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$111+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
avr. 22 — avr. 291
mar. 4/22
mar. 4/29
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 avril 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$268
(CheapOair)

One-way from

$111
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$513

Good round-trip deal

$324 or less

Good one-way deal

$155 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. 17% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 avril 17, 2025.

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/152:22 amIAD - SJO
1 stop9h 52mMultiple Airlines
dim. 5/2511:15 amSJO - IAD
1 stop23h 05mMultiple Airlines
Deal found 4/17$268
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 6/252:35 amIAD - SJO
1 stop8h 45mAvianca
lun. 6/305:10 pmSJO - IAD
Nonstop4h 35mAvianca
Deal found 4/17$270
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/222:22 amIAD - SJO
1 stop13h 05mVolaris El Salvador
mer. 4/302:13 pmSJO - IAD
1 stop20h 07mVolaris El Salvador
Deal found 4/17$272
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 5/116:17 amIAD - SJO
1 stop18h 00mAmerican Airlines
jeu. 5/152:10 pmSJO - IAD
1 stop7h 52mAmerican Airlines
Deal found 4/17$274
This Copa Airlines 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 4/302:21 amIAD - SJO
1 stop13h 33mCopa Airlines
jeu. 5/810:57 amSJO - IAD
1 stop15h 23mCopa Airlines
Deal found 4/17$276
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.
mer. 5/285:26 pmIAD - LIR
2 stops20h 19mAmerican Airlines
mer. 6/412:45 pmLIR - IAD
2 stops17h 53mAmerican Airlines
Deal found 4/16$286
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 10/1810:18 pmIAD - LIR
1 stop15h 52mUnited Airlines
sam. 10/251:03 pmLIR - IAD
1 stop9h 29mUnited Airlines
Deal found 4/16$305
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/126:00 amIAD - LIR
1 stop8h 00mDelta
ven. 5/231:25 pmLIR - IAD
1 stop9h 03mDelta
Deal found 4/17$322
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 4/1810:20 pmIAD - SJO
1 stop15h 35mUnited Airlines
ven. 4/2511:13 amSJO - IAD
1 stop9h 06mUnited Airlines
Deal found 4/17$353
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 5/302:25 pmIAD - LIR
1 stop23h 35mAir Canada
sam. 6/712:35 pmLIR - IAD
1 stop19h 06mAir Canada
Deal found 4/16$481
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/84:20 pmIAD - LIR
1 stop22h 04mMultiple Airlines
dim. 5/1110:15 amLIR - IAD
2 stops16h 05mMultiple Airlines
Deal found 4/17$521
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/287:25 pmIAD - LIR
1 stop12h 55mAlaska Airlines
jeu. 6/511:20 amLIR - IAD
1 stop26h 54mAlaska Airlines
Deal found 4/16$536

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 avril 17, 2025.
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.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

jeu. 5/15

2:22 am-10:14 am

1 stop9h 52m

San José Juan Santamaria Intl

dim. 5/25

11:15 am-12:20 pm

1 stop23h 05m

$268

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

mer. 6/25

2:35 am-9:20 am

1 stop8h 45m

San José Juan Santamaria Intl

lun. 6/30

5:10 pm-11:45 pm

Nonstop4h 35m

$270

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

dim. 5/11

6:17 am-10:17 pm

1 stop18h 00m

San José Juan Santamaria Intl

jeu. 5/15

2:10 pm-12:02 am

1 stop7h 52m

$274

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

jeu. 6/5

2:05 pm-10:14 am

1 stop22h 09m

San José Juan Santamaria Intl

lun. 6/9

11:15 am-12:20 pm

1 stop23h 05m

$275

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

mer. 4/30

2:21 am-1:54 pm

1 stop13h 33m

San José Juan Santamaria Intl

jeu. 5/8

10:57 am-4:20 am

1 stop15h 23m

$276

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

mer. 5/28

5:26 pm-11:45 am

2 stops20h 19m

Liberia

mer. 6/4

12:45 pm-8:38 am

2 stops17h 53m

$286

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

mer. 4/30

6:09 am-2:23 pm

1 stop10h 14m

Liberia

dim. 5/4

1:20 pm-11:58 pm

1 stop8h 38m

$306

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

lun. 5/12

6:00 am-12:00 pm

1 stop8h 00m

Liberia

ven. 5/16

1:25 pm-12:28 am

1 stop9h 03m

$322

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

ven. 5/30

6:10 am-10:39 pm

1 stop18h 29m

San José Juan Santamaria Intl

ven. 6/6

5:30 am-11:58 pm

1 stop16h 28m

$356

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

ven. 5/30

2:25 pm-12:00 pm

1 stop23h 35m

Liberia

sam. 6/7

12:35 pm-9:41 am

1 stop19h 06m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 29 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $398). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in March is currently the most expensive (average of $555). 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 avril 17, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Costa Rica, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 48% versus a flight in the morning.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Costa Rica?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Costa Rica. Price data was last updated on November 18, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Costa Rica flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

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 avril 17, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Costa Rica, such as Alaska Airlines, Southwest and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Copa Airlines
7.6
Good
1,409 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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.

  • 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 United Airlines. According to our data, you can fly for as low as $111. Users have also found prices from $114 and $115 on Volaris El Salvador and Avianca, respectively.

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

    On average you can expect to pay $318 for a flight from Washington, D.C. Dulles Intl Airport to Costa Rica. The cheapest flight overall is $110 while the most popular route, (Washington, D.C. Dulles Intl - San José Juan Santamaria Intl) is currently priced at $214.

  • 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica (average of $398). Flying from Washington, D.C. Dulles Intl Airport to Costa Rica in March is currently the most expensive (average of $555). 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 avril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Volaris El SalvadorCheapest$200Average$291FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$206Average$633FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$217Average$490FlexibilityNo cancel feeOn-time71%
AviancaCheapest$241Average$390FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$512FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$276Average$414FlexibilityNo cancel feeOn-time70%

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