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Dulles Intl

$292+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
STI — IAD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$596
(United Airlines)

One-way from

$292
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$524
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.
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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
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 13% potential price decrease ($74 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/202:07 pmSTI - IAD
1 stop8h 53mUnited Airlines
Sun 10/197:00 amIAD - STI
1 stop8h 12mUnited Airlines
Deal found 3/26$596
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Sat 9/201:35 pmSTI - IAD
2 stops19h 12mAmerican Airlines
Sun 10/195:06 amIAD - STI
2 stops31h 11mAmerican Airlines
Deal found 3/26$669

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 March 26, 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

Sat 9/20

2:07 pm-11:00 pm

1 stop8h 53m

Washington, D.C. Dulles Intl

Sun 10/19

7:00 am-3:12 pm

1 stop8h 12m

$596

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Sat 9/20

1:35 pm-8:47 am

2 stops19h 12m

Washington, D.C. Dulles Intl

Sun 10/19

5:06 am-12:17 pm

2 stops31h 11m

$669

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Thu 5/15

3:53 pm-4:36 pm

2 stops24h 43m

$292

Santiago de los CaballerosWashington, D.C.

STI - IAD

STIIAD

Santiago de los Caballeros

Thu 5/15

6:00 am-2:28 pm

1 stop8h 28m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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, August 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 $309). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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 March 26, 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.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 March 26, 2025.
United Airlines
7.4
Good
8,608 reviews

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
United Airlines
7.4
Good
8,608 reviews
United Airlines
7.4
Good
8,608 reviews

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,608 reviews

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!

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?

    United Airlines, at $596, was found to be the cheapest airline from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport. An alternate airline flying to your destination would be American Airlines.

  • 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, August 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 $309). Flying from Santiago de los Caballeros to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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 Santiago de los Caballeros?

Book flights to Santiago de los Caballeros if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Tysons
Springfield
Rockville
Woodbridge
Gaithersburg
Fredericksburg
Linthicum Heights
Silver Spring
Falls Church
Laurel
Easton
Herndon
Sterling
Bowie
Gettysburg
National Harbor
Oxon Hill

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