$126 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 4/29. 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.
1 adult
1 adult, Economy, 0 bags

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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$294
Liberia
Liberia1 stop$336
San José
San José1 stop$294
Liberia
Liberia1 stop$336

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

Thu, May 7 - Tue, May 12
Avianca Logo
3:40 am - 8:30 am
IAD
-
SJO
6h 50m
1 stop
Avianca Logo
5:25 pm - 2:15 am
SJO
-
IAD
6h 50m
1 stop
$294Avianca
Tue, Apr 21 - Sun, Apr 26
Avianca Logo
3:40 am - 8:30 am
IAD
-
SJO
6h 50m
1 stop
Avianca Logo
3:10 pm - 2:45 am
SJO
-
IAD
9h 35m
1 stop
$295Avianca
Sat, Apr 25 - Mon, May 4
Avianca Logo
3:40 am - 8:30 am
IAD
-
SJO
6h 50m
1 stop
Avianca Logo
3:10 pm - 4:20 am
SJO
-
IAD
11h 10m
1 stop
$296Avianca
Tue, Apr 7 - Wed, Apr 22
Copa Airlines Logo
4:33 pm - 8:20 am
IAD
-
SJO
17h 47m
1 stop
Copa Airlines Logo
10:04 am - 4:22 am
SJO
-
IAD
16h 18m
1 stop
$304Copa Airlines
Sun, May 3 - Tue, May 12
Copa Airlines Logo
2:21 am - 9:06 am
IAD
-
SJO
8h 45m
1 stop
Copa Airlines Logo
6:19 pm - 4:21 am
SJO
-
IAD
8h 02m
1 stop
$306Copa Airlines
Tue, Apr 28 - Wed, May 6
Delta Logo
7:06 am - 12:00 pm
IAD
-
LIR
6h 54m
1 stop
Delta Logo
1:25 pm - 12:42 am
LIR
-
IAD
9h 17m
1 stop
$336Delta
Sat, May 9 - Sat, May 16
American Airlines Logo
5:59 pm - 1:40 pm
IAD
-
LIR
21h 41m
1 stop
American Airlines Logo
12:30 pm - 7:25 pm
LIR
-
IAD
28h 55m
2 stops
$340American Airlines
Sat, Apr 25 - Tue, Apr 28
American Airlines Logo
8:07 pm - 1:10 pm
IAD
-
LIR
19h 03m
2 stops
American Airlines Logo
2:40 pm - 7:25 pm
LIR
-
IAD
26h 45m
2 stops
$341American Airlines
Tue, Jun 16 - Thu, Jun 25
United Airlines Logo
10:20 pm - 10:00 am
IAD
-
LIR
13h 40m
1 stop
United Airlines Logo
11:10 am - 12:31 am
LIR
-
IAD
11h 21m
1 stop
$344United Airlines
Mon, Apr 13 - Fri, Apr 17
United Airlines Logo
6:00 am - 2:25 pm
IAD
-
LIR
10h 25m
1 stop
United Airlines Logo
3:27 pm - 11:33 am
LIR
-
IAD
18h 06m
1 stop
$350United Airlines
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 $276 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 $276.

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

The average price for all round-trip flights from Washington, D.C. Dulles Intl Airport to Costa Rica depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Costa Rica is generally at night, when round-trip flights cost $385 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 $719.

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $374 on average.

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 $270 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $442 and $423 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$126
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Washington Dulles Airport to San José

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.

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 8288 reviews
7.9Comfort
7.2Food
8.1Boarding
8.5Crew
7.8Entertainment
Airline reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

10.0 ExcellentDebra, Mar 2026
PBI - ATL
Read more Delta reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

The food is terrible I ask for water never got transport my mother we’re late and my sister from Lima was the worst waiting to long for wheelchair

Copa staff at PTY and one particular crew member were unhelpful & rude.

Horrible. No TV or any type of entertainment on board. Passwnger listening to/watching stuff on their own phone with no headphones making it noise and uncomfortable for everyone else, little/tiny food portions, old seats, useless wifi (cant access anything). Horrible exlerience especially it was a lomg distance flight with kids.

There should be a warning regarding the quality of the aircraft on the website as we reserve the tickets. There was no TV or any type of screen onboard. The wifi they offer is good for nothing. Traveling 9 hours straight with kids and no type of entetainment was horrible. I wish I had been informed prior so I could buy a ticket with another airline. The food was a joke too. A very tiny portion per passenger. They also charged $100 per checked bag. With United I used to pay $60. So, fair to say that I wont be flying Copa anymore. Their aircraft was super old, outdated, no entertainment, with nearly no onboard food.

I always enjoy flying Copa. There are very few airlines where I can enjoy a comfortable sleep in-flight. The snacks weren't the best, but they sufficed. The in-flight entertainment was fantastic, and I crossed another movie off my watch list.

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.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Not really sure I enjoyed the flight at all. The flight attendants seemed a little tired and rude at times. The snacks were lacking in taste and sustenance. The flight was incredibly turbulent for three plus hours and the pilot had to do a second pass to land at our final destination because he was coming in so fast. He must have taken a short cut and because of it we had to suffer the violent turbulence and the dropping down. It had to be one of if not the worse flights I have ever been on and have traveled vastly all over the world.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

delayed due to weather. Could not communicate with family since the wifi was broken

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

It was delayed and I lost my connection flight to Cali and I missed my Mom's funeral

I actually upgraded to the medium level of seats from basic and even doing that it may have been physically the most uncomfortable flight I have ever had. They packed everyone like is a train to death camp. It was a red eye so I hoped to get some sleep but it was physically impossible to find a comfortable way to rest. I met other folks on the same flight and they said the same thing. It was an utterly miserable flight and if I have any other options I will never fly with them again

only a bag of chips and a bottle of water in business class was served

Boarding was late due to the company’s that cleaned the aircraft (very poorly done) and the catering company. The entertainment system was not working for this six hour flight, uncomfortable seats in business (barely any cushion or recline). The airline staff is very good but the planes are horrible and not well maintained.

Deplaning was a mess, I sat in business (seats are horrible) and the front door had a problem so we had to deplane from the rear exit. The stairs were not tall enough to reach so there was a large step down from the plane to the top of the stairs.

Staff are the rudest in the industry … awful customer service … will never fly Avianca again

Pros: we leave and arrive on time Cons: the most uncomfortable seats ever. You cant recline at all your seats. No entertainment No TVs flight attendants didn't provide even a glass of water. You have to go to back of the airplane and ask for one. I am Colombian and I remember seeing the flight attendants very neat, elegants which is or was a staple of Avianca.it was one with tennis shoes, no male up, the hair was messy... that was really odd.

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

Last seat of Bussines Class it does recline but passenger seating behind kept pushing since they did not have space once my seat was reclined

I like the crew they're very friendly. I don't like. on five hour flight they not offered snacks. Any drink. Not even coffee

Everything you need to know for your flight from Dulles Intl to Costa Rica

Information on your arrival and departure airports