$109 Cheap Flights from Washington (IAD) to San José (SJO)

View $109 flight on Wed, Sep 3, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)

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Cheap Flights from Washington to San José (IAD-SJO)

Prices were available within the past 7 days and start at $109 for one-way flights and $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Nov 4 - Sat, Nov 8
IAD
Washington
SJO
San José
$243 Roundtrip, found 2 days ago
$243
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Nov 4 from Washington to San José, returning Sat, Nov 8, priced at $243 found 2 days ago
Copa
Wed, Sep 3 - Wed, Oct 1
IAD
Washington
SJO
San José
$244 Roundtrip, just found
$244
Roundtrip
just found
Select Copa flight, departing Wed, Sep 3 from Washington to San José, returning Wed, Oct 1, priced at $244 just found
United
Tue, Nov 4 - Sat, Nov 8
IAD
Washington
SJO
San José
$246 Roundtrip, found 2 days ago
$246
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 4 from Washington to San José, returning Sat, Nov 8, priced at $246 found 2 days ago
Copa
Sat, Oct 25 - Sat, Nov 1
IAD
Washington
SJO
San José
$247 Roundtrip, found 21 hours ago
$247
Roundtrip
found 21 hours ago
Select Copa flight, departing Sat, Oct 25 from Washington to San José, returning Sat, Nov 1, priced at $247 found 21 hours ago
Copa
Wed, Nov 12 - Thu, Nov 27
IAD
Washington
SJO
San José
$250 Roundtrip, found 2 days ago
$250
Roundtrip
found 2 days ago
Select Copa flight, departing Wed, Nov 12 from Washington to San José, returning Thu, Nov 27, priced at $250 found 2 days ago
American Airlines
Tue, Nov 4 - Mon, Nov 10
IAD
Washington
SJO
San José
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Washington to San José, returning Mon, Nov 10, priced at $253 found 1 day ago
Copa
Wed, Sep 3 - Wed, Oct 1
IAD
Washington
SJO
San José
$255 Roundtrip, just found
$255
Roundtrip
just found
Select Copa flight, departing Wed, Sep 3 from Washington to San José, returning Wed, Oct 1, priced at $255 just found
Copa
Thu, Feb 5 - Fri, Feb 13
IAD
Washington
SJO
San José
$255 Roundtrip, just found
$255
Roundtrip
just found
Select Copa flight, departing Thu, Feb 5 from Washington to San José, returning Fri, Feb 13, priced at $255 just found
Volaris El Salvador
Thu, May 21 - Mon, May 25
IAD
Washington
SJO
San José
$257 Roundtrip, found 3 hours ago
$257
Roundtrip
found 3 hours ago
Select Volaris El Salvador flight, departing Thu, May 21 from Washington to San José, returning Mon, May 25, priced at $257 found 3 hours ago
avianca
Tue, Oct 14 - Thu, Oct 23
IAD
Washington
SJO
San José
$279 Roundtrip, found 5 hours ago
$279
Roundtrip
found 5 hours ago
Select avianca flight, departing Tue, Oct 14 from Washington to San José, returning Thu, Oct 23, priced at $279 found 5 hours ago

Find the cheapest month to fly from Washington (IAD) to San José (SJO)

October is typically the cheapest month to fly

From $234 - $345 per traveler.

Graph displaying average flight prices per month

Alternative airports near San José

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Juan Santamaria Intl. SJO. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $244
SJO
Juan Santamaria Intl.
Cheapest
Average driving time to city center20 min
Flights from $244
Flights from Washington (IAD) to San José (SJO)
Origin airport
Washington Dulles Intl.
Destination airport
Juan Santamaría Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines, American Airlines, Copa, Delta, Frontier Airlines, Southwest Airlines, United, Volaris El Salvador, avianca
Roundtrip price
$243
Distance
2043 mi
Average flight time
6 hours 5 mins

Washington to San José Flights

The cheapest times to fly from Washington to San José

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to San José are during the month of November. You can find some of the cheapest flights from Washington to San José with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to San José

Sunday is one of the best days to book for cheap flights from Washington to San José: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to San José

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to San José in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to San José flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to San José airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) cost?
Secure a cheap one-way flight from $109 or cheap return flight from $243 from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
The cheapest month to fly from IAD to SJO is November, when demand is low. Off-peak months are typically when airlines offer better prices between these airports.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
If you're departing from Washington Dulles Intl. Airport (IAD), you can take a nonstop flight to Juan Santamaria Intl. Airport (SJO) with United Airlines.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from IAD to SJO. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
On average, you can take your pick of 1 direct flights taking off from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) every week. If you can't see one that fits your travel plans, consider taking a flight that has a layover. Filter your search on Expedia to include one or more stops and opt for the next best option.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
The 8 AM departures from IAD to SJO are typically the busiest. They can also be more expensive. If you want to save on your fare, book during off-peak hours.
What day of the week has the most flights from IAD to SJO?
If you jet off on a Saturday, you'll get the largest range of choices for flights from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO).
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
Washington Dulles Intl. Airport (IAD)'s earliest flight to Juan Santamaria Intl. Airport (SJO) departs at approximately 8:56AM UTC-5. With a total journey time of 4h 59m, you'll land at around 12:55PM UTC-6.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
The average flight time from IAD to SJO is 4 hours and 59 minutes, covering a total distance of 2,000 mi.
What airline has the least delays from IAD to SJO?
Consider booking with United Airlines if you'd like to fly straight from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) without any delays. This carrier has the best track record for punctuality, with an on-time performance of 83%. Want to be updated if anything changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) route, aim to fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San José from Washington Dulles Intl. Airport (IAD)?
Juan Santamaria Intl. Airport (SJO) is the only airport in San José with direct flights from Washington Dulles Intl. Airport (IAD). Check out your options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO) last-minute?
Booking your ticket from IAD to SJO right before your journey is typically more expensive. However, if you're flexible with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book an IAD to SJO flight and hotel package?
Booking an IAD to SJO flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Juan Santamaria Intl. Airport (SJO)?
If you reserved your IAD to SJO flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.