$137 Cheap Flights from San José (SJO) to Washington (IAD)

View $137 flight on Thu, Dec 25, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $137 for one-way flights and $216 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Nov 1 - Tue, Feb 10
SJO
San José
IAD
Washington
$216 Roundtrip, found 6 hours ago
$216
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Nov 1 from San José to Washington, returning Tue, Feb 10, priced at $216 found 6 hours ago
United
Wed, Feb 11 - Sun, Feb 22
SJO
San José
IAD
Washington
$221 Roundtrip, found 3 days ago
$221
Roundtrip
found 3 days ago
Select United flight, departing Wed, Feb 11 from San José to Washington, returning Sun, Feb 22, priced at $221 found 3 days ago
United
Wed, Feb 18 - Mon, Feb 23
SJO
San José
IAD
Washington
$226 Roundtrip, found 5 hours ago
$226
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Feb 18 from San José to Washington, returning Mon, Feb 23, priced at $226 found 5 hours ago
United
Sat, Nov 1 - Thu, Nov 6
SJO
San José
IAD
Washington
$228 Roundtrip, found 1 day ago
$228
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from San José to Washington, returning Thu, Nov 6, priced at $228 found 1 day ago
United
Wed, Oct 29 - Sun, Nov 9
SJO
San José
IAD
Washington
$231 Roundtrip, found 1 day ago
$231
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 29 from San José to Washington, returning Sun, Nov 9, priced at $231 found 1 day ago
United
Wed, Nov 26 - Sun, Dec 7
SJO
San José
IAD
Washington
$233 Roundtrip, found 6 hours ago
$233
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Nov 26 from San José to Washington, returning Sun, Dec 7, priced at $233 found 6 hours ago
Volaris El Salvador
Wed, May 20 - Thu, May 21
SJO
San José
IAD
Washington
$246 Roundtrip, found 6 days ago
$246
Roundtrip
found 6 days ago
Select Volaris El Salvador flight, departing Wed, May 20 from San José to Washington, returning Thu, May 21, priced at $246 found 6 days ago
Copa
Fri, Mar 6 - Tue, Mar 10
SJO
San José
IAD
Washington
$252 Roundtrip, found 6 hours ago
$252
Roundtrip
found 6 hours ago
Select Copa flight, departing Fri, Mar 6 from San José to Washington, returning Tue, Mar 10, priced at $252 found 6 hours ago
Volaris Costa Rica
Tue, Mar 17 - Tue, Mar 31
SJO
San José
IAD
Washington
$253 Roundtrip, found 3 days ago
$253
Roundtrip
found 3 days ago
Select Volaris Costa Rica flight, departing Tue, Mar 17 from San José to Washington, returning Tue, Mar 31, priced at $253 found 3 days ago
American Airlines
Wed, Feb 18 - Mon, Feb 23
SJO
San José
IAD
Washington
$264 Roundtrip, found 5 hours ago
$264
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Wed, Feb 18 from San José to Washington, returning Mon, Feb 23, priced at $264 found 5 hours ago

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

September is typically the cheapest month to fly

From $225 - $305 per traveler.

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $226
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $226
Flights from San José (SJO) to Washington (IAD)
Origin airport
Juan Santamaría Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines, American Airlines, Copa, Delta, Frontier Airlines, Southwest Airlines, United, Volaris El Salvador, avianca
Roundtrip price
$215
Distance
2043 mi
Average flight time
7 hours 55 mins

San José to Washington Flights

The cheapest times to fly from San José to Washington

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 San José to Washington are during the month of November. You can find some of the cheapest flights from San José to Washington with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San José to Washington: 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 San José to Washington

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 San José to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $137 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 San José to Washington 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 San José to Washington 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 Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $137 or cheap return flight from $216 from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
November is the cheapest month to fly from SJO to IAD. Planning your trip for the off-season is often the key to scoring lower fares.
Which airlines fly direct from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
When jetting out of Juan Santamaria Intl. Airport (SJO), you can hop on a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline that'll fly you from SJO to IAD, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
On average, Juan Santamaria Intl. Airport (SJO) offers 1 nonstop flights to Washington Dulles Intl. Airport (IAD) weekly. If you want more options, take advantage of Expedia's filter tool to discover flights with a layover. Fit in a quick visit to another city or simply break up your travels.
What are the most popular departure times for flights from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
The 2 PM departures from SJO to IAD see the highest demand. Prices can be higher for these popular slots. If you're hoping to save money, pick a less crowded time to fly.
What day of the week has the most flights from SJO to IAD?
If you depart on a Saturday, you'll get the largest range of choices for flights from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
Hop on the earliest flight at around 2:30PM UTC-6, leaving from Juan Santamaria Intl. Airport (SJO). You'll be flying for around 4h 42m, touching down at Washington Dulles Intl. Airport (IAD) at approximately 8:12PM UTC-5.
How long does it take to fly from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
It takes roughly 4 hours and 42 minutes to fly the 2,000 mi from SJO to IAD.
What airline has the least delays from SJO to IAD?
Consider booking with United Airlines if you'd like to fly straight from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD) without any holdups. This carrier has the best track record for punctuality, with an on-time score of 85%. Want real-time updates? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
To land at Washington Dulles Intl. Airport (IAD) without delays, choose a flight that leaves Juan Santamaria Intl. Airport (SJO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Washington from Juan Santamaria Intl. Airport (SJO)?
If you're catching a direct flight from Juan Santamaria Intl. Airport (SJO) to Washington, you'll come into land at either Washington Dulles Intl. Airport (IAD) or Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
Is it cheaper to buy a plane ticket from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD) last-minute?
Waiting until just before your trip to book your flight from SJO to IAD generally means paying more. While you may come across some last-minute offers, they aren't always guaranteed. Keep your travel plans flexible for a better chance of scoring a bargain.
Is it cheaper to book a SJO to IAD flight and hotel package?
You'll generally save money by securing a SJO to IAD flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your preferred flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Juan Santamaria Intl. Airport (SJO) to Washington Dulles Intl. Airport (IAD)?
It's usually possible to cancel or reschedule your SJO to IAD flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.