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$139+ Cheap flights from Dulles Intl (IAD) to Costa Rica

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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
May 20 — May 271
Wed 5/20
Wed 5/27
1 adult, Economy
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Cheap flight deals from Dulles Intl to Costa Rica

Cheapest flights from Dulles Intl to Costa Rica
Explore the most affordable flight options available from Dulles Intl to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 20, 2026.

This American Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 6/36:18 am
IAD
-
SJO
1 stop18h 24m
American Airlines
Wed 6/171:59 pm
SJO
-
IAD
1 stop8h 14m
American Airlines
Deal found 4/15$310
This American Airlines deal was found by Cheapflights users on 4/15. 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 5/28:07 pm
IAD
-
SJO
2 stops17h 00m
American Airlines
Tue 5/56:30 am
SJO
-
IAD
2 stops24h 19m
American Airlines
Deal found 4/15$315
This Booking.com deal was found by Cheapflights users on 4/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:33 pm
IAD
-
SJO
1 stop17h 47m
Copa Airlines
Sat 5/26:19 pm
SJO
-
IAD
1 stop8h 02m
Copa Airlines
Deal found 4/19$317
This Copa Airlines deal was found by Cheapflights users on 4/16. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/144:38 pm
IAD
-
SJO
1 stop17h 43m
Copa Airlines
Sun 5/176:19 pm
SJO
-
IAD
1 stop8h 02m
Copa Airlines
Deal found 4/16$318
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Thu 5/76:25 am
IAD
-
SJO
2 stops14h 42m
American Airlines
Sun 5/1011:35 pm
SJO
-
IAD
2 stops22h 24m
American Airlines
Deal found 4/15$320
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:24 pm
IAD
-
SJO
2 stops18h 26m
American Airlines
Mon 6/11:59 pm
SJO
-
IAD
1 stop27h 34m
American Airlines
Deal found 4/16$321
This Copa Airlines deal was found by Cheapflights users on 4/16. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/142:21 am
IAD
-
SJO
1 stop8h 00m
Copa Airlines
Mon 5/1810:05 am
SJO
-
IAD
1 stop16h 16m
Copa Airlines
Deal found 4/16$322
This Copa Airlines deal was found by Cheapflights users on 4/16. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/72:21 am
IAD
-
SJO
1 stop8h 45m
Copa Airlines
Tue 5/126:19 pm
SJO
-
IAD
1 stop8h 02m
Copa Airlines
Deal found 4/16$326
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 5/261:06 pm
IAD
-
SJO
2 stops26h 03m
American Airlines
Sat 6/61:59 pm
SJO
-
IAD
1 stop8h 14m
American Airlines
Deal found 4/15$328
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 4/227:00 am
IAD
-
SJO
1 stop16h 36m
American Airlines
Wed 4/2912:10 pm
SJO
-
IAD
2 stops18h 39m
American Airlines
Deal found 4/15$330
This Booking.com deal was found by Cheapflights users on 4/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:21 am
IAD
-
SJO
1 stop8h 45m
Copa Airlines
Mon 6/85:57 pm
SJO
-
IAD
1 stop8h 24m
Copa Airlines
Deal found 4/17$331
This Copa Airlines deal was found by Cheapflights users on 4/16. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:38 pm
IAD
-
SJO
1 stop17h 43m
Copa Airlines
Mon 5/256:01 pm
SJO
-
IAD
1 stop8h 20m
Copa Airlines
Deal found 4/16$333

Find flight deals from Dulles Intl to Costa Rica

Keep the following information in mind while searching for Dulles Intl to Costa Rica flight deals. Data was last updated April 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$310
(American Airlines)

One-way from

$139
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$388

Good round-trip deal

$341 or less

Good one-way deal

$153 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-San José Juan Santamaria Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to Costa Rica
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Costa Rica
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($53 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Costa Rica.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Costa Rica.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Costa Rica 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 April 20, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Mon 5/4

4:38 pm-7:09 am

1 stop16h 31m

San José Juan Santamaria Intl

Sat 5/9

10:05 am-4:21 am

1 stop16h 16m

$318

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 10/10

4:34 pm-7:10 am

1 stop16h 36m

San José Juan Santamaria Intl

Sun 10/18

6:17 pm-4:20 am

1 stop8h 03m

$318

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 5/19

4:38 pm-7:09 am

1 stop16h 31m

San José Juan Santamaria Intl

Mon 5/25

10:05 am-4:21 am

1 stop16h 16m

$333

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Thu 9/10

9:35 am-6:24 pm

1 stop10h 49m

San José Juan Santamaria Intl

Thu 9/17

6:17 pm-4:20 am

1 stop8h 03m

$337

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Mon 6/15

2:21 am-11:06 am

1 stop10h 45m

San José Juan Santamaria Intl

Sat 6/20

5:47 am-3:05 pm

1 stop7h 18m

$337

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Fri 5/22

4:38 pm-7:09 am

1 stop16h 31m

San José Juan Santamaria Intl

Sun 5/24

8:47 am-4:21 am

1 stop17h 34m

$344

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Mon 5/25

2:21 am-12:21 pm

1 stop12h 00m

San José Juan Santamaria Intl

Sun 5/31

5:50 am-12:33 am

1 stop16h 43m

$405

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 7/25

4:26 pm-7:12 am

1 stop16h 46m

San José Juan Santamaria Intl

Sun 8/2

8:45 am-4:21 am

1 stop17h 36m

$411

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 7/21

4:26 pm-7:12 am

1 stop16h 46m

San José Juan Santamaria Intl

Sat 7/25

1:37 pm-4:21 am

1 stop12h 44m

$426

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Thu 5/21

9:37 am-7:01 pm

1 stop11h 24m

San José Juan Santamaria Intl

Mon 5/25

8:47 am-4:21 am

1 stop17h 34m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 42 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica 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 Costa Rica

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

Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $102). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in July is currently the most expensive (average of $241). 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 CR?

Find hourly flight availability from Dulles Intl to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 20, 2026.

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

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated April 20, 2026.
See what other customers who have flown with Delta,Copa Airlines, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Costa Rica have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,426 reviews
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Copa Airlines
7.5
Good
1,581 reviews
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,608 reviews
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,628 reviews
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Avianca
6.5
Okay
2,513 reviews
Delta
7.9
Good
8,426 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    For as low as $366, Copa Airlines can have you in Costa Rica from Washington, D.C. Dulles Intl Airport in 7h 03m. There are 2020 mi between Washington, D.C. Dulles Intl Airport and Costa Rica. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $95. Users have also found prices from $100 and $101 on American Airlines and United Airlines, respectively.

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Costa Rica?

    On average you can expect to pay $253 for a flight from Washington, D.C. Dulles Intl Airport to Costa Rica. The cheapest flight overall is $129 while the most popular route, (Washington, D.C. Dulles Intl - San José Juan Santamaria Intl) is currently priced at $318.

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

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

  • How can I find direct flights from Dulles Intl to Costa Rica?

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

  • Can I find deals for business class flights from Dulles Intl to Costa Rica?

    Yes. Cheapflights offers flight deals from Dulles Intl to Costa Rica 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 Costa Rica?

    Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $102). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in July is currently the most expensive (average of $241). 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

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Top 6 airlines flying from Dulles Intl to Costa Rica

Discover the top 6 airlines that operate flights from Dulles Intl to Costa Rica. 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 April 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Volaris El SalvadorCheapest$102Average$299FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$168Average$483FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$169Average$336FlexibilityNo cancel feeOn-time70%
AviancaCheapest$234Average$358FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$235Average$496FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$238Average$454FlexibilityNo cancel feeOn-time71%

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