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$120+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$287
(Cheapflightsfares)

One-way from

$120
(Delta)

Popular in

December

Cheapest in

October

Average price

$360

Good round-trip deal

$461 or less

Good one-way deal

$129 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. 6% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 22, 2025.

This CheapOair deal was found by Cheapflights users on 2/22. 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.
Tue 2/251:24 amIAD - SJO
1 stop12h 37mVolaris El Salvador
Fri 2/2811:15 amSJO - IAD
1 stop22h 54mVolaris El Salvador
Deal found 2/22$286
This Cheapflightsfares deal was found by Cheapflights users on 2/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/12:35 amIAD - SJO
1 stop7h 05mAvianca
Tue 4/84:20 pmSJO - IAD
1 stop6h 55mAvianca
Deal found 2/21$290
This Copa Airlines deal was found by Cheapflights users on 2/22. 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.
Mon 3/31:18 amIAD - SJO
1 stop9h 42mCopa Airlines
Sun 3/98:45 amSJO - IAD
1 stop13h 45mCopa Airlines
Deal found 2/22$293
This Booking.com deal was found by Cheapflights users on 2/21. 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 10/175:05 pmIAD - SJO
1 stop8h 30mMultiple Airlines
Tue 10/215:00 pmSJO - IAD
1 stop17h 19mMultiple Airlines
Deal found 2/21$296
This American Airlines deal was found by Cheapflights users on 2/22. 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 11/85:03 amIAD - SJO
2 stops15h 27mAmerican Airlines
Sat 11/221:55 pmSJO - IAD
2 stops19h 34mAmerican Airlines
Deal found 2/22$298
This American Airlines deal was found by Cheapflights users on 2/21. 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.
Sun 5/118:02 pmIAD - LIR
2 stops19h 03mAmerican Airlines
Wed 6/412:54 pmLIR - IAD
2 stops17h 40mAmerican Airlines
Deal found 2/21$329
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Fri 3/710:20 pmIAD - LIR
1 stop15h 35mUnited Airlines
Mon 3/107:50 amLIR - IAD
1 stop13h 58mUnited Airlines
Deal found 2/21$341
This Delta deal was found by Cheapflights users on 2/22. 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.
Wed 3/197:35 amIAD - LIR
1 stop7h 45mDelta
Tue 3/252:45 pmLIR - IAD
1 stop7h 46mDelta
Deal found 2/22$347
This United Airlines deal was found by Cheapflights users on 2/21. 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 10/2510:06 pmIAD - SJO
1 stop14h 19mUnited Airlines
Sat 11/11:30 pmSJO - IAD
Nonstop4h 42mUnited Airlines
Deal found 2/21$348
This Delta deal was found by Cheapflights users on 2/21. 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.
Sat 5/106:00 amIAD - SJO
1 stop9h 05mDelta
Tue 5/201:11 pmSJO - IAD
1 stop8h 23mDelta
Deal found 2/21$381
This Air Canada deal was found by Cheapflights users on 2/20. 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.
Mon 3/242:45 pmIAD - LIR
1 stop24h 45mAir Canada
Fri 3/281:45 pmLIR - IAD
1 stop23h 28mAir Canada
Deal found 2/20$478
This Mytrip deal was found by Cheapflights users on 2/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/232:22 amIAD - LIR
2 stops12h 48mMultiple Airlines
Mon 3/316:40 amLIR - IAD
2 stops27h 40mMultiple Airlines
Deal found 2/21$624

Find flights from Dulles Intl to Costa Rica within your budget

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 February 22, 2025.

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

Tue 3/11

2:05 pm-12:22 pm

1 stop24h 17m

San José Juan Santamaria Intl

Sun 3/23

11:15 am-12:09 pm

1 stop22h 54m

$287

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 4/1

2:35 am-7:40 am

1 stop7h 05m

San José Juan Santamaria Intl

Tue 4/8

4:20 pm-1:15 am

1 stop6h 55m

$290

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 3/4

8:30 am-7:07 pm

1 stop11h 37m

San José Juan Santamaria Intl

Sun 3/9

5:51 am-12:30 am

1 stop16h 39m

$293

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 5/17

8:06 pm-12:50 pm

2 stops18h 44m

San José Juan Santamaria Intl

Fri 5/23

12:21 pm-8:51 am

2 stops18h 30m

$298

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Wed 3/5

3:50 pm-11:20 pm

1 stop8h 30m

San José Juan Santamaria Intl

Mon 3/10

11:15 am-12:09 pm

1 stop22h 54m

$301

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Sun 5/11

8:02 pm-1:05 pm

2 stops19h 03m

Liberia

Wed 6/4

12:54 pm-8:34 am

2 stops17h 40m

$329

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Fri 3/7

10:20 pm-12:55 pm

1 stop15h 35m

Liberia

Mon 3/10

7:50 am-11:48 pm

1 stop13h 58m

$341

Washington, D.C.Liberia

IAD - LIR

IADLIR

Washington, D.C. Dulles Intl

Wed 3/19

7:35 am-1:20 pm

1 stop7h 45m

Liberia

Tue 3/25

2:45 pm-12:31 am

1 stop7h 46m

$347

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Wed 5/14

10:20 pm-12:26 pm

1 stop16h 06m

San José Juan Santamaria Intl

Sat 5/17

6:00 am-7:06 am

1 stop23h 06m

$358

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 5/10

6:00 am-1:05 pm

1 stop9h 05m

San José Juan Santamaria Intl

Tue 5/20

1:11 pm-11:34 pm

1 stop8h 23m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 31 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.

Travel insights for flights from Dulles Intl to Costa Rica

Get recent, data-driven insights about flights from Dulles Intl to Costa Rica including ideal travel times, pricing trends, and more.

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 February 22, 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 47% 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 February 22, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Costa Rica, such as Alaska Airlines, Delta and Copa Airlines. 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
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,700 reviews
Alaska Airlines
8.0
Very good
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,212 reviews
Alaska Airlines
8.0
Very good
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Copa Airlines
7.6
Good
1,502 reviews
Alaska Airlines
8.0
Very good
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines
7.4
Good
8,759 reviews
Alaska Airlines
8.0
Very good
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,700 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Delta. According to our data, you can fly for as low as $120. Users have also found prices from $125 and $127 on Copa 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 (86%), Avianca Costa Rica (86%), United Airlines( 58%).

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

    On average you can expect to pay $453 for a flight from Washington, D.C. Dulles Intl Airport to Costa Rica. The cheapest flight overall is $125 while the most popular route, (Washington, D.C. Dulles Intl - San José Juan Santamaria Intl) is currently priced at $203.

  • 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Volaris El SalvadorCheapest$179Average$290FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$182Average$663FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$217Average$532FlexibilityNo cancel feeOn-time71%
AviancaCheapest$242Average$384FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$270Average$422FlexibilityNo cancel feeOn-time70%
DeltaCheapest$276Average$520FlexibilityNo cancel feeOn-timeN/A
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