$107 Find Cheap Flights from Washington Dulles Airport to Costa Rica

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Costa Rica departing on 1/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Cheap Flights from Dulles Intl to Costa Rica

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San José
San José1 stop$250
Liberia
Liberia1 stop$265
San José
San José1 stop$250
Liberia
Liberia1 stop$265

Book Cheap Dulles Intl to Costa Rica Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Costa Rica that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Costa Rica

Tue, Feb 17 - Tue, Feb 24
Avianca Logo
1:30 am - 7:45 amIAD-SJO
7h 15m1 stop
Avianca Logo
4:15 pm - 12:10 amSJO-IAD
6h 55m1 stop
$250Avianca
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Tue, Jan 20 - Mon, Feb 2
Multiple Airlines Logo
1:25 am - 1:57 pmIAD-SJO
13h 32m1 stop
Multiple Airlines Logo
4:15 pm - 12:10 amSJO-IAD
6h 55m1 stop
$251Multiple Airlines
Find Deal
Sat, Nov 15 - Sat, Nov 22
United Airlines Logo
8:57 am - 12:55 pmIAD-SJO
4h 58mnonstop
United Airlines Logo
2:20 pm - 11:44 pmSJO-IAD
8h 24m1 stop
$255United Airlines
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Sat, Nov 15 - Sun, Nov 23
United Airlines Logo
6:00 am - 1:15 pmIAD-SJO
8h 15m1 stop
United Airlines Logo
8:45 am - 10:13 pmSJO-IAD
12h 28m1 stop
$260United Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 8
American Airlines Logo
6:34 am - 12:11 pmIAD-SJO
30h 37m2 stops
American Airlines Logo
6:20 am - 10:59 pmSJO-IAD
15h 39m1 stop
$263American Airlines
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Mon, Nov 10 - Thu, Nov 13
American Airlines Logo
6:04 am - 2:18 pmIAD-LIR
9h 14m1 stop
American Airlines Logo
1:21 pm - 10:19 amLIR-IAD
19h 58m2 stops
$269American Airlines
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Wed, Jan 21 - Fri, Jan 30
Delta Logo
6:00 am - 1:00 pmIAD-SJO
8h 00m1 stop
Delta Logo
7:00 am - 8:47 pmSJO-IAD
12h 47m1 stop
$278Delta
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Sat, Nov 15 - Thu, Nov 20
Copa Airlines Logo
3:24 pm - 7:33 amIAD-SJO
17h 09m1 stop
Copa Airlines Logo
2:53 pm - 3:22 amSJO-IAD
11h 29m1 stop
$282Copa Airlines
Find Deal
Sun, Feb 22 - Wed, Mar 4
Delta Logo
7:50 pm - 12:50 pmIAD-LIR
18h 00m1 stop
Delta Logo
3:55 pm - 12:07 amLIR-IAD
7h 12m1 stop
$285Delta
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Thu, Nov 13 - Sun, Nov 16
Copa Airlines Logo
3:24 pm - 4:50 pmIAD-SJO
26h 26m3 stops
Copa Airlines Logo
6:07 pm - 3:22 amSJO-IAD
8h 15m1 stop
$287Copa Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Dulles Intl to Costa Rica flights

Get data-powered insights and trends into flights from Dulles Intl to Costa Rica to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Washington, D.C. Dulles Intl Airport to Costa Rica flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Costa Rica from Washington, D.C. Dulles Intl Airport found in the last 72 hours was to San José, at $261 round-trip. The most popular route is from Washington, D.C. Dulles Intl Airport (IAD) to San José (SJO), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $261.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Costa Rica?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $367, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Costa Rica, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Costa Rica is October, when tickets cost $289 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of round-trip tickets is $570 and $539 respectively.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Costa Rica?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Costa Rica clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Costa Rica on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Washington Dulles Airport to Costa Rica. For your return ticket, we recommend flying on a Friday and avoiding Sundays for the best deals.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Costa Rica?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Costa Rica, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Costa Rica, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$107
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 37% increase in price.
Flight from Washington Dulles Airport to Liberia

FAQs - booking Costa Rica flights

  • How do I get to Monteverde Cloud Forest Biological Preserve?

    Costa Rica is known for many nature attractions, including Monteverde Cloud Forest Reserve. If you’re traveling to this site, you should plan to fly to La Fortuna Arenal Airport (FON), which is approximately 15 miles away from the reserve, but it can also be reached by flying to LIR airport, approximately 44 miles away, or SJO airport, approximately 36 miles away.

  • How can I make my trip from Washington to Costa Rica more sustainable?

    The airline you fly makes a big difference in sustainability. For example, Avianca has introduced a fleet renewal program to improve it carbon footprint. By adding over 88 new A320 NEO aircraft to its fleet, Avianca has achieved a fuel savings of 20% and reduced its CO2 emissions compared its previous fleet.

  • How many bags can I bring when I fly from Washington to Costa Rica?

    Delta, United, American, and Avianca all allow passengers to bring one personal item and one carry-on bag each into the cabin. These airlines charge fees to check bags, and the fees may vary based on class or airline status.

  • What are some typical layovers between Washington and Costa Rica?

    When not flying direct, Avianca has layovers at La Aurora International Airport (GUA) in Guatemala and El Salvador International Airport (SAL). Flights between IAD and LIR airports may have layovers in Texas at George Bush Intercontinental Airport (IAH) in Houston, Dallas/Fort Worth International Airport Texas (DFW), or at Charlotte Douglas International Airport (CLT).

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Costa Rica?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Costa Rica.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Costa Rica?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington Dulles Airport to Costa Rica is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Costa Rica?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Washington Dulles Airport to Costa Rica with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Costa Rica?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Washington Dulles Airport to Costa Rica up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Costa Rica?

    The cheapest time of day to fly to Costa Rica is generally in the afternoon, when round-trip flights cost $335 on average. Morning departures are around 102% more expensive than evening flights, on average. The most expensive time of day to fly to Costa Rica is generally in the morning, which is peak travel time and where the average cost of a ticket is $783.

Top tips for finding cheap flights to Costa Rica

  • Travelers seeking flights from Washington, DC, to Costa Rica will find plenty of options from Dulles International Airport (IAD) to destinations throughout Costa Rica. First-time visitors will want to start their trips in San Jose, the capital of Costa Rica, located in the center of the country.
  • Passengers seeking the shortest flight times between Dulles International Airport (I (IAD) and Juan Santamaría International Airport (SJO), San Jose’s main airport, can find direct flights on Colombia-based airline Avianca and United Airlines. Direct flights between IAD and SJO take around five to seven hours. Flights with layovers can vary from about six to 18 hours, depending on the layover schedule, location, and direction of the flight.
  • Dulles International Airport (IAD) airport is a hub for United Airlines and also a major travel center for domestic and international flights throughout the world. SJO is a hub for Avianca Costa Rica and is the second busiest airport in Latin America.
  • Another popular destination in Costa Rica is Liberia airport, also called Daniel Oduber International Airport (LIR), located in northwestern Costa Rica. Travelers can find options of flights from IAD to LIR on Delta Air Lines, United, and American Airlines. Flights between IAD and LIR will typically each have one layover.
  • Travelers who want a relaxing experience before takeoff can take advantage of lounges at IAD airport. IAD offers United Club, Capital One Lounge, and USO Lounge, along with many other airline lounges. SJO airport offers Mastercard Black Lounge, available for Mastercard holders, Santamaria VIP Lounge, and VIP Lounge Costa Rica (Copa Club), which are available via payment to enter.

Reviews of the top 5 airlines serving from Dulles Intl to Costa Rica

 
Need help choosing which airline to fly with from Dulles Intl to Costa Rica? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7993 reviews
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
7.9Comfort
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

Some of the Air hostesses are not that friendly. Need improvement

Simply as follows:- First, there was no vegetarian option for the meal Second, only 2 washrooms for the entire economy class.

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

Cops Airlines is fantastic! The level of care and professionalism provided by the entire crew was top rate.

We had a great flight just wished they had a tv so we can see a movie that would of made my trip excellent.

Great experience with a crew always thinking in the passenger

I selected first class expecting excetional service. It was mediocre at best. The food service was cold, meal choices was poor and on one leg they did provide dessert. I did enjoy the lay day seat but the movies were old and nothing current. Boarding the plane is always hot. So boarding is quite warm until your in the air. I took a small personal air fan. Update the meals and movies.

Very happy with my flight. I would definitely recommend it.

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

Horrible experience. Flight cancelled. Arrived at destination 12 hs later. No one gave us an answer or any information. Very very poor service. We won’t ever travel again with Avianca

Did not fly with Pakistan International Airlines. Have never flown with Pakistan International Airlines.

Boarding, crew were excellent, food was ok and entertainment need to improve

Luggage lost and nowhere to be found, no response from either airline regarding my bag

The seats were uncomfortable and barely reclined at all. Very little leg room despite being business class. The crew was friendly and the food was good. Had to use my own phone for in-flight entertainment.

No food, terms when selling are not clear. To pricy for the service in general

It was horrible. My experience with Avianca. I didn’t know it was Pakistan international Airlines but anyway, whatever it is it is bad horrible you guys need to upgrade everything in those planes. And you guys charge $130 for a carry-on did they wanna let me in with my carry-on that I travel everywhere with the luggage you guys are such a dog thank you

Boarding was excessively slow. They do it by groups in a way that it doesn’t make sense. After business class , ppl that need assistance and any other priority group they should have ppl board from the back to the front. First rows 20+. Then 15+. Then 10, etc. having ppl sitting in the back board last makes no sense. The libe backame long as soon as ppl on rows 10 or so where told to board. The line went all the way up the ramp and tunnel for 25 mins.

Seats are very tight even in Plus, no complimentary snacks or beverage

The chicken that was served in business class was cold!

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