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$828+ Cheap flights from St. Louis (STL) to Santiago (SCL)

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SCL
feb. 19 — feb. 261
jue. 2/19
jue. 2/26
1 adult, Economy
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Cheap flight deals from St. Louis to Santiago

Cheapest flights from St. Louis to Santiago
Explore the most affordable flight options available from St. Louis to Santiago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 20, 2026.

This LATAM Airlines deal was found by Cheapflights users on 1/18. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/46:00 am
STL
-
SCL
2 stops20h 35m
LATAM Airlines
mar. 3/1012:20 am
SCL
-
STL
2 stops19h 33m
LATAM Airlines
Deal found 1/18$828
This United Airlines deal was found by Cheapflights users on 1/19. 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.
mié. 3/116:00 am
STL
-
SCL
1 stop23h 50m
United Airlines
lun. 3/239:45 pm
SCL
-
STL
1 stop26h 31m
United Airlines
Deal found 1/19$846
This KAYAK deal was found by Cheapflights users on 1/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/38:50 am
STL
-
SCL
1 stop21h 00m
Multiple Airlines
sáb. 11/1410:45 pm
SCL
-
STL
1 stop13h 57m
Multiple Airlines
Deal found 1/18$848
This Air Canada deal was found by Cheapflights users on 1/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/44:05 pm
STL
-
SCL
1 stop17h 10m
Air Canada
mié. 3/117:55 pm
SCL
-
STL
1 stop21h 34m
Air Canada
Deal found 1/18$852
This United Airlines deal was found by Cheapflights users on 1/18. 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.
lun. 3/24:28 pm
STL
-
SCL
1 stop13h 22m
United Airlines
lun. 3/239:45 pm
SCL
-
STL
1 stop13h 36m
United Airlines
Deal found 1/18$858
This LATAM Airlines deal was found by Cheapflights users on 1/19. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/511:55 am
STL
-
SCL
3 stops23h 35m
LATAM Airlines
jue. 3/124:35 am
SCL
-
STL
2 stops21h 23m
LATAM Airlines
Deal found 1/19$863
This KAYAK deal was found by Cheapflights users on 1/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/39:00 am
STL
-
SCL
2 stops18h 00m
LATAM Airlines
sáb. 11/145:40 am
SCL
-
STL
2 stops20h 59m
LATAM Airlines
Deal found 1/18$865
This KAYAK deal was found by Cheapflights users on 1/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/1810:13 am
STL
-
SCL
1 stop18h 27m
LATAM Airlines
mar. 2/2411:10 pm
SCL
-
STL
1 stop14h 52m
LATAM Airlines
Deal found 1/20$873
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/189:55 am
STL
-
SCL
2 stops19h 55m
United Airlines
mar. 2/2410:45 pm
SCL
-
STL
2 stops18h 44m
United Airlines
Deal found 1/20$878
This LATAM Airlines deal was found by Cheapflights users on 1/18. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/206:59 pm
STL
-
SCL
2 stops24h 36m
LATAM Airlines
lun. 3/3011:00 pm
SCL
-
STL
2 stops20h 53m
LATAM Airlines
Deal found 1/18$895

Find flight deals from St. Louis to Santiago

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Santiago (SCL). 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 enero 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$828
(LATAM Airlines)

Popular in

January

Cheapest in

March

Average price

$1,647
Provider with most accurate pricing for Lambert-St Louis-Santiago Arturo Merino Benitez flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Santiago Arturo Merino Benitez flights.
Search Deals
From Lambert-St Louis to Santiago Arturo Merino Benitez
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($214 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Santiago 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 enero 20, 2026.
Use the filters below to find and compare flights from St. Louis to Santiago that are best for you.

Fly from

St. Louis

Fly to

Santiago

Route

Depart

Return

Price

St. LouisSantiago

STL - SCL

STLSCL

Lambert-St Louis

mié. 3/4

6:00 am-5:35 am

2 stops20h 35m

Santiago Arturo Merino Benitez

mié. 3/11

10:10 pm-9:05 am

1 stop12h 55m

$828

St. LouisSantiago

STL - SCL

STLSCL

Lambert-St Louis

mié. 3/11

4:47 pm-7:50 am

1 stop13h 03m

Santiago Arturo Merino Benitez

lun. 3/23

9:45 pm-9:21 am

1 stop13h 36m

$846

St. LouisSantiago

STL - SCL

STLSCL

Lambert-St Louis

mié. 3/4

4:05 pm-12:15 pm

1 stop17h 10m

Santiago Arturo Merino Benitez

mié. 3/11

7:55 pm-3:29 pm

1 stop21h 34m

$852

St. LouisSantiago

STL - SCL

STLSCL

Lambert-St Louis

lun. 3/2

4:28 pm-8:50 am

1 stop13h 22m

Santiago Arturo Merino Benitez

lun. 3/23

9:45 pm-9:21 am

1 stop13h 36m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Compare providers for flights from St. Louis to Santiago

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 in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 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 flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Santiago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Santiago flights, Cheapflights users trust Expedia the most. Expedia 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 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

Have a flexible travel schedule? Discover the best time to fly to Santiago 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

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

Currently, March is the cheapest month in which you can book a flight from St. Louis to Santiago (average of $591). Flying from St. Louis to Santiago in June is currently the most expensive (average of $989). 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

Get insights into the airlines that provide service to Santiago. 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. Reviews last updated enero 20, 2026.
Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and American Airlines from St. Louis to Santiago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,081 reviews

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,081 reviews
Delta
7.9
Good
8,081 reviews

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
LATAM Airlines
7.5
Good
1,913 reviews
Delta
7.9
Good
8,081 reviews

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,169 reviews
Delta
7.9
Good
8,081 reviews

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

    Airlines like LATAM Airlines and United Airlines fly from St. Louis to Santiago in about 13h 03m. The time it takes to get you to your destination can typically vary by up to 7h 32m. The distance between St. Louis and Santiago is about 5137 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 round-trip?

    Flying on American Airlines is currently your cheapest option to Santiago, with prices starting at $689. Additional round-trip tickets that might be worth considering are offered by Delta and LATAM Airlines, with the lowest prices starting at $755 and $803, respectively. These flights start at 33% lower than the current average price 3 months from now.

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

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

  • How can I find direct flights from St. Louis to Santiago?

    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.

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

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

    Currently, March is the cheapest month in which you can book a flight from St. Louis to Santiago (average of $591). Flying from St. Louis to Santiago in June is currently the most expensive (average of $989). 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

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Alternative routes for St. Louis to Santiago

See prices for flight routes from nearby airports that may be better suited for you.
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Kansas City to Balmaceda flights
St. Louis to Easter Island flights

Top 3 airlines flying from St. Louis to Santiago

Discover the top 3 airlines that operate flights from St. Louis to Santiago. 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 enero 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$689Average$898FlexibilityNo cancel feeOn-time71%
DeltaCheapest$755Average$1,013FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$803Average$913FlexibilityNo cancel feeOn-time81%

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