$144 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 8/1. 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$354
Liberia
Liberia1 stop$276
San José
San José1 stop$354
Liberia
Liberia1 stop$276

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

Mon, Nov 16 - Fri, Nov 20
United Airlines Logo
6:30 am - 1:10 pm
IAD
-
LIR
7h 40m
1 stop
United Airlines Logo
5:15 pm - 7:19 am
LIR
-
IAD
13h 04m
1 stop
$276United Airlines
Mon, Aug 31 - Wed, Sep 16
United Airlines Logo
6:30 am - 12:10 pm
IAD
-
LIR
7h 40m
1 stop
United Airlines Logo
1:20 pm - 11:28 am
LIR
-
IAD
20h 08m
1 stop
$284United Airlines
Sun, Aug 23 - Wed, Oct 7
Delta Logo
6:00 am - 12:00 pm
IAD
-
LIR
8h 00m
1 stop
Delta Logo
1:25 pm - 12:20 am
LIR
-
IAD
8h 55m
1 stop
$306Delta
Mon, Jul 13 - Thu, Jul 16
American Airlines Logo
8:22 pm - 11:30 am
IAD
-
LIR
17h 08m
1 stop
American Airlines Logo
3:40 pm - 11:07 am
LIR
-
IAD
17h 27m
1 stop
$320American Airlines
Mon, Nov 16 - Fri, Nov 20
American Airlines Logo
8:09 pm - 12:16 pm
IAD
-
LIR
17h 07m
2 stops
American Airlines Logo
1:21 pm - 8:41 am
LIR
-
IAD
18h 20m
2 stops
$325American Airlines
Sun, Aug 9 - Fri, Oct 2
Delta Logo
6:00 am - 12:00 pm
IAD
-
LIR
8h 00m
1 stop
Delta Logo
1:25 pm - 12:32 am
LIR
-
IAD
9h 07m
1 stop
$328Delta
Mon, Jul 13 - Thu, Jul 16
American Airlines Logo
7:31 pm - 11:30 am
IAD
-
LIR
17h 59m
2 stops
American Airlines Logo
2:15 pm - 12:38 pm
LIR
-
IAD
20h 23m
2 stops
$329American Airlines
Tue, Jul 7 - Wed, Jul 15
United Airlines Logo
6:30 am - 12:10 pm
IAD
-
LIR
7h 40m
1 stop
United Airlines Logo
4:30 pm - 7:22 am
LIR
-
IAD
12h 52m
1 stop
$330United Airlines
Mon, Jun 29 - Tue, Jul 7
Copa Airlines Logo
2:21 am - 8:21 am
IAD
-
SJO
8h 00m
1 stop
Copa Airlines Logo
10:03 am - 4:21 am
SJO
-
IAD
16h 18m
1 stop
$366Copa Airlines
Sat, Sep 5 - Thu, Sep 10
Copa Airlines Logo
2:25 am - 8:19 am
IAD
-
SJO
7h 54m
1 stop
Copa Airlines Logo
4:08 am - 4:20 am
SJO
-
IAD
22h 12m
1 stop
$369Copa 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 $435 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 $435.

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 $384 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 $751.

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 August, when tickets cost $109 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $266 and $246 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, Saturday is the most expensive day to fly from Washington Dulles Airport to Costa Rica. For your return ticket, we recommend flying on a Thursday 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 2 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$144
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 19% 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.

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 8397 reviews
8.5Crew
7.2Food
8.1Boarding
7.8Entertainment
7.8Comfort
Airline reviews

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

2.0 MediocreBen, Jun 2026
ATL - HSV
Read more Delta reviews

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

They didn’t have any headphones for the entertainment screen and their USB port didn’t accommodate a USB-C for more modern phones. The food was just ok. The staff was friendly but the seats were very uncomfortable for a full flight.

I had to run from the end of terminal one to the end of terminal two to make the connecting flight....probably a kilometer. No electric carts were available. I'm 76 and literally had to run to make the connection at the last minute. The connecting time was absolutely unrealistic. When Last Call was announced, I tried to get other Copa gate staff to call Gate 221 to let them know I was on my way, but they said no. I came within 1 minute of missing the flight.

Entire experience from check in to landing was amazing the flight crew was excellent and friendly. Seats were comfortable.

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

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

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.

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.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

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

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.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

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

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

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

Overall, the flight went well and the service was good. However, there was a very frightening moment during landing in Bogotá. Just as the plane was about to touch down, it suddenly went back up into the air. The aircraft was not descending straight and seemed to move left and right, which made the situation feel unstable. This was quite scary. After going back up, the plane circled for about 15 minutes before attempting to land again. Although I understand that safety always comes first and situations like this can happen, it was still a shocking experience for passengers.

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.

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

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.

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

Information on your arrival and departure airports