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$105+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap 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 January 8, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$237
(United Airlines)

One-way from

$105
(Gotogate)

Popular in

December

Cheapest in

October

Average price

$352

Good round-trip deal

$352 or less

Good one-way deal

$182 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-San José Juan Santamaria Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-San José Juan Santamaria Intl flights.
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From Washington, D.C. Dulles Intl to Costa Rica
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One-way flight from Washington, D.C. Dulles Intl to Costa Rica
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Highest demand for flights based on searches. 12% potential increase in price ($51 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Costa Rica.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Costa Rica.
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Find 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 January 8, 2026.

This United Airlines deal was found by Cheapflights users on 1/8. 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.
Wed 3/46:00 amIAD - SJO
1 stop7h 42mUnited Airlines
Tue 3/105:30 amSJO - IAD
1 stop15h 06mUnited Airlines
Deal found 1/8$237
This Gotogate deal was found by Cheapflights users on 1/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/82:07 pmIAD - SJO
1 stop18h 43mMultiple Airlines
Thu 3/123:05 pmSJO - IAD
1 stop11h 05mMultiple Airlines
Deal found 1/8$238
This Super.com deal was found by Cheapflights users on 1/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/21:30 amIAD - SJO
1 stop7h 15mAvianca
Tue 2/104:15 pmSJO - IAD
1 stop6h 55mAvianca
Deal found 1/7$240
This American Airlines deal was found by Cheapflights users on 1/7. 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.
Mon 3/26:00 amIAD - SJO
1 stop9h 53mAmerican Airlines
Wed 3/412:35 amSJO - IAD
2 stops18h 55mAmerican Airlines
Deal found 1/7$242
This Booking.com deal was found by Cheapflights users on 1/7. 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.
Thu 2/51:07 pmIAD - SJO
1 stop8h 18mMultiple Airlines
Mon 2/94:15 pmSJO - IAD
1 stop6h 55mMultiple Airlines
Deal found 1/7$243
This American Airlines deal was found by Cheapflights users on 1/7. 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 1/106:00 amIAD - SJO
1 stop18h 43mAmerican Airlines
Fri 1/162:54 pmSJO - IAD
1 stop24h 37mAmerican Airlines
Deal found 1/7$244
This Booking.com deal was found by Cheapflights users on 1/6. 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.
Tue 3/31:07 pmIAD - SJO
1 stop8h 18mMultiple Airlines
Tue 3/174:15 pmSJO - IAD
1 stop6h 55mMultiple Airlines
Deal found 1/6$246
This American Airlines deal was found by Cheapflights users on 1/7. 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 2/75:46 pmIAD - SJO
2 stops21h 08mAmerican Airlines
Sat 2/1412:35 amSJO - IAD
2 stops18h 55mAmerican Airlines
Deal found 1/7$247
This American Airlines deal was found by Cheapflights users on 1/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/95:26 pmIAD - SJO
1 stop22h 35mAmerican Airlines
Mon 1/124:02 pmSJO - IAD
2 stops19h 34mAmerican Airlines
Deal found 1/8$248
This Booking.com deal was found by Cheapflights users on 1/5. 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.
Thu 3/51:07 pmIAD - SJO
1 stop8h 18mMultiple Airlines
Thu 3/124:15 pmSJO - IAD
1 stop6h 55mMultiple Airlines
Deal found 1/5$249
This American Airlines deal was found by Cheapflights users on 1/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/95:26 pmIAD - SJO
1 stop22h 35mAmerican Airlines
Tue 1/132:54 pmSJO - IAD
1 stop24h 37mAmerican Airlines
Deal found 1/8$250
This Gotogate deal was found by Cheapflights users on 1/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/24:15 pmIAD - SJO
1 stop8h 25mAvianca
Mon 2/94:15 pmSJO - IAD
1 stop6h 55mAvianca
Deal found 1/6$251

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 January 8, 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

Dulles Intl

Fly to

Costa Rica

Route

Depart

Return

Price

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Wed 3/11

10:31 pm-11:55 am

1 stop15h 24m

Liberia

Wed 3/18

7:35 am-10:36 pm

1 stop13h 01m

$266

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Thu 2/5

8:15 am-6:37 pm

1 stop11h 22m

Liberia

Mon 2/9

8:35 am-10:18 pm

1 stop12h 43m

$266

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Mon 1/19

6:03 am-1:10 pm

1 stop8h 07m

Liberia

Fri 1/23

12:50 pm-5:21 am

1 stop15h 31m

$266

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Fri 1/30

6:03 am-6:37 pm

1 stop13h 34m

Liberia

Tue 2/3

8:35 am-8:49 pm

1 stop11h 14m

$266

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Thu 5/28

10:06 pm-10:00 am

1 stop13h 54m

Liberia

Mon 6/1

4:35 pm-7:35 am

1 stop13h 00m

$266

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Tue 4/14

7:26 pm-11:28 am

2 stops18h 02m

Liberia

Mon 4/20

2:40 pm-6:41 pm

2 stops26h 01m

$270

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Thu 1/22

6:03 am-6:37 pm

1 stop13h 34m

Liberia

Sun 1/25

8:35 am-10:18 pm

1 stop12h 43m

$276

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Fri 1/23

6:03 am-1:10 pm

1 stop8h 07m

Liberia

Sun 2/1

2:01 pm-11:46 am

1 stop20h 45m

$278

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Tue 1/20

6:03 am-1:10 pm

1 stop8h 07m

Liberia

Sat 1/24

2:20 pm-11:24 am

1 stop20h 04m

$278

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Fri 1/23

5:26 pm-12:37 pm

2 stops20h 11m

Liberia

Wed 2/4

1:46 pm-11:12 pm

1 stop8h 26m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 41 results
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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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $152). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in February is currently the most expensive (average of $256). 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 January 8, 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 January 8, 2026.
See what other customers who have flown with Delta, Copa Airlines, and United 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
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
8,029 reviews
Delta
7.9
Good
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
7.6
Good
1,562 reviews
Delta
7.9
Good
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
9,141 reviews
Delta
7.9
Good
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
7.2
Good
11,095 reviews
Delta
7.9
Good
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
6.6
Okay
2,494 reviews
Delta
7.9
Good
8,029 reviews

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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 $266, United Airlines can have you in Costa Rica from Washington, D.C. Dulles Intl Airport in 15h 24m. 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 most reliable airlines from Washington, D.C. Dulles Intl Airport to Costa Rica?

    Before booking your flight to Costa Rica from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Avianca (94%), Avianca Costa Rica (94%), United Airlines( 70%).

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

    On average you can expect to pay $404 for a flight from Washington, D.C. Dulles Intl Airport to Costa Rica. The cheapest flight overall is $109 while the most popular route, (Washington, D.C. Dulles Intl - San José Juan Santamaria Intl) is currently priced at $221.

  • 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $152). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in February is currently the most expensive (average of $256). 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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Alternative routes for Dulles Intl to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$462FlexibilityNo cancel feeOn-timeN/A
Volaris El SalvadorCheapest$200Average$296FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$235Average$543FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$237Average$464FlexibilityNo cancel feeOn-time71%
AviancaCheapest$242Average$373FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$244Average$351FlexibilityNo cancel feeOn-time70%

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