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Santiago de los Caballeros

$539+ Cheap flights from St. Louis (STL) to Santiago de los Caballeros (STI)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — STI
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Find cheap flights from St. Louis to Santiago de los Caballeros with Cheapflights

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Cheap flight deals from St. Louis to Santiago de los Caballeros

Cheapest flights from St. Louis to Santiago de los Caballeros
Explore the most affordable flight options available from St. Louis to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.

This American Airlines deal was found by Cheapflights users on 2/9. 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.
Thu 5/285:15 am
STL
-
STI
1 stop14h 58m
American Airlines
Tue 6/29:06 am
STI
-
STL
1 stop14h 52m
American Airlines
Deal found 2/9$539
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Thu 4/166:55 pm
STL
-
STI
2 stops16h 28m
American Airlines
Tue 4/211:32 pm
STI
-
STL
1 stop9h 52m
American Airlines
Deal found 2/9$543
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 3/1711:22 am
STL
-
STI
1 stop8h 07m
American Airlines
Wed 3/257:00 am
STI
-
STL
1 stop17h 58m
American Airlines
Deal found 2/9$548
This American Airlines deal was found by Cheapflights users on 2/9. 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 2/216:53 pm
STL
-
STI
2 stops16h 38m
American Airlines
Sat 2/282:31 pm
STI
-
STL
2 stops20h 24m
American Airlines
Deal found 2/9$643

Find flight deals from St. Louis to Santiago de los Caballeros

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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 February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$539
(United Airlines)
Provider with most accurate pricing for Lambert-St Louis-Santiago de los Caballeros flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Santiago de los Caballeros flights.
Search Deals
From Lambert-St Louis to Santiago de los Caballeros
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 February 12, 2026.
Use the filters below to find and compare flights from St. Louis to Santiago de los Caballeros that are best for you.

Fly from

St. Louis

Fly to

Santiago de los Caballeros

Route

Depart

Return

Price

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/28

5:15 am-9:13 pm

1 stop14h 58m

Santiago de los Caballeros

Tue 6/2

9:06 am-10:58 pm

1 stop14h 52m

$539

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 3/17

10:50 am-11:54 pm

2 stops12h 04m

Santiago de los Caballeros

Wed 3/25

6:33 am-4:32 pm

2 stops10h 59m

$543

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 4/16

6:55 pm-12:23 pm

2 stops16h 28m

Santiago de los Caballeros

Tue 4/21

1:32 pm-8:24 am

2 stops19h 52m

$543

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 3/17

11:22 am-8:29 pm

1 stop8h 07m

Santiago de los Caballeros

Wed 3/25

7:00 am-11:58 pm

1 stop17h 58m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Compare providers for flights from St. Louis 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 St. Louis to Santiago de los Caballeros in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 St. Louis-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 St. Louis-Santiago de los Caballeros flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Santiago de los Caballeros flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-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 St. Louis-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 St. Louis to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros from St. Louis 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 St. Louis to Santiago de los Caballeros

What is the cheapest month to book a flight from St. Louis to Santiago de los Caballeros?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Santiago de los Caballeros (average of $320). Flying from St. Louis to Santiago de los Caballeros in July is currently the most expensive (average of $676). 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.

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 February 12, 2026.
Get a feel of what it's like to fly with United Airlines and American Airlines from St. Louis to Santiago de los Caballeros by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,276 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,276 reviews
United Airlines
7.4
Good
9,276 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,267 reviews
United Airlines
7.4
Good
9,276 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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.

  • How long is the flight from St. Louis to Santiago de los Caballeros?

    A quick flight from St. Louis to Santiago de los Caballeros can take about 12h 04m. American Airlines provides one of the quickest options available for as low as $543. Airlines will cover a distance of 1782 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Santiago de los Caballeros round-trip?

    According to our current data, American Airlines ($524), and United Airlines ($538) offers the cheapest pricing from St. Louis to Santiago de los Caballeros.

  • Can I find deals for flights from St. Louis to Santiago de los Caballeros that include hotel bookings?

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

  • How can I find direct flights from St. Louis 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 St. Louis to Santiago de los Caballeros.

  • Can I find deals for business class flights from St. Louis to Santiago de los Caballeros?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Santiago de los Caballeros?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Santiago de los Caballeros (average of $320). Flying from St. Louis to Santiago de los Caballeros in July is currently the most expensive (average of $676). 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 2 airlines flying from St. Louis to Santiago de los Caballeros

Discover the top 2 airlines that operate flights from St. Louis 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 February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$524Average$699FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$538Average$609FlexibilityNo cancel feeOn-time69%

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