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Santiago de los Caballeros

$193+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — STI
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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 September 17, 2025.

Round-trip from

$392
(SmartFares)

One-way from

$193
(Priceline)

Popular in

December

Cheapest in

March

Average price

$564
From Washington, D.C. Reagan-National to Santiago de los Caballeros
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One-way flight from Washington, D.C. Reagan-National to Santiago de los Caballeros
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Highest demand for flights based on searches. 5% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This SmartFares deal was found by Cheapflights users on 9/17. 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.
Sun 10/268:00 amDCA - STI
1 stop7h 13mJetBlue
Fri 10/313:43 amSTI - DCA
1 stop11h 07mJetBlue
Deal found 9/17$392
This Expedia deal was found by Cheapflights users on 9/16. 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.
Mon 12/87:51 pmDCA - STI
1 stop12h 06mJetBlue
Sun 2/85:15 amSTI - DCA
1 stop10h 19mJetBlue
Deal found 9/16$393
This Expedia deal was found by Cheapflights users on 9/16. 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 10/165:20 pmDCA - STI
1 stop9h 01mJetBlue
Thu 10/232:00 pmSTI - DCA
1 stop7h 59mJetBlue
Deal found 9/16$407
This Expedia deal was found by Cheapflights users on 9/16. 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 10/236:25 amDCA - STI
1 stop7h 48mJetBlue
Mon 10/275:07 amSTI - DCA
1 stop9h 43mJetBlue
Deal found 9/16$409
This Expedia deal was found by Cheapflights users on 9/17. 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 11/14:55 pmDCA - STI
1 stop9h 03mJetBlue
Sat 11/87:11 amSTI - DCA
1 stop8h 39mJetBlue
Deal found 9/17$411
This JetBlue deal was found by Cheapflights users on 9/17. 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.
Fri 9/266:19 amDCA - STI
1 stop8h 01mJetBlue
Thu 10/210:10 amSTI - DCA
1 stop8h 34mJetBlue
Deal found 9/17$422
This Expedia deal was found by Cheapflights users on 9/16. 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 10/46:15 amDCA - STI
1 stop20h 01mJetBlue
Tue 10/710:10 amSTI - DCA
1 stop9h 10mJetBlue
Deal found 9/16$428
This JetBlue deal was found by Cheapflights users on 9/15. 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 11/226:56 pmDCA - STI
1 stop12h 23mJetBlue
Sat 12/610:11 amSTI - DCA
1 stop13h 18mJetBlue
Deal found 9/15$431
This JetBlue deal was found by Cheapflights users on 9/15. 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 11/124:55 pmDCA - STI
1 stop9h 03mJetBlue
Mon 11/245:05 amSTI - DCA
1 stop10h 54mJetBlue
Deal found 9/15$433

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 September 17, 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 10/26

8:00 am-3:13 pm

1 stop7h 13m

Santiago de los Caballeros

Fri 10/31

3:43 am-2:50 pm

1 stop11h 07m

$392

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Thu 10/23

6:25 am-2:13 pm

1 stop7h 48m

Santiago de los Caballeros

Mon 10/27

5:07 am-2:50 pm

1 stop9h 43m

$409

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Mon 12/8

3:55 pm-8:57 am

1 stop16h 02m

Santiago de los Caballeros

Sat 2/7

4:51 am-10:57 pm

1 stop19h 06m

$420

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sun 2/22

6:00 pm-8:15 am

1 stop13h 15m

Santiago de los Caballeros

Thu 2/26

9:25 am-4:52 pm

1 stop8h 27m

$420

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sat 10/4

6:15 am-2:16 am

1 stop20h 01m

Santiago de los Caballeros

Tue 10/7

10:10 am-7:20 pm

1 stop9h 10m

$428

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sat 11/22

6:56 pm-8:19 am

1 stop12h 23m

Santiago de los Caballeros

Sat 12/6

10:11 am-10:29 pm

1 stop13h 18m

$431

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Fri 11/14

4:55 pm-2:58 am

1 stop9h 03m

Santiago de los Caballeros

Wed 11/26

7:01 am-2:59 pm

1 stop8h 58m

$433

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Thu 11/13

6:24 am-3:38 pm

1 stop8h 14m

Santiago de los Caballeros

Wed 11/26

7:01 am-2:59 pm

1 stop8h 58m

$433

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sun 11/16

4:55 pm-2:58 am

1 stop9h 03m

Santiago de los Caballeros

Mon 11/24

5:05 am-2:59 pm

1 stop10h 54m

$433

Washington, D.C.Santiago de los Caballeros

DCA - STI

DCASTI

Washington, D.C. Reagan-National

Sun 11/16

4:55 pm-2:58 am

1 stop9h 03m

Santiago de los Caballeros

Wed 11/26

5:05 am-2:59 pm

1 stop10h 54m

$433

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 19 results
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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 September 12, 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, May 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 $347). Flying from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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 September 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 21% on flights from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros by exploring options for tickets in the morning.

How much does it cost to fly round-trip from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros?

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 September 17, 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
8.0
Very good
7,961 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
7,961 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
JetBlue
7.2
Good
2,914 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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 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 13m. 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 32% 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, May 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 $347). Flying from Washington, D.C. Reagan-National Airport to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$427Average$572FlexibilityNo cancel feeOn-time62%
DeltaCheapest$483Average$599FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$484Average$626FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$518Average$754FlexibilityNo cancel feeOn-time69%

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