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Dulles Intl

$143+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — IAD
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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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 October or February, booked 67 days in advance, depart on a Monday or Friday and return on a Tuesday

Cheap 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 July 28, 2025.

Round-trip from

$218
(Avianca)

One-way from

$143
(United Airlines)

Popular in

March

Cheapest in

October

Average price

$298

Good round-trip deal

$225 or less

Good one-way deal

$135 or less
From San José Juan Santamaria Intl to Washington, D.C. Dulles Intl
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One-way flight from San José Juan Santamaria Intl to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from San José Juan Santamaria Intl to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from San José Juan Santamaria Intl to Washington, D.C. Dulles Intl.
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Find 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 July 28, 2025.

This Avianca deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/284:20 pmSJO - IAD
1 stop6h 55mAvianca
Mon 8/41:05 amIAD - SJO
Nonstop4h 30mAvianca
Deal found 7/27$218
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:30 pmSJO - IAD
Nonstop4h 43mUnited Airlines
Sat 2/710:07 pmIAD - SJO
1 stop15h 49mUnited Airlines
Deal found 7/28$232
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amSJO - IAD
2 stops14h 56mAmerican Airlines
Wed 8/277:44 amIAD - SJO
2 stops14h 31mAmerican Airlines
Deal found 7/27$244
This Copa Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:08 amSJO - IAD
1 stop16h 12mCopa Airlines
Sun 10/262:25 amIAD - SJO
1 stop9h 33mCopa Airlines
Deal found 7/28$258
This CheapOair deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:17 pmSJO - IAD
1 stop6h 37mVolaris El Salvador
Sat 10/112:25 pmIAD - SJO
1 stop18h 19mVolaris El Salvador
Deal found 7/27$260
This eDestinos deal was found by Cheapflights users on 7/25. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:00 pmSJO - IAD
1 stop17h 37mMultiple Airlines
Sun 9/212:25 pmIAD - SJO
1 stop18h 19mMultiple Airlines
Deal found 7/25$262

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 July 28, 2025.
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

San José

Fly to

Dulles Intl

Route

Depart

Return

Price

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Thu 8/14

5:10 pm-11:45 pm

Nonstop4h 35m

Washington, D.C. Dulles Intl

Mon 8/18

1:05 am-3:35 am

Nonstop4h 30m

$218

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sat 12/6

2:30 pm-8:13 pm

Nonstop4h 43m

Washington, D.C. Dulles Intl

Sat 2/7

10:07 pm-12:56 pm

1 stop15h 49m

$232

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Wed 8/20

6:00 am-10:56 pm

2 stops14h 56m

Washington, D.C. Dulles Intl

Wed 8/27

7:44 am-8:15 pm

2 stops14h 31m

$244

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sun 1/18

2:20 pm-3:13 am

1 stop11h 53m

Washington, D.C. Dulles Intl

Fri 1/23

1:12 am-8:21 am

1 stop8h 09m

$258

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Mon 10/6

4:17 pm-12:54 am

1 stop6h 37m

Washington, D.C. Dulles Intl

Sat 10/11

2:25 pm-6:44 am

1 stop18h 19m

$260

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sat 9/13

5:00 pm-12:37 pm

1 stop17h 37m

Washington, D.C. Dulles Intl

Sun 9/21

2:25 pm-6:44 am

1 stop18h 19m

$262

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Tue 12/23

2:20 pm-11:23 pm

2 stops32h 03m

$143

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Mon 9/1

4:20 pm-1:15 am

1 stop6h 55m

$144

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Sun 11/9

10:08 am-3:22 am

1 stop16h 14m

$150

San JoséWashington, D.C.

SJO - IAD

SJOIAD

San José Juan Santamaria Intl

Wed 12/10

11:35 am-11:55 pm

2 stops11h 20m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 12 results
1
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The best insider tips for San José to Washington, D.C. Dulles Intl Airport 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 San José to Washington, D.C. Dulles Intl Airport trip
Airports
SJO

Leave for SJO with sufficient time to clear security. Arrive at least 3 hours before your flight to avoid delays.

Read more about SJOby Marisa Garcia
IAD

Use the Washington Metro Silver line for a cost-effective way to reach downtown from IAD in under 40 minutes.

Read more about IADby Ramsey Qubein
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on SJO

Marisa Garcia

Marisa Garcia

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

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 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, San José Province to Washington, D.C. Dulles Intl Airport?

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

The best time to book flights from San José, San José Province to Washington, D.C. Dulles Intl Airport is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from San José, San José Province to Washington, D.C. Dulles Intl Airport (average of $309). Flying from San José, San José Province 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 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 July 28, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 42% on flights from San José, San José Province to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the evening.

What is the cheapest day to fly from San José, San José Province to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from San José to Dulles Intl. Price data was last updated on December 16, 2024.

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

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

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 July 28, 2025.
Peruse reviews from past customers who have flown with Copa Airlines, United Airlines, and American Airlines 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
1,493 reviews

Boarding

7.8

Food

6.8

Comfort

7.4

Crew

8.1

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
4.0
Okay

Paul,Jun 2025

PTY - MIA

The boarding process was terrible. No one followed the group numbers. Everyone got up and stood in the tiles upon landing. People kept getting up during the meal and beverage service to go the bathrooms, the crew had to go back and forth in the isles, the service took forever.
Copa Airlines
7.5
Good
1,493 reviews
Copa Airlines
7.5
Good
1,493 reviews

Boarding

7.8

Food

6.8

Comfort

7.4

Crew

8.1

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
4.0
Okay

Paul,Jun 2025

PTY - MIA

The boarding process was terrible. No one followed the group numbers. Everyone got up and stood in the tiles upon landing. People kept getting up during the meal and beverage service to go the bathrooms, the crew had to go back and forth in the isles, the service took forever.
United Airlines
7.4
Good
8,893 reviews
Copa Airlines
7.5
Good
1,493 reviews

Boarding

7.8

Food

6.8

Comfort

7.4

Crew

8.1

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
4.0
Okay

Paul,Jun 2025

PTY - MIA

The boarding process was terrible. No one followed the group numbers. Everyone got up and stood in the tiles upon landing. People kept getting up during the meal and beverage service to go the bathrooms, the crew had to go back and forth in the isles, the service took forever.
American Airlines
7.2
Good
10,000 reviews
Copa Airlines
7.5
Good
1,493 reviews

Boarding

7.8

Food

6.8

Comfort

7.4

Crew

8.1

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
4.0
Okay

Paul,Jun 2025

PTY - MIA

The boarding process was terrible. No one followed the group numbers. Everyone got up and stood in the tiles upon landing. People kept getting up during the meal and beverage service to go the bathrooms, the crew had to go back and forth in the isles, the service took forever.
Avianca
6.7
Okay
2,386 reviews
Copa Airlines
7.5
Good
1,493 reviews

Boarding

7.8

Food

6.8

Comfort

7.4

Crew

8.1

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
4.0
Okay

Paul,Jun 2025

PTY - MIA

The boarding process was terrible. No one followed the group numbers. Everyone got up and stood in the tiles upon landing. People kept getting up during the meal and beverage service to go the bathrooms, the crew had to go back and forth in the isles, the service took forever.

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 1 outbound flight to Washington, D.C. Dulles Intl per day from 6 airlines. San José Juan Santamaria Intl is conveniently located just 8.8 mi from San José’s city center.

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

    According to our current data, Avianca ($218), United Airlines ($238), and American Airlines ($244) offers the cheapest pricing from San José, San José Province to Washington, D.C. Dulles Intl Airport. Avianca is 32% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $143. Users have also found prices from $144 and $155 on Avianca and American Airlines, respectively.

  • What are the cheapest flights from San José, San José Province to Washington, D.C. Dulles Intl Airport?

    The cheapest flight price from San José, San José Province to Washington, D.C. Dulles Intl Airport is $127. On average you can expect to pay $265. The most popular route, (San José Juan Santamaria Intl - Washington, D.C. Dulles Intl), can usually be booked for $232.

  • 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, San José Province to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from San José, San José Province to Washington, D.C. Dulles Intl Airport (average of $309). Flying from San José, San José Province 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
Fredericksburg
Gaithersburg
Easton
Towson
Linthicum Heights
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
Springfield
National Harbor
Dundalk

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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
San José to Reagan-National flights
Liberia to Reagan-National flights
Liberia to Dulles Intl flights
Liberia to Baltimore flights

Top 6 airlines flying from San José to Dulles Intl

Discover the top 6 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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Volaris El SalvadorCheapest$173Average$266FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$220Average$266FlexibilityNo cancel feeOn-time71%
DeltaCheapest$234Average$291FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$237Average$399FlexibilityNo cancel feeOn-time69%
AviancaCheapest$240Average$355FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$294Average$364FlexibilityNo cancel feeOn-time70%

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