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Dulles Intl

$238+ Cheap flights from Santiago de los Caballeros (STI) to Dulles Intl (IAD)

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
STI — IAD
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Santiago de los Caballeros to Dulles Intl

Cheapest flights from Santiago de los Caballeros to Dulles Intl
Explore the most affordable flight options available from Santiago de los Caballeros to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This Mytrip deal was found by Cheapflights users on 1/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/234:40 pm
STI
-
IAD
3 stops19h 43m
Multiple Airlines
Mon 3/28:30 am
IAD
-
STI
3 stops30h 05m
Multiple Airlines
Deal found 1/24$597
This American Airlines deal was found by Cheapflights users on 1/26. 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 2/188:00 am
STI
-
IAD
2 stops13h 30m
American Airlines
Wed 2/255:00 am
IAD
-
STI
2 stops15h 30m
American Airlines
Deal found 1/26$599
This Copa Airlines deal was found by Cheapflights users on 1/24. 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.
Mon 2/233:51 pm
STI
-
IAD
1 stop12h 24m
Copa Airlines
Sun 3/11:18 am
IAD
-
STI
1 stop12h 38m
Copa Airlines
Deal found 1/24$620
This Copa Airlines deal was found by Cheapflights users on 1/26. 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.
Sat 2/73:51 pm
STI
-
IAD
1 stop8h 41m
Copa Airlines
Sun 2/81:18 am
IAD
-
STI
1 stop12h 38m
Copa Airlines
Deal found 1/26$628
This deal was found by Cheapflights users on 1/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:52 pm
STI
-
IAD
1 stop9h 13m
United Airlines
Tue 3/318:23 am
IAD
-
STI
1 stop6h 49m
United Airlines
Deal found 1/25$822
This United Airlines deal was found by Cheapflights users on 1/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/304:00 pm
STI
-
IAD
1 stop8h 18m
United Airlines
Mon 2/26:00 am
IAD
-
STI
1 stop7h 53m
United Airlines
Deal found 1/24$913

Find flight deals from Santiago de los Caballeros to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Santiago de los Caballeros (STI) to Dulles Intl (IAD). 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$522
(Delta)

One-way from

$238
(Kiwi.com)
Provider with most accurate pricing for Santiago de los Caballeros-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Santiago de los Caballeros-Washington, D.C. Dulles Intl flights.
Search Deals
From Santiago de los Caballeros to Washington, D.C. Dulles Intl
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One-way flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Santiago de los Caballeros to Dulles Intl 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 January 26, 2026.
Use the filters below to find and compare flights from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Santiago de los Caballeros

Fly to

Dulles Intl

Route

Depart

Return

Price

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Mon 2/23

4:40 pm-11:23 am

3 stops19h 43m

Washington, D.C. Dulles Intl

Mon 3/2

8:30 am-3:35 pm

3 stops30h 05m

$597

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Wed 2/18

8:00 am-8:48 am

2 stops25h 48m

Washington, D.C. Dulles Intl

Wed 2/25

5:00 am-9:30 pm

2 stops15h 30m

$599

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Mon 2/23

3:51 pm-3:15 am

1 stop12h 24m

Washington, D.C. Dulles Intl

Sun 3/1

1:18 am-2:56 pm

1 stop12h 38m

$620

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Wed 2/18

6:39 am-7:09 pm

1 stop13h 30m

Washington, D.C. Dulles Intl

Wed 2/25

12:24 pm-1:34 am

1 stop12h 10m

$628

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Sat 2/7

3:51 pm-11:32 pm

1 stop8h 41m

Washington, D.C. Dulles Intl

Sun 2/8

1:18 am-2:56 pm

1 stop12h 38m

$628

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Fri 3/6

12:52 pm-9:05 pm

1 stop9h 13m

Washington, D.C. Dulles Intl

Tue 3/31

8:23 am-3:12 pm

1 stop6h 49m

$822

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Mon 4/20

3:40 pm-12:36 am

2 stops32h 56m

$238

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Fri 5/8

6:10 am-7:16 pm

1 stop13h 06m

$349

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Fri 5/8

1:32 pm-11:59 pm

2 stops10h 27m

$358

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Sun 2/15

4:40 pm-4:13 pm

3 stops24h 33m

$358

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 13 results
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Compare providers for flights from Santiago de los Caballeros to Dulles Intl

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 Santiago de los Caballeros to Dulles Intl in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*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 Santiago de los Caballeros-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Santiago de los Caballeros-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Santiago de los Caballeros-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Santiago de los Caballeros-Washington, D.C. Dulles Intl Airport 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 Santiago de los Caballeros-Washington, D.C. Dulles Intl Airport 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 Santiago de los Caballeros to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Santiago de los Caballeros 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 Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport?

Currently, May is the cheapest month in which you can book a flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport (average of $226). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $680). 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.

Related info for your journey

Find useful and relevant information for your journey from Santiago de los Caballeros to Dulles Intl. 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 from for flights from Santiago de los Caballeros to Washington, D.C. Dulles Intl?

    Located just 6.8 mi from the city center, Santiago de los Caballeros is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Santiago de los Caballeros. Booking flights from Santiago (STI) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 0 different airlines.

  • How long is the flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport?

    Departing from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport will take you 12h 24m. Airlines will cover a distance of 1410 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Santiago de los Caballeros to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Santiago de los Caballeros to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santiago de los Caballeros to Dulles Intl?

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

  • Can I find deals for business class flights from Santiago de los Caballeros to Dulles Intl?

    Yes. Cheapflights offers flight deals from Santiago de los Caballeros to Dulles Intl 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 Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport?

    Currently, May is the cheapest month in which you can book a flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport (average of $226). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $680). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
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Silver Spring
Herndon
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Hanover
Linthicum Heights
Rockville
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Bowie
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Upper Marlboro

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