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Dulles Intl

$201+ Cheap flights from San José (SJO) 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — IAD
Jul 11 — Jul 181
Sat 7/11
Sat 7/18
1 adult, Economy
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Find cheap flights from San José to Dulles Intl with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from San José Juan Santamaria Intl to Washington, D.C. Dulles Intl are usually found in November or October, booked 58 days in advance, depart on a Thursday or Tuesday and return on a Thursday

Cheap flight deals from San José to Dulles Intl

Cheapest flights from San José to Dulles Intl
Explore the most affordable flight options available from San José to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.

This KAYAK deal was found by Cheapflights users on 6/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2312:44 pm
SJO
-
IAD
1 stop8h 15m
Multiple Airlines
Sun 11/110:10 pm
IAD
-
SJO
1 stop14h 15m
Multiple Airlines
Deal found 6/10$330
This Avianca deal was found by Cheapflights users on 6/9. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:05 am
SJO
-
IAD
1 stop8h 50m
Avianca
Fri 7/35:35 pm
IAD
-
SJO
1 stop8h 05m
Avianca
Deal found 6/9$331
This Avianca deal was found by Cheapflights users on 6/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:25 pm
SJO
-
IAD
1 stop6h 50m
Avianca
Sat 10/35:45 am
IAD
-
SJO
1 stop7h 45m
Avianca
Deal found 6/10$333
This Avianca deal was found by Cheapflights users on 6/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:10 pm
SJO
-
IAD
1 stop11h 10m
Avianca
Sat 10/35:45 am
IAD
-
SJO
1 stop7h 45m
Avianca
Deal found 6/10$334
This Avianca deal was found by Cheapflights users on 6/11. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:25 pm
SJO
-
IAD
1 stop6h 50m
Avianca
Sat 10/311:30 am
IAD
-
SJO
1 stop9h 05m
Avianca
Deal found 6/11$338
This Avianca deal was found by Cheapflights users on 6/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/113:10 pm
SJO
-
IAD
1 stop9h 35m
Avianca
Mon 9/143:40 am
IAD
-
SJO
1 stop6h 50m
Avianca
Deal found 6/10$339
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 8/27:15 am
SJO
-
IAD
1 stop14h 04m
United Airlines
Tue 8/1810:29 pm
IAD
-
SJO
1 stop23h 08m
United Airlines
Deal found 6/10$340
This Avianca deal was found by Cheapflights users on 6/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:05 am
SJO
-
IAD
1 stop8h 50m
Avianca
Tue 6/234:10 am
IAD
-
SJO
1 stop9h 20m
Avianca
Deal found 6/10$341
This United Airlines deal was found by Cheapflights users on 6/8. 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 9/151:25 pm
SJO
-
IAD
1 stop8h 30m
United Airlines
Tue 9/2212:45 pm
IAD
-
SJO
1 stop8h 52m
United Airlines
Deal found 6/8$343
This United Airlines deal was found by Cheapflights users on 6/8. 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 10/271:00 pm
SJO
-
IAD
1 stop16h 19m
United Airlines
Sat 11/78:57 am
IAD
-
SJO
Nonstop4h 58m
United Airlines
Deal found 6/8$348
This Avianca deal was found by Cheapflights users on 6/8. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:25 pm
SJO
-
IAD
1 stop6h 50m
Avianca
Tue 10/272:30 am
IAD
-
SJO
1 stop8h 05m
Avianca
Deal found 6/8$349
This Avianca deal was found by Cheapflights users on 6/9. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/164:35 pm
SJO
-
IAD
1 stop7h 40m
Avianca
Mon 7/205:35 pm
IAD
-
SJO
1 stop8h 05m
Avianca
Deal found 6/9$350

Find flight deals from San José to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San José (SJO) 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 June 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$330
(KAYAK)

One-way from

$201
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$355
Provider with most accurate pricing for San José Juan Santamaria Intl-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Washington, D.C. Dulles Intl flights.
Search Deals
From San José Juan Santamaria Intl to Washington, D.C. Dulles Intl
Search Deals
One-way flight from San José Juan Santamaria Intl to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San José 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 June 11, 2026.
Use the filters below to find and compare flights from San José to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Wed 10/21

5:55 pm-4:20 am

1 stop8h 25m

Washington, D.C. Dulles Intl

Mon 11/9

1:16 am-12:20 pm

1 stop12h 04m

$340

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Tue 9/8

7:55 am-11:55 pm

1 stop14h 00m

Washington, D.C. Dulles Intl

Wed 9/16

6:42 am-7:15 am

1 stop26h 33m

$340

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sat 10/24

5:55 pm-4:20 am

1 stop8h 25m

Washington, D.C. Dulles Intl

Mon 11/9

1:16 am-1:42 pm

1 stop13h 26m

$340

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Wed 9/23

1:25 pm-12:32 am

1 stop9h 07m

Washington, D.C. Dulles Intl

Mon 9/28

6:00 am-11:54 am

1 stop7h 54m

$343

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Tue 7/7

12:44 pm-11:19 pm

1 stop8h 35m

Washington, D.C. Dulles Intl

Sat 7/18

10:21 pm-7:15 am

1 stop34h 54m

$343
Quickest round-trip

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Wed 7/29

2:49 pm-1:47 am

1 stop8h 58m

Washington, D.C. Dulles Intl

Thu 8/6

2:25 am-8:19 am

1 stop7h 54m

$408

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sun 7/5

7:15 am-11:19 pm

1 stop14h 04m

Washington, D.C. Dulles Intl

Tue 7/7

10:20 pm-10:11 am

1 stop13h 51m

$503

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Fri 8/21

4:08 am-12:33 am

1 stop18h 25m

Washington, D.C. Dulles Intl

Sat 9/5

4:34 pm-7:10 am

1 stop16h 36m

$533

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Fri 7/3

10:03 am-4:21 am

1 stop16h 18m

Washington, D.C. Dulles Intl

Thu 7/9

2:22 am-9:06 am

1 stop8h 44m

$541

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Tue 11/10

1:43 am-5:51 am

3 stops27h 08m

Washington, D.C. Dulles Intl

Sat 11/14

5:14 pm-11:08 pm

3 stops30h 54m

$835

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from San José to Dulles Intl

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 San José to Dulles Intl in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust 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 San José-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San José-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San José-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San José-Washington, D.C. Dulles Intl Airport 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 San José-Washington, D.C. Dulles Intl Airport 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 San José to Dulles Intl

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

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

Booking 57 days in advance of your planned departure date is, on average, the best time to get cheap flights from San José to Washington, D.C. Dulles Intl Airport. 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 San José to Washington, D.C. Dulles Intl Airport?

Currently, November is the cheapest month in which you can book a flight from San José to Washington, D.C. Dulles Intl Airport (average of $254). Flying from San José to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $384). 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 SJO to IAD?

Find hourly flight availability from San José 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 June 11, 2026.

When flying from San José to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from San José to Washington, D.C. Dulles Intl Airport?

The best insider tips for San José to Washington, D.C. Dulles Intl Airport 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 San José to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on SJO

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

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 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 June 11, 2026.
Peruse reviews from past customers who have flown with Copa Airlines,United Airlines, andAvianca from San José to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Copa Airlines
7.5
Good
1,569 reviews

Food

6.9

Crew

8.1

Comfort

7.4

Entertainment

6.8

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2026

LIM - PTY

Fast boarding, polite and helpful staff. Lowest cost across all airlines
Copa Airlines
7.5
Good
1,569 reviews
Copa Airlines
7.5
Good
1,569 reviews

Food

6.9

Crew

8.1

Comfort

7.4

Entertainment

6.8

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2026

LIM - PTY

Fast boarding, polite and helpful staff. Lowest cost across all airlines
United Airlines
7.4
Good
9,804 reviews
Copa Airlines
7.5
Good
1,569 reviews

Food

6.9

Crew

8.1

Comfort

7.4

Entertainment

6.8

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2026

LIM - PTY

Fast boarding, polite and helpful staff. Lowest cost across all airlines
Avianca
6.5
Okay
2,535 reviews
Copa Airlines
7.5
Good
1,569 reviews

Food

6.9

Crew

8.1

Comfort

7.4

Entertainment

6.8

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2026

LIM - PTY

Fast boarding, polite and helpful staff. Lowest cost across all airlines

Related info for your journey

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

    Most people fly from San José Juan Santamaria Intl (SJO) if they book a flight from San José to Washington, D.C. Dulles Intl. On average, Juan Santamaria Intl has 0 outbound flights to Washington, D.C. Dulles Intl per day from 3 airlines. San José Juan Santamaria Intl is conveniently located just 8.8 mi from San José’s city center.

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

    Airlines like United Airlines and Delta fly from San José to Washington, D.C. Dulles Intl Airport in about 9h 07m. The time it takes to get you to your destination can typically vary by up to 4h 53m. There are 2042 mi between San José and Washington, D.C. Dulles Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from San José to Washington, D.C. Dulles Intl Airport round-trip from $201. Other airlines that can offer you cheap pricing are United Airlines, from $216, and Copa Airlines, from $277. Avianca is currently priced 37% below the average price you’ll pay for this route.

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

    For one-way options, check prices for Avianca. According to our data, you can fly for as low as $130. Users have also found prices from $136 and $136 on American Airlines and United Airlines, respectively.

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

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

  • How can I find direct flights from San José 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 José to Dulles Intl.

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

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

    Currently, November is the cheapest month in which you can book a flight from San José to Washington, D.C. Dulles Intl Airport (average of $254). Flying from San José to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $384). 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
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Reston
Rockville
Herndon
Fredericksburg
Laurel
Hyattsville
Manassas
Hanover
Chantilly
Lanham
Falls Church
Waldorf
Silver Spring
Largo
Clinton

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Alternative routes for San José to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
San José to Baltimore flights
Liberia to Dulles Intl flights
Liberia to Baltimore flights

Top 3 airlines flying from San José to Dulles Intl

Discover the top 3 airlines that operate flights from San José 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 June 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$201Average$351FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$281FlexibilityNo cancel feeOn-time69%
Copa AirlinesCheapest$277Average$354FlexibilityNo cancel feeOn-time70%

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