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$138+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAN
Feb 24 — Mar 31
Tue 2/24
Tue 3/3
1 adult, Economy
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Find cheap flights from Dulles Intl to San Diego with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Diego are usually found in August or October, booked 48 days in advance, depart on a Wednesday or Thursday 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 January 25, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/22. 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.
Wed 2/186:20 pm
IAD
-
SAN
Nonstop5h 59m
Alaska Airlines
Wed 2/258:26 pm
SAN
-
IAD
1 stop30h 14m
Alaska Airlines
Deal found 1/22$242
This United Airlines deal was found by Cheapflights users on 1/23. 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.
Sat 3/149:00 am
IAD
-
SAN
Nonstop5h 50m
United Airlines
Tue 3/171:05 pm
SAN
-
IAD
Nonstop4h 51m
United Airlines
Deal found 1/23$243
This Kiwi.com deal was found by Cheapflights users on 1/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:52 pm
IAD
-
SAN
1 stop16h 58m
Frontier
Sat 3/76:25 am
SAN
-
IAD
2 stops38h 06m
Frontier
Deal found 1/23$244
This United Airlines deal was found by Cheapflights users on 1/23. 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.
Thu 3/126:15 am
IAD
-
SAN
1 stop8h 23m
United Airlines
Tue 3/1710:15 pm
SAN
-
IAD
Nonstop4h 48m
United Airlines
Deal found 1/23$246
This CheapOair deal was found by Cheapflights users on 1/24. 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.
Wed 3/117:05 am
IAD
-
SAN
1 stop11h 41m
Alaska Airlines
Sat 3/149:28 am
SAN
-
IAD
Nonstop4h 59m
Alaska Airlines
Deal found 1/24$247
This Kiwi.com deal was found by Cheapflights users on 1/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:23 am
IAD
-
SAN
1 stop27h 03m
Frontier
Fri 2/279:45 am
SAN
-
IAD
2 stops20h 49m
Frontier
Deal found 1/23$251
This United Airlines deal was found by Cheapflights users on 1/23. 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 2/255:54 pm
IAD
-
SAN
Nonstop5h 52m
United Airlines
Sat 3/72:11 pm
SAN
-
IAD
1 stop6h 48m
United Airlines
Deal found 1/23$253
This United Airlines deal was found by Cheapflights users on 1/24. 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 2/2512:49 pm
IAD
-
SAN
Nonstop5h 52m
United Airlines
Sun 3/110:15 pm
SAN
-
IAD
Nonstop4h 49m
United Airlines
Deal found 1/24$254
This American Airlines deal was found by Cheapflights users on 1/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:11 pm
IAD
-
SAN
1 stop8h 45m
American Airlines
Sun 3/19:57 pm
SAN
-
IAD
1 stop7h 51m
American Airlines
Deal found 1/23$256
This Delta deal was found by Cheapflights users on 1/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/215:25 pm
IAD
-
SAN
1 stop8h 44m
Delta
Tue 3/2410:30 pm
SAN
-
IAD
1 stop7h 40m
Delta
Deal found 1/23$257
This Frontier deal was found by Cheapflights users on 1/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:04 pm
IAD
-
SAN
1 stop8h 07m
Frontier
Mon 4/206:55 am
SAN
-
IAD
1 stop8h 24m
Frontier
Deal found 1/23$259
This Southwest deal was found by Cheapflights users on 1/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/194:40 pm
IAD
-
SAN
1 stop7h 30m
Southwest
Wed 2/2510:30 am
SAN
-
IAD
2 stops8h 25m
Southwest
Deal found 1/23$261

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 January 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$242
(Alaska Airlines)

One-way from

$138
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$397

Good round-trip deal

$303 or less

Good one-way deal

$198 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. 4% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 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

Dulles Intl

Fly to

San Diego

Route

Depart

Return

Price

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 2/18

6:20 pm-9:19 pm

Nonstop5h 59m

San Diego

Wed 2/25

8:26 pm-5:40 am

1 stop30h 14m

$242

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 3/4

5:54 pm-8:46 pm

Nonstop5h 52m

San Diego

Sat 3/7

2:11 pm-11:59 pm

1 stop6h 48m

$253

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 3/4

7:30 am-2:29 pm

1 stop9h 59m

San Diego

Wed 3/4

10:20 pm-9:13 am

1 stop7h 53m

$257

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Fri 4/17

3:00 pm-8:47 pm

1 stop8h 47m

San Diego

Wed 4/22

9:45 pm-9:15 am

1 stop8h 30m

$276

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sun 3/8

7:05 am-4:46 pm

1 stop12h 41m

San Diego

Wed 3/11

9:28 am-5:27 pm

Nonstop4h 59m

$286

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Mon 2/9

12:23 pm-12:05 am

1 stop14h 42m

San Diego

Tue 2/17

10:20 pm-9:13 am

1 stop7h 53m

$290

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Thu 3/12

5:50 am-10:05 am

1 stop7h 15m

San Diego

Mon 3/16

9:50 am-7:05 pm

1 stop6h 15m

$295

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Wed 4/15

9:55 am-2:57 pm

1 stop8h 02m

San Diego

Sun 4/19

7:14 pm-5:28 am

1 stop7h 14m

$302

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Sat 3/21

7:00 am-2:44 pm

1 stop10h 44m

San Diego

Mon 4/6

10:30 pm-9:10 am

1 stop7h 40m

$308

Washington, D.C.San Diego

IAD - SAN

IADSAN

Washington, D.C. Dulles Intl

Tue 4/7

5:55 pm-8:46 pm

Nonstop5h 51m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 21 results
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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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?

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 January 23, 2026.

Booking 48 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 $111). Flying from Washington, D.C. Dulles Intl Airport to San Diego in December is currently the most expensive (average of $289). 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 January 25, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to San Diego as you normally would.

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 January 25, 2026.
Read reviews from past customers who have flown Alaska Airlines, Hawaiian Airlines, and United 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
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,787 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Hawaiian Airlines
7.8
Good
2,829 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,200 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,197 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Frontier
5.7
Fair
3,059 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 7 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 $253, Alaska Airlines can have you in San Diego from Washington, D.C. Dulles Intl Airport in 5h 52m. 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 $118, 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 Frontier and Delta. Hawaiian Airlines is currently priced 70% 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 $103 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $118 and Hawaiian Airlines from $118 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: Brussels Airlines (88%), Austrian Airlines (88%), United Airlines (83%).

  • 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 $148. While the most popular route (Washington, D.C. Dulles Intl - San Diego) can be booked for $197 on average, our data indicates $874 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 $111). Flying from Washington, D.C. Dulles Intl Airport to San Diego in December is currently the most expensive (average of $289). 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

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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 January 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$325FlexibilityNo cancel feeOn-time85%
FrontierCheapest$144Average$286FlexibilityNo cancel feeOn-time62%
DeltaCheapest$148Average$366FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$217Average$436FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$218Average$348FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$234Average$467FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$245Average$427FlexibilityNo cancel feeOn-time69%

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