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$431+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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Find 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 November 20, 2025.

This Mytrip deal was found by Cheapflights users on 11/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/112:47 pmSTL - EZE
3 stops34h 48mMultiple Airlines
Sat 12/205:35 amEZE - STL
3 stops32h 21mMultiple Airlines
Deal found 11/19$1,182
This United Airlines deal was found by Cheapflights users on 11/18. 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.
Mon 12/811:25 amSTL - EZE
2 stops18h 55mUnited Airlines
Mon 12/2210:05 pmEZE - STL
1 stop14h 44mUnited Airlines
Deal found 11/18$1,200
This LATAM Airlines deal was found by Cheapflights users on 11/18. 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.
Tue 11/185:17 pmSTL - AEP
2 stops22h 23mLATAM Airlines
Wed 11/2610:35 amAEP - STL
2 stops26h 24mLATAM Airlines
Deal found 11/18$1,216
This LATAM Airlines deal was found by Cheapflights users on 11/18. 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.
Tue 11/181:55 pmSTL - EZE
1 stop16h 05mDelta
Wed 11/268:55 pmEZE - STL
1 stop20h 01mDelta
Deal found 11/18$1,216
This LATAM Airlines deal was found by Cheapflights users on 11/18. 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.
Tue 12/165:12 pmSTL - EZE
1 stop12h 48mDelta
Tue 12/2311:55 pmEZE - STL
1 stop19h 33mDelta
Deal found 11/18$1,226
This LATAM Airlines deal was found by Cheapflights users on 11/18. 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.
Tue 12/166:00 amSTL - EZE
2 stops25h 15mLATAM Airlines
Tue 12/2311:55 pmEZE - STL
1 stop19h 33mLATAM Airlines
Deal found 11/18$1,230
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:30 amSTL - EZE
2 stops17h 35mLATAM Airlines
Sat 12/208:55 pmEZE - STL
1 stop15h 03mLATAM Airlines
Deal found 11/19$1,233
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Thu 12/116:15 amSTL - EZE
1 stop22h 05mUnited Airlines
Sat 12/2010:05 pmEZE - STL
1 stop14h 44mUnited Airlines
Deal found 11/19$1,236
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2311:08 amSTL - EZE
3 stops39h 02mMultiple Airlines
Tue 11/2511:25 pmEZE - STL
1 stop18h 08mMultiple Airlines
Deal found 11/19$1,258
This Mytrip deal was found by Cheapflights users on 11/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:05 pmSTL - AEP
3 stops34h 35mMultiple Airlines
Mon 12/225:10 pmAEP - STL
2 stops20h 46mMultiple Airlines
Deal found 11/18$1,263
This American Airlines deal was found by Cheapflights users on 11/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:53 amSTL - EZE
2 stops18h 12mAmerican Airlines
Tue 12/2311:20 pmEZE - STL
2 stops17h 49mAmerican Airlines
Deal found 11/18$1,280
This KAYAK deal was found by Cheapflights users on 11/20. 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.
Sat 12/131:35 pmSTL - AEP
2 stops22h 05mLATAM Airlines
Thu 12/182:55 pmAEP - STL
2 stops20h 29mLATAM Airlines
Deal found 11/20$1,493

Cheap 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 November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,018
(KAYAK)

One-way from

$431
(Kiwi.com)

Popular in

August

Cheapest in

September

Average price

$1,355
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. 1% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 20, 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 - EZE

STLEZE

Lambert-St Louis

Tue 2/17

7:10 am-9:00 am

1 stop22h 50m

Buenos Aires Ministro Pistarini

Tue 3/10

8:55 pm-9:04 am

1 stop14h 09m

$1,026

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

6:45 pm-7:20 am

2 stops33h 35m

Buenos Aires Ministro Pistarini

Thu 3/12

9:05 pm-4:05 pm

1 stop21h 00m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

6:45 pm-7:20 am

2 stops33h 35m

Buenos Aires Ministro Pistarini

Mon 3/9

9:05 pm-9:21 am

1 stop14h 16m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

6:45 pm-7:20 am

2 stops33h 35m

Buenos Aires Ministro Pistarini

Tue 3/10

9:05 pm-5:44 pm

2 stops22h 39m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

4:00 pm-9:35 am

2 stops15h 35m

Buenos Aires Ministro Pistarini

Tue 3/17

7:45 am-11:40 pm

2 stops17h 55m

$1,048

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 3/8

4:00 pm-9:40 am

2 stops15h 40m

Buenos Aires Jorge Newbery

Tue 3/17

5:15 pm-11:50 am

2 stops20h 35m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/16

6:00 am-7:20 am

1 stop22h 20m

Buenos Aires Ministro Pistarini

Sat 3/7

9:05 pm-8:21 am

1 stop14h 16m

$1,066

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 1/23

3:45 pm-4:00 pm

2 stops21h 15m

Buenos Aires Jorge Newbery

Fri 1/30

5:15 pm-8:53 am

2 stops18h 38m

$1,098

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sat 1/17

5:00 pm-4:00 pm

2 stops20h 00m

Buenos Aires Jorge Newbery

Sun 1/25

5:15 pm-8:53 am

2 stops18h 38m

$1,201

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Mon 12/8

4:05 pm-5:40 am

3 stops34h 35m

Buenos Aires Jorge Newbery

Mon 12/22

6:15 am-10:56 am

3 stops31h 41m

$1,216

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 19 results
1
2

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 November 20, 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 November 20, 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
8,002 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.3

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
8,002 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.3

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
1,882 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.3

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
9,027 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.3

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
11,045 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.3

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, Delta can have you in Argentina from St. Louis in 15h 40m. St. Louis and Argentina are separated by a distance of 5458 mi. This flight may include one or multiple stops.

  • 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 3 airlines flying from St. Louis to Argentina

Discover the top 3 airlines 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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,023Average$1,287FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,025Average$1,291FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,081Average$1,406FlexibilityNo cancel feeOn-time69%

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