243
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Wed 9/107:00 amIAD - SAN
1 stop10h 48mMultiple Airlines
Sat 9/135:30 pmSAN - IAD
1 stop11h 03mMultiple Airlines
Deal found 7/28$248
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/145:52 pmIAD - SAN
Nonstop5h 27mHawaiian Airlines
Sat 9/278:33 amSAN - IAD
Nonstop5h 19mHawaiian Airlines
Deal found 7/27$251
This lastminute.com deal was found by Cheapflights users on 7/27. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:00 amIAD - SAN
1 stop10h 34mAlaska Airlines
Fri 9/265:30 pmSAN - IAD
1 stop11h 03mAlaska Airlines
Deal found 7/27$254
This Southwest deal was found by Cheapflights users on 7/28. 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.
Sat 8/235:05 pmIAD - SAN
1 stop7h 30mSouthwest
Sat 8/3011:55 amSAN - IAD
1 stop7h 55mSouthwest
Deal found 7/28$257
This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/297:30 amIAD - SAN
1 stop13h 49mFrontier
Sat 8/97:06 pmSAN - IAD
1 stop8h 28mFrontier
Deal found 7/27$258
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:44 amIAD - SAN
2 stops10h 52mAmerican Airlines
Sun 11/1610:02 pmSAN - IAD
1 stop9h 17mAmerican Airlines
Deal found 7/27$322

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 29, 2025.
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

Dulles Intl

Fly to

San Diego

Route

Depart

Return

Price

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 8/26

12:35 pm-6:23 pm

1 stop8h 48m

San Diego

Tue 9/2

9:45 pm-5:43 am

Nonstop4h 58m

$243

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 9/10

7:00 am-2:48 pm

1 stop10h 48m

San Diego

Sat 9/13

5:30 pm-7:33 am

1 stop11h 03m

$248

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 9/14

5:52 pm-8:19 pm

Nonstop5h 27m

San Diego

Sat 9/27

8:33 am-4:52 pm

Nonstop5h 19m

$251

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 9/16

9:00 am-4:34 pm

1 stop10h 34m

San Diego

Fri 9/26

5:30 pm-7:33 am

1 stop11h 03m

$254

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 8/23

5:05 pm-9:35 pm

1 stop7h 30m

San Diego

Sat 8/30

11:55 am-10:50 pm

1 stop7h 55m

$257

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 8/9

12:27 pm-10:54 pm

1 stop13h 27m

San Diego

Tue 8/12

7:04 pm-6:34 am

1 stop8h 30m

$258

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 11/8

6:44 am-2:36 pm

2 stops10h 52m

San Diego

Sun 11/16

10:02 pm-10:19 am

1 stop9h 17m

$322

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 8/17

6:00 am-10:08 am

1 stop7h 08m

San Diego

Sun 8/31

6:25 am-4:30 pm

1 stop7h 05m

$337

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 8/27

3:26 pm-9:15 pm

1 stop8h 49m

$139

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 8/3

7:30 am-12:04 pm

1 stop7h 34m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 17 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to San Diego flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Diego trip
Airports
IAD

For a smooth departure from IAD, use the Aerotrain to quickly reach your concourse. Pay attention to signage for correct train direction.

Read more about IADby Ramsey Qubein
SAN

Upon arrival at SAN, consider using the San Diego Flyer shuttle for a free ride to the Old Town Transit Center.

Read more about SANby Blane Bachelor
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

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

Ramsey Qubein

Ramsey Qubein

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

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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to San Diego. Price data was last updated on July 25, 2025.

Booking 69 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Diego (average of $286). Flying from Washington, D.C. Dulles Intl Airport to San Diego in March is currently the most expensive (average of $366). 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 29, 2025.

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 evening, which can drop the price by up to 42% 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 27, 2025.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Diego flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to San Diego

Explore weekly flight availability from Dulles Intl 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 July 29, 2025.

The most flights from IAD to SAN are scheduled on a Saturday (11 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (9 on average).

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 29, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
8.0
Very good

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 10 inbound flights from Washington, D.C. Dulles Intl per day. 8 airlines have flights to San Diego from Washington, D.C. Dulles Intl on a regular basis.

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

    United Airlines, at $243, 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 Hawaiian Airlines and Alaska Airlines. United Airlines is currently priced 40% 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 $139 on Delta. Other airlines that offer cheap prices include Frontier from $140 and Hawaiian Airlines from $148 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: Ethiopian Air (80%), United Airlines (76%), Qatar Airways (69%).

  • 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 $138. While the most popular route (Washington, D.C. Dulles Intl - San Diego) can be booked for $233 on average our data indicates $730 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Diego (average of $286). Flying from Washington, D.C. Dulles Intl Airport to San Diego in March is currently the most expensive (average of $366). 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
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Chula Vista
Coronado
Poway
National City
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Imperial Beach
La Mesa
Alpine
Santee

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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.

Top 8 airlines flying from Dulles Intl to San Diego

Discover the top 8 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$110Average$238FlexibilityNo cancel feeOn-time65%
FrontierCheapest$145Average$288FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$188Average$351FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$236Average$347FlexibilityNo cancel feeOn-time75%
DeltaCheapest$256Average$316FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$256Average$475FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$257Average$452FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$276Average$436FlexibilityNo cancel feeOn-time63%

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