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Argentina

$576+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/2. 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 12/511:10 amSTL - EZE
1 stop17h 10mUnited Airlines
Tue 12/910:05 pmEZE - STL
1 stop20h 59mUnited Airlines
Deal found 12/2$1,491
This LATAM Airlines deal was found by Cheapflights users on 12/2. 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.
Fri 12/56:00 amSTL - AEP
2 stops31h 00mLATAM Airlines
Tue 12/93:40 pmAEP - STL
2 stops22h 05mLATAM Airlines
Deal found 12/2$1,625
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/84:45 pmSTL - EZE
1 stop13h 35mUnited Airlines
Fri 12/1210:05 pmEZE - STL
1 stop14h 59mUnited Airlines
Deal found 12/3$1,708
This Travelocity deal was found by Cheapflights users on 12/3. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:13 pmSTL - EZE
1 stop35h 07mLATAM Airlines
Thu 1/111:55 pmEZE - STL
1 stop26h 47mLATAM Airlines
Deal found 12/3$1,916
This eDestinos deal was found by Cheapflights users on 12/3. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:00 amSTL - EZE
3 stops35h 45mMultiple Airlines
Thu 1/812:00 pmEZE - STL
2 stops29h 42mMultiple Airlines
Deal found 12/3$1,918
This Delta deal was found by Cheapflights users on 12/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/138:00 amSTL - EZE
1 stop20h 20mDelta
Sat 1/108:55 pmEZE - STL
1 stop14h 58mDelta
Deal found 12/4$2,039
This Expedia deal was found by Cheapflights users on 12/3. 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 12/2012:55 pmSTL - EZE
2 stops17h 40mMultiple Airlines
Wed 12/313:30 amEZE - STL
2 stops22h 05mMultiple Airlines
Deal found 12/3$2,069
This LATAM Airlines deal was found by Cheapflights users on 12/4. 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.
Mon 12/81:57 pmSTL - EZE
2 stops25h 46mLATAM Airlines
Fri 12/1211:55 pmEZE - STL
1 stop21h 05mLATAM Airlines
Deal found 12/4$2,098
This KAYAK deal was found by Cheapflights users on 12/3. 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 12/2012:55 pmSTL - AEP
2 stops18h 35mLATAM Airlines
Thu 1/13:40 pmAEP - STL
2 stops20h 18mLATAM Airlines
Deal found 12/3$2,362
This Mytrip deal was found by Cheapflights users on 12/2. 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.
Sun 12/215:02 pmSTL - AEP
3 stops33h 38mMultiple Airlines
Sun 1/47:00 amAEP - STL
2 stops35h 29mMultiple Airlines
Deal found 12/2$2,682
This Travelocity deal was found by Cheapflights users on 12/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:00 amSTL - AEP
2 stops25h 30mLATAM Airlines
Sun 1/48:50 amAEP - STL
2 stops29h 05mLATAM Airlines
Deal found 12/2$3,033
This Mytrip deal was found by Cheapflights users on 12/2. 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.
Sat 12/205:02 pmSTL - AEP
3 stops33h 38mMultiple Airlines
Sun 1/47:00 amAEP - STL
2 stops35h 29mMultiple Airlines
Deal found 12/2$3,371

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 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,048
(FlightHub)

One-way from

$576
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,345
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 ($56 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 4, 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

10:02 am-7:20 am

1 stop19h 18m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-11:45 am

1 stop16h 50m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 1/8

6:00 am-9:20 am

1 stop24h 20m

Buenos Aires Ministro Pistarini

Mon 1/26

11:55 pm-3:52 pm

1 stop18h 57m

$1,101

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

4:42 pm-9:20 am

1 stop13h 38m

Buenos Aires Ministro Pistarini

Sat 1/24

10:05 pm-9:22 am

1 stop14h 17m

$1,181

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/27

1:30 pm-9:45 am

1 stop18h 15m

Buenos Aires Ministro Pistarini

Mon 6/8

8:10 pm-3:58 pm

1 stop21h 48m

$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

Sat 1/17

5:00 pm-6:40 pm

2 stops22h 40m

Buenos Aires Jorge Newbery

Sun 1/25

11:30 am-11:04 am

2 stops26h 34m

$1,383

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

Sat 1/24

5:15 pm-8:53 am

2 stops18h 38m

$1,391

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sat 1/3

9:47 am-7:55 am

2 stops19h 08m

Buenos Aires Jorge Newbery

Sun 1/11

5:15 pm-8:53 am

2 stops18h 38m

$1,556

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 1/2

9:47 am-7:55 am

2 stops19h 08m

Buenos Aires Jorge Newbery

Sun 1/11

5:15 pm-8:53 am

2 stops18h 38m

$1,556

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 25 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 4, 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 4, 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
8,011 reviews

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

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
8,011 reviews

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

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
9,063 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

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
11,043 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

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. 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 2 airlines flying from St. Louis to Argentina

Discover the top 2 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,025Average$1,377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,081Average$1,406FlexibilityNo cancel feeOn-time69%

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