HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Santiago de los Caballeros

$137+ Cheap flights from Reagan-National (DCA) 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — STI
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Reagan-National 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.

Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Santiago de los Caballeros are usually found in March or January, booked 27 days in advance, depart on a Sunday or Friday and return on a Saturday

Cheap flight deals from Reagan-National to Santiago de los Caballeros

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) 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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$410
(JetBlue)

One-way from

$137
(SmartFares)

Popular in

December

Cheapest in

March

Average price

$575
Provider with most accurate pricing for Washington, D.C. Reagan-National-Santiago de los Caballeros flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Santiago de los Caballeros flights.
Search Deals
From Washington, D.C. Reagan-National to Santiago de los Caballeros
Search Deals
One-way flight from Washington, D.C. Reagan-National to Santiago de los Caballeros
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Reagan-National to Santiago de los Caballeros

Cheapest flights from Reagan-National to Santiago de los Caballeros
Explore the most affordable flight options available from Reagan-National to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This Expedia deal was found by Cheapflights users on 10/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:24 amDCA - STI
1 stop15h 48mJetBlue
Sat 11/2211:18 pmSTI - DCA
1 stop16h 32mJetBlue
Deal found 10/23$410
This Expedia deal was found by Cheapflights users on 10/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:05 amDCA - STI
1 stop20h 14mJetBlue
Sun 11/237:01 amSTI - DCA
1 stop8h 49mJetBlue
Deal found 10/23$411
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/174:55 pmDCA - STI
1 stop9h 03mJetBlue
Sun 12/76:01 amSTI - DCA
1 stop10h 59mJetBlue
Deal found 10/22$412
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:51 pmDCA - STI
1 stop12h 06mJetBlue
Wed 12/317:00 amSTI - DCA
1 stop11h 58mJetBlue
Deal found 10/22$415
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:55 pmDCA - STI
1 stop9h 03mJetBlue
Mon 11/106:05 amSTI - DCA
1 stop9h 31mJetBlue
Deal found 10/22$416
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:55 pmDCA - STI
1 stop9h 03mJetBlue
Wed 12/36:01 amSTI - DCA
1 stop8h 03mJetBlue
Deal found 10/22$418
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:00 pmDCA - STI
1 stop11h 19mJetBlue
Tue 12/1610:11 amSTI - DCA
1 stop9h 44mJetBlue
Deal found 10/22$422
This Expedia deal was found by Cheapflights users on 10/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:55 pmDCA - STI
1 stop9h 03mJetBlue
Sun 11/94:41 amSTI - DCA
1 stop10h 55mJetBlue
Deal found 10/21$424
This SmartFares deal was found by Cheapflights users on 10/22. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:00 pmDCA - STI
1 stop11h 19mJetBlue
Fri 10/318:29 amSTI - DCA
1 stop27h 56mJetBlue
Deal found 10/22$430
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:00 pmDCA - STI
1 stop11h 19mJetBlue
Thu 12/1811:47 amSTI - DCA
1 stop7h 48mJetBlue
Deal found 10/22$431
This JetBlue deal was found by Cheapflights users on 10/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/255:43 pmDCA - STI
1 stop8h 53mJetBlue
Fri 12/59:44 amSTI - DCA
1 stop8h 20mJetBlue
Deal found 10/20$433
This JetBlue deal was found by Cheapflights users on 10/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:00 pmDCA - STI
1 stop11h 19mJetBlue
Sat 12/1310:11 amSTI - DCA
1 stop13h 18mJetBlue
Deal found 10/22$440

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 October 23, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros that are best for you.

Fly from

Reagan-National

Fly to

Santiago de los Caballeros

Route

Depart

Return

Price

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sun 11/16

8:00 am-4:15 pm

1 stop7h 15m

Santiago de los Caballeros

Sun 12/7

6:01 am-1:09 pm

1 stop8h 08m

$410

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Wed 1/7

7:55 pm-4:31 am

1 stop7h 36m

Santiago de los Caballeros

Mon 1/26

5:10 am-5:35 pm

1 stop13h 25m

$412

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Fri 1/9

8:55 pm-4:31 am

1 stop6h 36m

Santiago de los Caballeros

Mon 1/26

5:10 am-5:35 pm

1 stop13h 25m

$412

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Thu 1/8

7:55 pm-4:31 am

1 stop7h 36m

Santiago de los Caballeros

Mon 1/26

5:10 am-1:19 pm

1 stop9h 09m

$412

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Mon 11/17

4:55 pm-2:58 am

1 stop9h 03m

Santiago de los Caballeros

Sun 12/7

6:01 am-4:00 pm

1 stop10h 59m

$412

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Thu 11/6

4:55 pm-2:58 am

1 stop9h 03m

Santiago de los Caballeros

Wed 12/3

6:01 am-1:04 pm

1 stop8h 03m

$418

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Mon 11/10

6:24 am-8:34 pm

1 stop13h 10m

Santiago de los Caballeros

Wed 12/3

6:01 am-2:44 pm

1 stop9h 43m

$418

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sat 11/22

8:00 pm-8:19 am

1 stop11h 19m

Santiago de los Caballeros

Tue 12/16

10:11 am-6:55 pm

1 stop9h 44m

$422

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sat 11/22

8:00 pm-8:19 am

1 stop11h 19m

Santiago de los Caballeros

Wed 12/17

10:11 am-6:55 pm

1 stop9h 44m

$422

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sat 11/22

8:00 pm-8:19 am

1 stop11h 19m

Santiago de los Caballeros

Mon 12/15

9:44 am-5:04 pm

1 stop8h 20m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 22 results
1
2
3

Compare providers for flights from Reagan-National 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 Reagan-National to Santiago de los Caballeros in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 Washington, D.C. Reagan-National Airport-Santiago de los Caballeros flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Santiago de los Caballeros flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National 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. Reagan-National Airport-Santiago de los Caballeros 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 Washington, D.C. Reagan-National 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 Reagan-National to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros from Reagan-National 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. Reagan-National Airport to Santiago de los Caballeros

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros?

Use this chart to determine the optimal time to book a round-trip flight from Reagan-National to Santiago de los Caballeros. Price data was last updated on October 17, 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros, you should look to book at least 26 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros (average of $244). Flying from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros in January is currently the most expensive (average of $467). 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 DCA to STI?

Find hourly flight availability from Reagan-National 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 October 23, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 20% on flights from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros by exploring options for tickets 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 October 23, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,982 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,995 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,033 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
JetBlue
7.2
Good
2,908 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National 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. Reagan-National?

    Most people fly into Santiago de los Caballeros (STI) if they book a flight to Santiago de los Caballeros from Washington, D.C. Reagan-National. On average, Santiago has 0 inbound flights from Washington, D.C. Reagan-National per day from 4 airlines. Santiago de los Caballeros is conveniently located just 6.8 mi from Santiago de los Caballeros’s city center.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros?

    There are many flights that can get you from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros in 7h 15m. Fly via JetBlue to get the fastest option. Airlines will cover a distance of 1397 mi.

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

    According to our current data, JetBlue ($427), Delta ($483), and American Airlines ($484) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros. You may be able to fly from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros for 30% less than the average price by searching for these airlines.

  • Can I find deals for flights from Reagan-National to Santiago de los Caballeros that include hotel bookings?

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

  • How can I find direct flights from Reagan-National 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 Reagan-National to Santiago de los Caballeros.

  • Can I find deals for business class flights from Reagan-National to Santiago de los Caballeros?

    Yes. Cheapflights offers flight deals from Reagan-National 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. Reagan-National Airport to Santiago de los Caballeros?

    Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros (average of $244). Flying from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros in January is currently the most expensive (average of $467). 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

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

Top 4 airlines flying from Reagan-National to Santiago de los Caballeros

Discover the top 4 airlines that operate flights from Reagan-National 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$427Average$543FlexibilityNo cancel feeOn-time62%
DeltaCheapest$483Average$599FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$484Average$616FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$518Average$722FlexibilityNo cancel feeOn-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.