$153 Find Cheap Flights from Washington Dulles Airport to Costa Rica - Compare and Save

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 8/15. 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$369
Liberia
Liberia2 stops$345
San José
San José1 stop$369
Liberia
Liberia2 stops$345

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, Oct 13 - Wed, Oct 21
American Airlines Logo
6:15 am - 1:18 pm
IAD
-
LIR
9h 03m
2 stops
American Airlines Logo
2:45 pm - 8:44 am
LIR
-
IAD
15h 59m
2 stops
$345American Airlines
Sun, Sep 13 - Thu, Sep 17
United Airlines Logo
10:29 pm - 12:10 pm
IAD
-
LIR
15h 41m
1 stop
United Airlines Logo
1:20 pm - 12:30 am
LIR
-
IAD
9h 10m
1 stop
$350United Airlines
Sat, Sep 12 - Thu, Sep 17
American Airlines Logo
4:56 pm - 1:18 pm
IAD
-
LIR
22h 22m
2 stops
American Airlines Logo
2:47 pm - 9:55 am
LIR
-
IAD
17h 08m
2 stops
$355American Airlines
Mon, Jan 11 - Thu, Jan 14
Delta Logo
7:00 am - 2:20 pm
IAD
-
LIR
8h 20m
1 stop
Delta Logo
3:25 pm - 9:11 am
LIR
-
IAD
16h 46m
1 stop
$360Delta
Tue, Jan 12 - Thu, Jan 14
Delta Logo
6:00 am - 2:20 pm
IAD
-
LIR
9h 20m
1 stop
Delta Logo
3:25 pm - 9:11 am
LIR
-
IAD
16h 46m
1 stop
$360Delta
Sun, Sep 13 - Thu, Sep 17
United Airlines Logo
10:29 pm - 12:10 pm
IAD
-
LIR
15h 41m
1 stop
United Airlines Logo
1:20 pm - 12:30 am
LIR
-
IAD
9h 10m
1 stop
$360United Airlines
Mon, Jan 25 - Sun, Jan 31
Avianca Logo
1:30 am - 8:35 am
IAD
-
SJO
8h 05m
1 stop
Avianca Logo
3:05 pm - 1:40 am
SJO
-
IAD
9h 35m
1 stop
$369Avianca
Tue, Sep 15 - Sun, Sep 20
Avianca Logo
3:40 am - 8:30 am
IAD
-
SJO
6h 50m
1 stop
Avianca Logo
5:05 am - 3:55 pm
SJO
-
IAD
8h 50m
1 stop
$369Avianca
Tue, Nov 17 - Tue, Nov 24
Copa Airlines Logo
8:32 am - 9:07 am
IAD
-
SJO
25h 35m
1 stop
Copa Airlines Logo
2:46 pm - 3:15 am
SJO
-
IAD
11h 29m
1 stop
$369Copa Airlines
Tue, Oct 20 - Tue, Oct 27
Copa Airlines Logo
2:25 am - 8:19 am
IAD
-
SJO
7h 54m
1 stop
Copa Airlines Logo
6:05 pm - 4:20 am
SJO
-
IAD
8h 15m
1 stop
$370Copa 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 5 days was to San José, at $351 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 5 days was $351.

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 $394 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 $750.

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 September, when tickets cost $304 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $486 and $477 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 Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Washington Dulles Airport to Costa Rica. For your return ticket, we recommend flying on a Tuesday 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 2 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know

Low season

September

Cheapest flight

$153
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 13% 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.
7.8
DeltaOverall score based on 8498 reviews
8.1Boarding
7.8Entertainment
7.8Comfort
7.2Food
8.5Crew
Airline reviews

Flight was delayed for about an hour but overall good experience

8.0 ExcellentNana, Jul 2026
DCA - ATL
Read more Delta reviews

Flight was delayed for about an hour but overall good experience

The gentleman at the gate I think his name is RIE was exceptional

Easiest airport experience ever in my life at MSP with Delta check-in and flight attendant gave us a bottle of champagne in celebration of our 10-year wedding anniversary, so overall amazing!

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

We where skipped for this flight will not head to Panama until tonight..

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.

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

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.

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

Did upgrade, travel in business it was great (more room I could sleep)

There was no individual at the front check in when I arrived. I waited for at least 15 minutes and walked around asking security/janitors if they could help and they did not have a solution. So I had to take my checked bag through security and they threw away some of my items. I ended up making it to the gate only a few minutes before it closed due to my waiting for an agent at check in.

Check in person said there would be lunch. We were first class passengers and lunch was chips.

Boarding groups were called up in Spanish only. Luckily I know some of the language. They gave out grilled cheese sandwiches and a cup of fruit. I was very disappointed. I could only eat the cup of fruit because the only other option was vanilla pudding. The entertainment system and seating were great though.

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Disorganized boarding. Mandatory to gate check bags. Curt flight staff. No space for cabin bag, even when I was in first class.

Patrons with larger bags were asked to check the bags when boarding. Seems like the most effective, and least costly way, way to successfully use the cramped space.

They cancelled our flight two times after rebooking us for a later flight. We never got on the plane. We found another solution by driving.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

Delayed boarding because a flight attendant couldn't find the gate...sat on the plane for over an hour at the gate because AA couldn't get one of the planes behind us to move

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

Overall a good experience, however Wifi was not working on the flight.

Human interaction. Thought there would be more service-even a smile would have been nice.

We booked seats next to each other. When we got the boarding passes, they were for different rows. The crew were reluctant to help us, so we ended up sitting separately. 1. What’s the point of reserving by seat number if you’re not going to honor that reservation? 2. Even if it gets messed up between reservation and boarding, how is the crew going to deny us the opportunity to arrange to sit together. There were plenty of people flying alone. It could’ve been easily accommodated. Not very customer-friendly at all.

The seats were the worst I have ever flown Too narrow, did not recline and the actual seat was hard as a rock. I will tell all travelers to stay away from Avianca flights.

They should provide water to passengers who ask for it

The worst experience I've ever had because the "people" @ Avianca wouldn't let me fly because they said I needed a round trip ticket

Seating was tight. Seats don't recline. Initial flight was cancelled. Lost two days of vacation.

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

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

I receive a service for what I pay, so it is fair.

They charged me $120 to check one bag and then charged me another $120 for a carryon. Ridiculous!

Voo longo nem mesmo água ou gelo é servido, se quiser tem que pagar. Embarque é péssimo, mau atendimento.

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

Information on your arrival and departure airports