HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San José

$185+ Cheap flights from Dulles Intl (IAD) to San José (SJO)

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJO
Aug 8 — Aug 151
Sat 8/8
Sat 8/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to San José with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San José Juan Santamaria Intl are usually found in October or September, booked 5 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Dulles Intl to San José

Cheapest flights from Dulles Intl to San José
Explore the most affordable flight options available from Dulles Intl to San José. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.

This American Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 8/262:53 pm
IAD
-
SJO
2 stops23h 10m
American Airlines
Mon 8/311:29 pm
SJO
-
IAD
2 stops26h 58m
American Airlines
Deal found 7/6$382
This Avianca deal was found by Cheapflights users on 7/4. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:35 pm
IAD
-
SJO
2 stops14h 55m
Avianca
Sun 8/233:10 pm
SJO
-
IAD
2 stops9h 05m
Avianca
Deal found 7/4$383
This American Airlines deal was found by Cheapflights users on 7/6. 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.
Mon 8/176:09 am
IAD
-
SJO
1 stop9h 43m
American Airlines
Fri 8/211:03 pm
SJO
-
IAD
2 stops18h 54m
American Airlines
Deal found 7/6$384
This American Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 7/85:03 am
IAD
-
SJO
2 stops19h 35m
American Airlines
Wed 7/152:11 pm
SJO
-
IAD
1 stop18h 56m
American Airlines
Deal found 7/6$385
This Avianca deal was found by Cheapflights users on 7/6. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:40 am
IAD
-
SJO
1 stop6h 50m
Avianca
Sat 8/14:35 pm
SJO
-
IAD
1 stop7h 40m
Avianca
Deal found 7/6$386
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:25 am
IAD
-
SJO
1 stop7h 54m
Copa Airlines
Wed 8/266:17 pm
SJO
-
IAD
1 stop8h 04m
Copa Airlines
Deal found 7/6$387
This Copa Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 7/296:25 am
IAD
-
SJO
1 stop14h 36m
Copa Airlines
Tue 9/2210:03 am
SJO
-
IAD
1 stop16h 17m
Copa Airlines
Deal found 7/6$388
This American Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 7/85:03 am
IAD
-
SJO
2 stops19h 35m
American Airlines
Thu 7/911:41 pm
SJO
-
IAD
2 stops17h 59m
American Airlines
Deal found 7/6$390
This Avianca deal was found by Cheapflights users on 7/8. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/34:10 am
IAD
-
SJO
1 stop9h 20m
Avianca
Thu 8/134:35 pm
SJO
-
IAD
1 stop7h 40m
Avianca
Deal found 7/8$391
This FlightHub deal was found by Cheapflights users on 7/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:35 pm
IAD
-
SJO
1 stop8h 05m
Avianca
Tue 9/15:25 pm
SJO
-
IAD
1 stop6h 50m
Avianca
Deal found 7/7$392
This Avianca deal was found by Cheapflights users on 7/9. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/255:35 pm
IAD
-
SJO
1 stop8h 05m
Avianca
Tue 8/44:35 pm
SJO
-
IAD
1 stop7h 40m
Avianca
Deal found 7/9$393

Find flight deals from Dulles Intl to San José

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San José (SJO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$382
(American Airlines)

One-way from

$185
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$453

Good round-trip deal

$652 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San José Juan Santamaria Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to San José Juan Santamaria Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to San José Juan Santamaria Intl
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San José Juan Santamaria Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to San José 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 July 9, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San José that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Mon 9/28

4:34 pm-9:04 am

1 stop18h 30m

San José Juan Santamaria Intl

Mon 10/5

10:03 am-4:20 am

1 stop16h 17m

$389

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Wed 10/21

4:34 pm-1:52 pm

1 stop23h 18m

San José Juan Santamaria Intl

Tue 10/27

5:38 am-12:37 am

1 stop16h 59m

$410

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 7/21

4:26 pm-7:12 am

1 stop16h 46m

San José Juan Santamaria Intl

Thu 7/23

2:49 pm-4:21 am

1 stop11h 32m

$440

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Thu 7/23

4:26 pm-7:12 am

1 stop16h 46m

San José Juan Santamaria Intl

Sat 8/1

5:55 pm-4:21 am

1 stop8h 26m

$453

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Tue 12/1

6:00 am-10:15 pm

1 stop17h 15m

San José Juan Santamaria Intl

Mon 12/21

7:00 am-3:11 pm

1 stop7h 11m

$512

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 8/15

10:10 pm-7:15 am

1 stop35h 05m

San José Juan Santamaria Intl

Fri 8/28

8:45 am-5:55 am

1 stop19h 10m

$562
Quickest round-trip

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 12/5

8:57 am-12:55 pm

Nonstop4h 58m

San José Juan Santamaria Intl

Sat 12/12

8:45 am-9:12 pm

1 stop11h 27m

$719

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Fri 10/9

7:24 pm-7:30 pm

3 stops50h 06m

San José Juan Santamaria Intl

Mon 10/12

7:00 am-5:53 pm

3 stops32h 53m

$858

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Sat 10/24

5:33 pm-7:30 pm

2 stops27h 57m

San José Juan Santamaria Intl

Sat 11/7

1:43 am-5:51 am

2 stops27h 08m

$927

Washington, D.C.San José

IAD - SJO

IADSJO

Washington, D.C. Dulles Intl

Fri 12/25

8:25 am-4:53 pm

1 stop9h 28m

San José Juan Santamaria Intl

Fri 1/8

8:08 am-3:13 am

1 stop18h 05m

$930

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Dulles Intl to San José

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to San José in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San José flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-San José flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San José flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San José flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San José flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to San José

Have a flexible travel schedule? Discover the best time to fly to San José 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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San José

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San José?

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to San José, you should look to book at least 4 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San José?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San José (average of $270). Flying from Washington, D.C. Dulles Intl Airport to San José in December is currently the most expensive (average of $498). 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 SJO?

Find hourly flight availability from Dulles Intl to San José. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 9, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to San José as you normally would.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to San José?

Reviews of airlines servicing San José

Get insights into the airlines that provide service to San José. 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 San José. Reviews last updated July 9, 2026.
Read reviews from past customers who have flown Delta,Copa Airlines, andUnited Airlines from Washington, D.C. Dulles Intl Airport to San José. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,456 reviews
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Copa Airlines
7.6
Good
1,565 reviews
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,966 reviews
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,798 reviews
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Avianca
6.5
Okay
2,523 reviews
Delta
7.8
Good
8,456 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to San José. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San José from Washington, D.C. Dulles Intl?

    Most people fly into San José Juan Santamaria Intl (SJO) if they book a flight to San José from Washington, D.C. Dulles Intl. On average, Juan Santamaria Intl has 0 inbound flights from Washington, D.C. Dulles Intl per day from 6 airlines. San José Juan Santamaria Intl is conveniently located just 8.8 mi from San José’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San José?

    Copa Airlines and Delta can get you from Washington, D.C. Dulles Intl Airport to San José in just under 17h 15m. Your travel time can differ by up to 1h 15m. The distance from Washington, D.C. Dulles Intl Airport to San José is about 2042 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San José round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to San José is Delta. Our recent data shows that you can find tickets from as low as $186 on this airline. Additional options worth looking into are Volaris El Salvador and Copa Airlines, starting at $197 and $207 round-trip. Users have found that Delta is 51% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San José one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to San José are United Airlines ($101), Avianca ($107), and Copa Airlines ($109).

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

    Looking at all options, your cheapest flight can be booked for $523. While the most popular route (Washington, D.C. Dulles Intl - San José Juan Santamaria Intl) can be booked for $319 on average, our data indicates $1,421 when flying from Washington, D.C. Dulles Intl Airport to San José.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to San José?

    Of the flights from Washington, D.C. Dulles Intl Airport to San José that have layovers, most of them stop in San Salvador.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to San José flights?

    Washington, D.C. Dulles Intl Airport to San José flights have a layover in Panama City the least frequently.

  • Can I find deals for flights from Dulles Intl to San José that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to San José flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to San José?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to San José.

  • Can I find deals for business class flights from Dulles Intl to San José?

    Yes. Cheapflights offers flight deals from Dulles Intl to San José 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 San José?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San José (average of $270). Flying from Washington, D.C. Dulles Intl Airport to San José in December is currently the most expensive (average of $498). 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

Traveling to a place near San José?

Book flights to San José if you plan to visit one of these locations
Alajuela
Jacó
Heredia
Dominical
Manuel Antonio

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to San José

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to San José flights
Reagan-National to San José flights
Dulles Intl to Liberia flights
Baltimore to Liberia flights

Top 6 airlines flying from Dulles Intl to San José

Discover the top 6 airlines that operate flights from Dulles Intl to San José. 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 July 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$186Average$356FlexibilityNo cancel feeOn-timeN/A
Volaris El SalvadorCheapest$197Average$340FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$207Average$367FlexibilityNo cancel feeOn-time70%
AviancaCheapest$236Average$392FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$240Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$521FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.