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Dulles Intl

$194+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
STI — IAD
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
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Cheap 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 julio 29, 2025.

Round-trip from

$442
(FlightHub)

One-way from

$194
(FlightHub)
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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Find 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 julio 29, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/12:06 pmSTI - IAD
2 stops33h 13mFrontier
dom. 8/312:24 pmIAD - STI
1 stop24h 27mFrontier
Deal found 7/27$442
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/276:45 amSTI - IAD
1 stop13h 26mDelta
mié. 12/314:15 pmIAD - STI
1 stop6h 44mDelta
Deal found 7/28$494
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.
mié. 9/171:29 pmSTI - IAD
2 stops19h 17mAmerican Airlines
lun. 9/297:21 pmIAD - STI
2 stops17h 06mAmerican Airlines
Deal found 7/29$518
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/1510:20 amSTI - IAD
2 stops26h 32mMultiple Airlines
sáb. 8/2311:11 amIAD - STI
1 stop25h 05mMultiple Airlines
Deal found 7/26$588
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.
vie. 8/82:07 pmSTI - IAD
1 stop8h 20mUnited Airlines
lun. 8/118:20 amIAD - STI
1 stop6h 52mUnited Airlines
Deal found 7/28$804

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 julio 29, 2025.
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

vie. 8/1

2:06 pm-11:19 pm

2 stops33h 13m

Washington, D.C. Dulles Intl

dom. 8/3

12:24 pm-12:51 pm

1 stop24h 27m

$442

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

mar. 9/16

6:11 am-7:37 pm

1 stop13h 26m

Washington, D.C. Dulles Intl

mar. 10/14

12:09 pm-7:06 pm

1 stop6h 57m

$494

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

mié. 9/17

1:29 pm-8:46 am

2 stops19h 17m

Washington, D.C. Dulles Intl

lun. 9/29

7:21 pm-12:27 pm

2 stops17h 06m

$518

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

vie. 8/15

10:20 am-12:52 pm

2 stops26h 32m

Washington, D.C. Dulles Intl

sáb. 8/23

11:11 am-12:16 pm

1 stop25h 05m

$588

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

vie. 8/8

2:07 pm-10:27 pm

1 stop8h 20m

Washington, D.C. Dulles Intl

lun. 8/11

8:20 am-3:12 pm

1 stop6h 52m

$804

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

lun. 8/4

2:06 pm-11:56 am

1 stop21h 50m

$194

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

sáb. 8/16

10:20 am-10:14 am

2 stops23h 54m

$277

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

jue. 8/14

7:00 am-11:59 pm

2 stops16h 59m

$373

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

jue. 8/14

2:07 pm-10:28 pm

1 stop8h 21m

$520

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

mar. 8/19

8:55 pm-12:02 pm

1 stop15h 07m

$539

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, July 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 $306). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 STI to IAD?

Find hourly flight availability from Santiago de los Caballeros to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 29, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 42% on flights from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport by exploring options for tickets at noon.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated julio 29, 2025.
Read through reviews of airlines operating flights from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport, 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
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Frontier
5.9
Fair
3,238 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport round-trip?

    Frontier, at $442, was found to be the cheapest airline from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Delta and American Airlines.

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

    The cheapest airlines for a one-way flight from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport are Frontier ($194), American Airlines ($373), and United Airlines ($520).

  • 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, July 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 $306). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

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