HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$126+ Cheap flights from San Jose (SJC) to Dulles Intl (IAD)

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — IAD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Jose to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from San Jose to Washington, D.C. Dulles Intl are usually found in April or June, booked 42 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from San Jose to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Jose (SJC) to Dulles Intl (IAD). 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 September 17, 2025.

Round-trip from

$241
(American Airlines)

One-way from

$126
(United Airlines)

Popular in

December

Cheapest in

April

Average price

$357
From San Jose to Washington, D.C. Dulles Intl
Search Deals
One-way flight from San Jose to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from San Jose to Dulles Intl

Cheapest flights from San Jose to Dulles Intl
Explore the most affordable flight options available from San Jose to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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 11/156:00 amSJC - IAD
1 stop7h 11mAmerican Airlines
Wed 11/196:04 amIAD - SJC
1 stop10h 14mAmerican Airlines
Deal found 9/15$241
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:05 amSJC - IAD
1 stop6h 50mSouthwest
Fri 10/315:40 amIAD - SJC
1 stop7h 10mSouthwest
Deal found 9/16$244
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/186:00 amSJC - IAD
1 stop7h 47mAmerican Airlines
Sat 10/256:34 amIAD - SJC
2 stops13h 19mAmerican Airlines
Deal found 9/15$246
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:30 amSJC - IAD
2 stops8h 55mSouthwest
Tue 11/45:45 pmIAD - SJC
1 stop7h 40mSouthwest
Deal found 9/16$249
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 10/712:38 pmSJC - IAD
1 stop8h 45mAlaska Airlines
Wed 10/156:25 amIAD - SJC
1 stop11h 25mAlaska Airlines
Deal found 9/15$250
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/186:30 amSJC - IAD
1 stop8h 07mUnited Airlines
Sat 10/252:45 pmIAD - SJC
1 stop9h 09mUnited Airlines
Deal found 9/15$251
This Southwest deal was found by Cheapflights users on 9/15. 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 10/298:05 amSJC - IAD
2 stops12h 00mSouthwest
Sat 11/15:00 pmIAD - SJC
1 stop7h 30mSouthwest
Deal found 9/15$256
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:00 amSJC - IAD
1 stop7h 13mAlaska Airlines
Sat 11/15:40 pmIAD - SJC
1 stop7h 57mAlaska Airlines
Deal found 9/17$258
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:00 amSJC - IAD
1 stop7h 30mAlaska Airlines
Tue 12/97:35 amIAD - SJC
1 stop9h 15mAlaska Airlines
Deal found 9/17$263

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Jose to Dulles Intl 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 September 17, 2025.
Use the filters below to find and compare flights from San Jose to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

San Jose

Fly to

Dulles Intl

Route

Depart

Return

Price

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Sat 10/25

8:45 am-7:23 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

Sat 11/8

3:59 pm-8:53 pm

1 stop7h 54m

$251

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Tue 12/2

7:00 am-5:30 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Wed 12/10

7:35 am-1:50 pm

1 stop9h 15m

$263

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Fri 10/17

6:22 pm-5:22 am

1 stop8h 00m

Washington, D.C. Dulles Intl

Sat 10/25

2:45 pm-8:54 pm

1 stop9h 09m

$274

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Fri 10/31

1:15 pm-11:33 pm

1 stop7h 18m

Washington, D.C. Dulles Intl

Tue 11/4

7:35 am-3:57 pm

1 stop11h 22m

$277

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Tue 10/28

1:20 pm-11:39 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Fri 10/31

7:35 am-3:57 pm

1 stop11h 22m

$277

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Sat 12/6

11:40 am-12:26 am

1 stop9h 46m

Washington, D.C. Dulles Intl

Tue 1/6

6:10 am-2:57 pm

2 stops11h 47m

$282

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Tue 12/2

8:25 pm-11:18 am

2 stops11h 53m

Washington, D.C. Dulles Intl

Tue 1/6

6:10 am-2:57 pm

2 stops11h 47m

$287

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Thu 11/6

7:00 am-5:13 pm

1 stop7h 13m

Washington, D.C. Dulles Intl

Thu 11/13

5:40 pm-10:37 pm

1 stop7h 57m

$296

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Thu 11/27

6:15 am-5:34 pm

1 stop8h 19m

Washington, D.C. Dulles Intl

Thu 12/4

5:37 pm-10:42 pm

1 stop8h 05m

$306

San JoseWashington, D.C.

SJC - IAD

SJCIAD

San Jose

Tue 12/2

7:00 am-5:30 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Mon 1/5

7:33 am-1:52 pm

1 stop9h 19m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 21 results
1
2
3

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Jose to Dulles Intl. Price data was last updated on September 12, 2025.

The price you pay for your flight from San Jose to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Jose to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from San Jose to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Jose to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 SJC to IAD?

Find hourly flight availability from San Jose to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 15% on flights from San Jose to Washington, D.C. Dulles Intl Airport by exploring options for tickets at noon.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated September 17, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from San Jose to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from San Jose to Dulles Intl. 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 from for flights from San Jose to Washington, D.C. Dulles Intl?

    San Jose (SJC), located 2.9 mi from the city center, is the airport you fly out of when you book flights from San Jose to Washington, D.C. Dulles Intl. 5 airlines have flights from San Jose to Washington, D.C. Dulles Intl on a regular basis. Booking flights from San Jose to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.

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

    Departing from San Jose to Washington, D.C. Dulles Intl Airport will take you 7h 25m. The distance from San Jose to Washington, D.C. Dulles Intl Airport is about 2393 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $220. Additional round-trip tickets that might be worth considering are offered by Southwest and Alaska Airlines, with the lowest prices starting at $258 and $264, respectively. Frontier is currently priced 45% below the average price you’ll pay for this route.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from San Jose to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Jose to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Jose to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
San Francisco to Baltimore flights
San Francisco to Reagan-National flights
Los Angeles to Baltimore flights
San Francisco to Dulles Intl flights
San Diego to Dulles Intl flights
Burbank to Baltimore flights
Ontario to Dulles Intl flights
San Diego to Reagan-National flights
Ontario to Reagan-National flights
Ontario to Baltimore flights
Santa Ana to Baltimore flights
San Diego to Baltimore flights
Santa Ana to Reagan-National flights
Sacramento to Dulles Intl flights
Oakland to Baltimore flights
Santa Ana to Dulles Intl flights
Oakland to Dulles Intl flights
San Jose to Reagan-National flights
Sacramento to Baltimore flights
San Jose to Baltimore flights
Oakland to Reagan-National flights
Sacramento to Reagan-National flights
Las Vegas to Baltimore flights
Las Vegas to Dulles Intl flights
Las Vegas to Reagan-National flights
Burbank to Reagan-National flights
Burbank to Dulles Intl flights
Fresno to Dulles Intl flights
Reno to Dulles Intl flights
Reno to Reagan-National flights
Fresno to Baltimore flights
Fresno to Reagan-National flights
Reno to Baltimore flights
Palm Springs to Reagan-National flights
San Luis Obispo to Dulles Intl flights
Palm Springs to Dulles Intl flights
Long Beach to Dulles Intl flights
Monterey to Dulles Intl flights
Long Beach to Baltimore flights
Monterey to Reagan-National flights
Santa Barbara to Dulles Intl flights
Palm Springs to Baltimore flights
Santa Barbara to Reagan-National flights
Monterey to Baltimore flights
Long Beach to Reagan-National flights
Santa Rosa to Dulles Intl flights
San Luis Obispo to Reagan-National flights

Top 5 airlines flying from San Jose to Dulles Intl

Discover the top 5 airlines that operate flights from San Jose to Dulles Intl. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$220Average$293FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$258Average$433FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$264Average$378FlexibilityNo cancel feeOn-time75%
DeltaCheapest$276Average$360FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$276Average$417FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights