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Argentina

$361+ Cheap flights from St. Louis (STL) to Argentina

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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from St. Louis to Argentina

Cheapest flights from St. Louis to Argentina
Explore the most affordable flight options available from St. Louis to Argentina. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This KAYAK deal was found by Cheapflights users on 12/10. 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.
Tue 12/166:00 amSTL - AEP
3 stops26h 45mLATAM Airlines
Wed 12/173:40 pmAEP - STL
2 stops22h 05mLATAM Airlines
Deal found 12/10$1,480
This KAYAK deal was found by Cheapflights users on 12/11. 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.
Fri 12/126:00 amSTL - EZE
2 stops21h 05mLATAM Airlines
Thu 12/1811:55 pmEZE - STL
1 stop13h 59mLATAM Airlines
Deal found 12/11$1,483
This KAYAK deal was found by Cheapflights users on 12/10. 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.
Tue 12/162:02 pmSTL - EZE
2 stops16h 33mLATAM Airlines
Wed 12/177:43 pmEZE - STL
2 stops18h 02mLATAM Airlines
Deal found 12/10$1,484
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/1210:00 amSTL - EZE
2 stops18h 20mUnited Airlines
Thu 12/1810:05 pmEZE - STL
1 stop14h 44mUnited Airlines
Deal found 12/11$1,495
This SmartFares deal was found by Cheapflights users on 12/11. 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.
Mon 12/151:57 pmSTL - EZE
2 stops37h 08mLATAM Airlines
Wed 12/177:43 pmEZE - STL
2 stops18h 02mLATAM Airlines
Deal found 12/11$1,539
This KAYAK deal was found by Cheapflights users on 12/11. 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.
Mon 12/151:57 pmSTL - AEP
2 stops24h 03mLATAM Airlines
Wed 12/173:40 pmAEP - STL
2 stops22h 05mLATAM Airlines
Deal found 12/11$1,545
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/159:54 amSTL - EZE
2 stops20h 06mMultiple Airlines
Wed 12/1711:25 pmEZE - STL
1 stop18h 22mMultiple Airlines
Deal found 12/11$1,560
This KAYAK deal was found by Cheapflights users on 12/11. 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.
Fri 12/129:30 amSTL - AEP
2 stops19h 25mLATAM Airlines
Thu 12/183:40 pmAEP - STL
2 stops22h 14mLATAM Airlines
Deal found 12/11$1,601
This KAYAK deal was found by Cheapflights users on 12/10. 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.
Tue 12/169:30 amSTL - EZE
2 stops17h 50mLATAM Airlines
Sat 12/207:43 pmEZE - STL
2 stops19h 38mLATAM Airlines
Deal found 12/10$1,645
This American Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/125:10 amSTL - EZE
1 stop22h 55mAmerican Airlines
Thu 12/1810:30 pmEZE - STL
1 stop19h 34mAmerican Airlines
Deal found 12/11$1,666
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Tue 12/166:15 amSTL - EZE
1 stop22h 05mUnited Airlines
Sat 12/2010:05 pmEZE - STL
1 stop14h 44mUnited Airlines
Deal found 12/10$1,708
This KAYAK deal was found by Cheapflights users on 12/10. 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.
Tue 12/166:00 amSTL - AEP
2 stops22h 55mLATAM Airlines
Sat 12/203:40 pmAEP - STL
2 stops23h 41mLATAM Airlines
Deal found 12/10$1,833

Find flight deals from St. Louis to Argentina

Keep the following information in mind while searching for St. Louis to Argentina flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,022
(KAYAK)

One-way from

$361
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,337
Provider with most accurate pricing for Lambert-St Louis-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Buenos Aires (BUE) flights.
Search Deals
From Lambert-St Louis to Argentina
Search Deals
One-way flight from Lambert-St Louis to Argentina
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Argentina 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 December 12, 2025.
Use the filters below to find and compare flights from St. Louis to Argentina that are best for you.

Fly from

St. Louis

Fly to

Argentina

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 3/8

6:59 pm-5:00 pm

2 stops20h 01m

Buenos Aires Jorge Newbery

Tue 3/17

11:30 am-11:45 am

2 stops26h 15m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

3:58 pm-7:20 am

1 stop13h 22m

Buenos Aires Ministro Pistarini

Tue 3/17

4:05 am-11:42 pm

2 stops21h 37m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 1/8

3:45 pm-7:20 am

1 stop12h 35m

Buenos Aires Ministro Pistarini

Mon 1/26

8:55 pm-4:07 pm

1 stop22h 12m

$1,160

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 1/7

6:00 am-7:20 am

1 stop22h 20m

Buenos Aires Ministro Pistarini

Wed 1/14

11:55 pm-11:05 am

1 stop14h 10m

$1,176

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 1/7

9:59 am-6:05 am

2 stops17h 06m

Buenos Aires Ministro Pistarini

Wed 1/14

8:55 pm-8:53 am

1 stop14h 58m

$1,176

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 1/8

12:00 pm-10:15 am

2 stops19h 15m

Buenos Aires Ministro Pistarini

Mon 1/26

10:25 pm-4:37 pm

2 stops21h 12m

$1,180

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 5/27

11:51 am-7:40 am

2 stops17h 49m

Buenos Aires Jorge Newbery

Mon 6/8

5:05 pm-10:45 am

2 stops19h 40m

$1,226

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/27

5:30 pm-9:45 am

1 stop14h 15m

Buenos Aires Ministro Pistarini

Mon 6/8

8:10 pm-2:37 pm

1 stop20h 27m

$1,234

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

5:00 pm-2:55 pm

2 stops18h 55m

Buenos Aires Ministro Pistarini

Sun 1/25

12:15 pm-11:04 am

2 stops25h 49m

$1,248

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 1/8

12:00 pm-9:40 am

2 stops18h 40m

Buenos Aires Jorge Newbery

Mon 1/26

5:15 pm-8:53 am

2 stops18h 38m

$1,310

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 26 results
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Best time to book a flight from St. Louis to Argentina

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

What is the cheapest time of day to fly from STL to AR?

Find hourly flight availability from St. Louis to Argentina. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from St. Louis to Argentina is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 29% on airfare.

Reviews of airlines servicing Argentina

Get insights into the airlines that provide service to Argentina. 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 Argentina. Reviews last updated December 12, 2025.
Get a feel of what it's like to fly with Delta, LATAM Airlines, and United Airlines from St. Louis to Argentina by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
8,009 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
1,889 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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.
United Airlines
7.4
Good
9,095 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
11,048 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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 Argentina. 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 from for flights from St. Louis to Argentina?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Argentina. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Argentina?

    For as low as $1,058, LATAM Airlines can have you in Argentina from St. Louis in 20h 01m. St. Louis and Argentina are separated by a distance of 5458 mi.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Argentina.

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

    Yes. Cheapflights offers flight deals from St. Louis to Argentina by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for St. Louis to Argentina

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from St. Louis to Argentina

Discover the top airline that operate flights from St. Louis to Argentina. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,025Average$1,377FlexibilityNo cancel feeOn-timeN/A

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