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

Wednesday flights are generally found to be more expensive for flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Santiago de los Caballeros.

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

Most trusted provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flights, Cheapflights users trust AranGrant the most. AranGrant 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 Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 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.

$166+ Flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Q: What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Q: How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

To save on the cost of your flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros, book at least 41 days before your planned departure. Booking around this time can save you about 87% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $406 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $798.

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Dulles Intl to Santiago de los Caballeros with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to Santiago de los Caballeros

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$362 (CheapOair)
One-way from	$174 (Mytrip)
Popular in	December
Cheapest in	November
Average price	$669

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Santiago de los Caballeros flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Santiago de los Caballeros flights.

Search Deals

From Washington, D.C. Dulles Intl to Santiago de los Caballeros

Search Deals

One-way flight from Washington, D.C. Dulles Intl to Santiago de los Caballeros

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 17, 2025.

Thu 7/312:23 pmIAD - STI

1 stop24h 27mFrontier

Mon 7/72:10 pmSTI - IAD

1 stop21h 43mFrontier

Deal found 4/16

$362

Wed 11/265:10 pmIAD - STI

1 stop7h 16mDelta

Tue 12/26:45 amSTI - IAD

1 stop10h 46mDelta

Deal found 4/16

$465

Wed 9/38:19 pmIAD - STI

2 stops16h 01mAmerican Airlines

Mon 9/81:35 pmSTI - IAD

2 stops8h 17mAmerican Airlines

Deal found 4/16

$469

Tue 6/35:35 pmIAD - STI

1 stop8h 11mUnited Airlines

Wed 6/186:00 amSTI - IAD

1 stop8h 27mUnited Airlines

Deal found 4/16

$489

Fri 6/203:13 pmIAD - STI

2 stops19h 16mMultiple Airlines

Thu 6/2611:29 amSTI - IAD

2 stops21h 54mMultiple Airlines

Deal found 4/17

$600

Best flights from Dulles Intl to Santiago de los Caballeros
Discover carefully curated flight deals from Dulles Intl to Santiago de los Caballeros that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Thu 7/312:23 pmIAD - STI

1 stop24h 27mFrontier

Mon 7/72:10 pmSTI - IAD

1 stop21h 43mFrontier

Deal found 4/16

$362

Tue 6/35:35 pmIAD - STI

1 stop8h 11mUnited Airlines

Wed 6/186:00 amSTI - IAD

1 stop8h 27mUnited Airlines

Deal found 4/16

$489

Mon 4/284:52 pmIAD - STI

2 stops21h 34mAmerican Airlines

Tue 5/203:50 pmSTI - IAD

2 stops21h 32mAmerican Airlines

Deal found 4/16

$554

Sun 6/89:10 pmIAD - STI

3 stops41h 38mMultiple Airlines

Thu 6/1911:29 amSTI - IAD

2 stops26h 54mMultiple Airlines

Deal found 4/16

$660

Last-minute flights from Dulles Intl to Santiago de los Caballeros
Discover last-minute flight deals from Dulles Intl to Santiago de los Caballeros. Data last updated April 17, 2025 and is based on user searches.

Wed 4/238:25 amIAD - STI

3 stops30h 21mMultiple Airlines

Sun 4/273:51 pmSTI - IAD

3 stops24h 24mMultiple Airlines

Deal found 4/16

$828

Fri 4/255:29 pmIAD - STI

1 stop8h 17mUnited Airlines

Fri 5/96:00 amSTI - IAD

1 stop8h 28mUnited Airlines

Deal found 4/16

$646

Sat 4/262:12 pmIAD - STI

2 stops24h 14mAmerican Airlines

Mon 5/53:50 pmSTI - IAD

2 stops27h 42mAmerican Airlines

Deal found 4/17

$933

Mon 4/285:29 pmIAD - STI

1 stop8h 17mUnited Airlines

Tue 5/206:00 amSTI - IAD

1 stop8h 28mUnited Airlines

Deal found 4/16

$514

Mon 4/284:52 pmIAD - STI

2 stops21h 34mAmerican Airlines

Tue 5/203:50 pmSTI - IAD

2 stops21h 32mAmerican Airlines

Deal found 4/16

$554

Mon 4/283:30 pmIAD - STI

2 stops23h 16mMultiple Airlines

Tue 5/203:53 pmSTI - IAD

3 stops19h 27mMultiple Airlines

Deal found 4/16

$815

One-way flights from Dulles Intl to Santiago de los Caballeros
Search for one-way flight options from Dulles Intl to Santiago de los Caballeros. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Sun 6/812:28 pmIAD - STI

1 stop25h 42mFrontier

Deal found 4/17

$174

Fri 6/273:13 pmIAD - STI

2 stops19h 16mMultiple Airlines

Deal found 4/16

$266

Mon 4/2812:11 pmIAD - STI

1 stop6h 30mDelta

Deal found 4/17

$281

Fri 6/65:41 pmIAD - STI

2 stops18h 59mAmerican Airlines

Deal found 4/16

$326

Fri 5/309:00 amIAD - STI

1 stop6h 12mUnited Airlines

Deal found 4/17

$353

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 7/3

12:23 pm-12:50 pm

1 stop24h 27m

Santiago de los Caballeros

Mon 7/7

2:10 pm-11:53 am

1 stop21h 43m

$362

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Wed 9/3

8:19 pm-12:20 pm

2 stops16h 01m

Santiago de los Caballeros

Mon 9/8

1:35 pm-9:52 pm

2 stops8h 17m

$469

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Wed 9/17

5:10 pm-1:13 am

1 stop8h 03m

Santiago de los Caballeros

Mon 9/22

6:20 am-4:31 pm

1 stop10h 11m

$485

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 6/3

5:35 pm-1:46 am

1 stop8h 11m

Santiago de los Caballeros

Wed 6/18

6:00 am-2:27 pm

1 stop8h 27m

$489

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 6/20

3:13 pm-10:29 am

2 stops19h 16m

Santiago de los Caballeros

Thu 6/26

11:29 am-9:23 am

2 stops21h 54m

$600

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 8/12

12:51 pm-12:51 pm

1 stop24h 00m

$166

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 6/27

3:13 pm-10:29 am

2 stops19h 16m

$266

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Mon 4/28

12:11 pm-6:41 pm

1 stop6h 30m

$281

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 6/6

5:41 pm-12:40 pm

2 stops18h 59m

$326

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 5/30

9:00 am-3:12 pm

1 stop6h 12m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Compare providers for flights from Dulles Intl to Santiago de los Caballeros

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Santiago de los Caballeros in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust 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 Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros flights, Cheapflights users trust AranGrant the most. AranGrant 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 Washington, D.C. Dulles Intl Airport-Santiago de los Caballeros 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 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 $631). 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?

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.

Rainfall in Santiago de los Caballeros by month

In terms of precipitation, rainfall in Santiago de los Caballeros ranges from 3.0 - 11.6 inches per month. December is typically the wettest month, when rainfall can reach 11.6 in. July is typically the driest time to visit Santiago de los Caballeros when rainfall is around 3.0 in.

Temperature in Santiago de los Caballeros by month

If weather is an important factor for your trip to Santiago de los Caballeros, use this chart to help with planning. For those seeking warmer temperatures, June 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 73.4 F).

Reviews of airlines servicing Santiago de los Caballeros

See what other customers who have flown with Delta, United Airlines and American Airlines from Washington, D.C. to Santiago de los Caballeros have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,917 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,667 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Frontier

6.0

Okay

3,281 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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 $362. Other airlines that can offer you cheap pricing are United Airlines, from $489, and American Airlines, from $554. Frontier is priced at 48% 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 $174 on Frontier. Other airlines that offer cheap prices include Delta from $281 and American Airlines from $326 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 $631). 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

Top airline flying from Dulles Intl to Santiago de los Caballeros

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$446	Average$701	FlexibilityNo cancel fee	On-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$166+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Santiago de los Caballeros with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Santiago de los Caballeros

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Santiago de los Caballeros

Cheapest flights from Dulles Intl to Santiago de los CaballerosExplore 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 April 17, 2025.

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 April 17, 2025.

Cheapflights Fare Finder

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.

Compare providers for flights from Dulles Intl to Santiago de los Caballeros

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 Dulles Intl to Santiago de los Caballeros in April.

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.

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?

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 April 17, 2025.

Rainfall in Santiago de los Caballeros by month

Plan your trip to Santiago de los Caballeros by taking into account the average rainfall totals by month.

Temperature in Santiago de los Caballeros by month

Plan your trip to Santiago de los Caballeros by taking into account the average temperature totals by month.

Reviews of airlines servicing Santiago de los Caballeros

See what other customers who have flown with Delta, United Airlines and American Airlines from Washington, D.C. to Santiago de los Caballeros have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

How can I 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?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Santiago de los Caballeros

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Dulles Intl to Santiago de los Caballeros

100% Free

Book with Flexibility

Travel Smart

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 April 17, 2025.