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$119+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAN
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 February or October, booked 65 days in advance, depart on a Wednesday or Tuesday 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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$252
(United Airlines)

One-way from

$119
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$447

Good round-trip deal

$335 or less

Good one-way deal

$159 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Diego flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Diego flights.
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From Washington, D.C. Dulles Intl to San Diego
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One-way flight from Washington, D.C. Dulles Intl to San Diego
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Highest demand for flights based on searches. 10% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Diego.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Diego.
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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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/25. 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 4/158:35 amIAD - SAN
1 stop8h 21mUnited Airlines
Tue 4/158:30 pmSAN - IAD
1 stop7h 36mUnited Airlines
Deal found 3/25$252
This Hawaiian Airlines deal was found by Cheapflights users on 3/26. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:30 amIAD - SAN
1 stop11h 04mHawaiian Airlines
Sat 5/174:44 pmSAN - IAD
1 stop10h 11mHawaiian Airlines
Deal found 3/26$256
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:50 pmIAD - SAN
1 stop7h 25mSouthwest
Wed 4/306:50 amSAN - IAD
1 stop8h 05mSouthwest
Deal found 3/26$257
This Trip.com deal was found by Cheapflights users on 3/25. 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.
Thu 4/175:30 pmIAD - SAN
Nonstop5h 49mMultiple Airlines
Wed 4/238:30 amSAN - IAD
Nonstop5h 08mMultiple Airlines
Deal found 3/25$262
This Alaska Airlines deal was found by Cheapflights users on 3/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/105:00 pmIAD - SAN
Nonstop5h 43mAlaska Airlines
Wed 5/2110:20 amSAN - IAD
Nonstop5h 05mAlaska Airlines
Deal found 3/26$267
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/28:01 amIAD - SAN
1 stop18h 57mFrontier
Sun 5/46:25 amSAN - IAD
1 stop21h 06mFrontier
Deal found 3/25$280
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2111:37 amIAD - SAN
1 stop8h 28mSun Country Air
Wed 4/236:05 pmSAN - IAD
1 stop14h 32mSun Country Air
Deal found 3/25$289
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:00 amIAD - SAN
1 stop7h 30mDelta
Fri 5/169:59 pmSAN - IAD
1 stop10h 46mDelta
Deal found 3/26$297

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 March 26, 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 4/15

8:35 am-1:56 pm

1 stop8h 21m

San Diego

Tue 4/15

8:30 pm-7:06 am

1 stop7h 36m

$252

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 5/13

6:30 am-2:34 pm

1 stop11h 04m

San Diego

Sat 5/17

4:44 pm-5:55 am

1 stop10h 11m

$256

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 4/26

5:50 pm-10:15 pm

1 stop7h 25m

San Diego

Wed 4/30

6:50 am-5:55 pm

1 stop8h 05m

$257

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Thu 4/17

5:30 pm-8:19 pm

Nonstop5h 49m

San Diego

Wed 4/23

8:30 am-4:38 pm

Nonstop5h 08m

$262

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 5/10

5:00 pm-7:43 pm

Nonstop5h 43m

San Diego

Wed 5/21

10:20 am-6:25 pm

Nonstop5h 05m

$267

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 5/2

8:01 am-11:58 pm

1 stop18h 57m

San Diego

Sun 5/4

6:25 am-6:31 am

1 stop21h 06m

$280

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Mon 4/21

11:37 am-5:05 pm

1 stop8h 28m

San Diego

Wed 4/23

6:05 pm-11:37 am

1 stop14h 32m

$289

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 5/9

6:00 am-10:30 am

1 stop7h 30m

San Diego

Fri 5/16

9:59 pm-11:45 am

1 stop10h 46m

$297

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 6/10

5:14 pm-7:48 pm

Nonstop5h 34m

$119

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 5/10

1:20 pm-6:51 pm

1 stop8h 31m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 18 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice 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.

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 smoother departure, use the Aerotrain to navigate between terminals at IAD, but allow extra time for long walks and escalators.

Read more about IADby Ramsey Qubein
SAN

Upon arrival at SAN, use the San Diego Flyer shuttle for a free ride to the Old Town Transit Center, running every 20-30 minutes.

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 March 21, 2025.

Booking 65 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 March 26, 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 41% 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 March 23, 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 March 26, 2025.

The most flights from IAD to SAN are scheduled on a Tuesday (9 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 March 26, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to San Diego, such as Southwest, Alaska Airlines and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,330 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 5 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.

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

    United Airlines, at $252, 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 38% 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 $119 on Alaska Airlines. Other airlines that offer cheap prices include United Airlines from $124 and Sun Country Air from $140 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 (87%), Qatar Airways (81%), United Airlines (81%).

  • 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 $128. While the most popular route (Washington, D.C. Dulles Intl - San Diego) can be booked for $232 on average our data indicates $793 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
El Cajon
Chula Vista
Lemon Grove
National City
Imperial Beach
La Mesa
Alpine
Poway
Santee
Coronado
Borrego Springs

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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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$110Average$273FlexibilityNo cancel feeOn-time65%
FrontierCheapest$150Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$154Average$308FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$236Average$354FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$258Average$433FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$271Average$486FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$291Average$497FlexibilityNo cancel feeOn-time85%
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