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Santiago de los Caballeros

$206+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STI
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$404
(FlightHub)

One-way from

$206
(Mytrip)

Popular in

July

Cheapest in

November

Average price

$844
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. 17% potential increase in price ($143 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This FlightHub deal was found by Cheapflights users on 7/28. 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.
Sun 8/1712:31 pmIAD - STI
1 stop24h 20mFrontier
Thu 8/211:26 pmSTI - IAD
2 stops31h 22mFrontier
Deal found 7/28$404
This Delta deal was found by Cheapflights users on 7/27. 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.
Tue 9/912:13 pmIAD - STI
1 stop7h 11mDelta
Tue 9/166:11 amSTI - IAD
1 stop13h 26mDelta
Deal found 7/27$465
This American Airlines deal was found by Cheapflights users on 7/29. 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 9/185:26 pmIAD - STI
2 stops19h 01mAmerican Airlines
Thu 9/251:29 pmSTI - IAD
2 stops22h 49mAmerican Airlines
Deal found 7/29$469
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Thu 9/188:25 amIAD - STI
3 stops26h 40mMultiple Airlines
Sun 9/2112:10 pmSTI - IAD
2 stops21h 49mMultiple Airlines
Deal found 7/29$475
This United Airlines deal was found by Cheapflights users on 7/28. 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 9/198:40 amIAD - STI
1 stop6h 32mUnited Airlines
Sun 9/284:23 pmSTI - IAD
1 stop7h 36mUnited Airlines
Deal found 7/28$615

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 July 29, 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 8/17

12:31 pm-12:51 pm

1 stop24h 20m

Santiago de los Caballeros

Thu 8/21

1:26 pm-8:48 pm

2 stops31h 22m

$404

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 9/9

12:13 pm-7:24 pm

1 stop7h 11m

Santiago de los Caballeros

Tue 9/16

6:11 am-7:37 pm

1 stop13h 26m

$465

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 9/18

5:26 pm-12:27 pm

2 stops19h 01m

Santiago de los Caballeros

Thu 9/25

1:29 pm-12:18 pm

2 stops22h 49m

$469

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 9/18

8:25 am-11:05 am

3 stops26h 40m

Santiago de los Caballeros

Sun 9/21

12:10 pm-9:59 am

2 stops21h 49m

$475

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 9/19

8:40 am-3:12 pm

1 stop6h 32m

Santiago de los Caballeros

Sun 9/28

4:23 pm-11:59 pm

1 stop7h 36m

$615

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sun 8/31

4:56 pm-9:15 am

2 stops16h 19m

$206

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 9/2

12:13 pm-7:24 pm

1 stop7h 11m

$281

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sat 8/16

8:19 pm-12:31 pm

2 stops16h 12m

$481

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sat 8/16

10:15 pm-12:57 pm

2 stops14h 42m

$1,704

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 $612). 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 July 29, 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 July 29, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,238 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying 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 $404. Other airlines that can offer you cheap pricing are Delta, from $465, and American Airlines, from $469. Frontier is priced at 39% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros one-way?

    One-way options have recently been found by users for as low as $281 on Delta. Other airlines that offer cheap prices include American Airlines from $481 and United Airlines from $1,704 one-way.

  • 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 $612). 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

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$488Average$711FlexibilityNo cancel feeOn-time69%

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