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Santiago de los Caballeros

$207+ Cheap flights from Dulles Intl (IAD) to Santiago de los Caballeros (STI)

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STI
Oct 13 — Oct 201
Mon 10/13
Mon 10/20
1 adult, Economy
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Cheap flight deals from Dulles Intl to Santiago de los Caballeros

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Santiago de los Caballeros (STI). 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 September 13, 2025.

Round-trip from

$462
(Mytrip)

One-way from

$207
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$591
From Washington, D.C. Dulles Intl to Santiago de los Caballeros
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One-way flight from Washington, D.C. Dulles Intl to Santiago de los Caballeros
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Highest demand for flights based on searches. 16% potential increase in price ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Dulles Intl to Santiago de los Caballeros

Cheapest flights from Dulles Intl to Santiago de los Caballeros
Explore the most affordable flight options available from Dulles Intl to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2025.

This Mytrip deal was found by Cheapflights users on 9/12. 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.
Fri 10/174:39 pmIAD - STI
2 stops17h 59mMultiple Airlines
Mon 10/2711:43 amSTI - IAD
3 stops23h 40mMultiple Airlines
Deal found 9/12$462
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Sat 10/188:25 amIAD - STI
3 stops26h 13mMultiple Airlines
Mon 10/2711:43 amSTI - IAD
3 stops23h 40mMultiple Airlines
Deal found 9/12$463
This Delta deal was found by Cheapflights users on 9/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:11 pmIAD - STI
1 stop11h 48mDelta
Fri 12/56:35 amSTI - IAD
1 stop13h 44mDelta
Deal found 9/12$467
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 11/138:09 pmIAD - STI
2 stops18h 24mAmerican Airlines
Fri 11/216:20 amSTI - IAD
2 stops18h 39mAmerican Airlines
Deal found 9/11$481
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Thu 11/136:24 amIAD - STI
2 stops13h 27mAmerican Airlines
Tue 11/187:00 amSTI - IAD
2 stops17h 07mAmerican Airlines
Deal found 9/12$482
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2012:09 pmIAD - STI
1 stop6h 57mDelta
Mon 10/276:00 amSTI - IAD
1 stop13h 18mDelta
Deal found 9/10$485
This Delta deal was found by Cheapflights users on 9/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:11 pmIAD - STI
1 stop11h 48mDelta
Sat 12/66:35 amSTI - IAD
1 stop13h 44mDelta
Deal found 9/12$487
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/208:25 pmIAD - STI
2 stops15h 48mAmerican Airlines
Mon 10/271:14 pmSTI - IAD
2 stops20h 41mAmerican Airlines
Deal found 9/10$489
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 12/69:15 amIAD - STI
2 stops10h 18mAmerican Airlines
Tue 12/96:04 amSTI - IAD
2 stops8h 30mAmerican Airlines
Deal found 9/11$493
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Thu 12/46:25 amIAD - STI
2 stops8h 07mAmerican Airlines
Sun 12/76:04 amSTI - IAD
2 stops11h 06mAmerican Airlines
Deal found 9/12$497

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Santiago de los Caballeros 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 September 13, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros that are best for you.

Fly from

Dulles Intl

Fly to

Santiago de los Caballeros

Route

Depart

Return

Price

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sun 11/23

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Wed 12/3

6:35 am-7:19 pm

1 stop13h 44m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Mon 11/24

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Wed 12/3

8:57 pm-11:39 am

1 stop15h 42m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sun 11/23

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Fri 12/5

6:35 am-7:19 pm

1 stop13h 44m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 11/25

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Wed 12/3

8:57 pm-11:39 am

1 stop15h 42m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sun 11/23

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Thu 12/4

6:35 am-7:19 pm

1 stop13h 44m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sun 11/23

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Tue 12/9

6:35 am-7:19 pm

1 stop13h 44m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 11/25

12:11 pm-7:36 pm

1 stop6h 25m

Santiago de los Caballeros

Thu 12/4

8:57 pm-11:39 am

1 stop15h 42m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 11/25

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Fri 12/5

8:57 pm-11:39 am

1 stop15h 42m

$467

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Mon 10/20

12:09 pm-7:06 pm

1 stop6h 57m

Santiago de los Caballeros

Mon 10/27

6:00 am-7:18 pm

1 stop13h 18m

$485

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Mon 11/24

12:11 pm-12:59 am

1 stop11h 48m

Santiago de los Caballeros

Sun 12/7

6:35 am-7:19 pm

1 stop13h 44m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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2
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Best time to book a flight from Dulles Intl to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros 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 Santiago de los Caballeros

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

Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros (average of $347). Flying from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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 STI?

Find hourly flight availability from Dulles Intl to Santiago de los Caballeros. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 13, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros in the afternoon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Santiago de los Caballeros

Get insights into the airlines that provide service to Santiago de los Caballeros. 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 Santiago de los Caballeros. Reviews last updated September 13, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,934 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,934 reviews
United Airlines
7.4
Good
8,934 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

    For a flight from Washington, D.C. Dulles Intl to Santiago de los Caballeros, you will be flying into Santiago. Santiago de los Caballeros (STI) is just 6.8 mi from the center of the city. Santiago is the only Santiago de los Caballeros airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to Santiago de los Caballeros from Washington, D.C. Dulles Intl on a regular basis.

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

    For as low as $467, Delta can have you in Santiago de los Caballeros from Washington, D.C. Dulles Intl Airport in 11h 48m. The distance from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros is about 1410 mi.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros round-trip from $488. United Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Santiago de los Caballeros 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 Santiago de los Caballeros?

    Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros (average of $347). Flying from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Dulles Intl to Santiago de los Caballeros

Discover the top airline that operate flights from Dulles Intl to Santiago de los Caballeros. 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 September 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$488Average$710FlexibilityNo cancel feeOn-time69%

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