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Argentina

$350+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
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 October 20, 2025.

This KAYAK deal was found by Cheapflights users on 10/20. 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.
Tue 11/185:17 pmSTL - AEP
2 stops19h 43mLATAM Airlines
Wed 11/2610:35 amAEP - STL
2 stops26h 24mLATAM Airlines
Deal found 10/20$830
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/175:17 pmSTL - EZE
1 stop12h 43mDelta
Sun 11/234:05 amEZE - STL
2 stops20h 53mDelta
Deal found 10/19$830
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 11/166:43 pmSTL - EZE
2 stops33h 37mUnited Airlines
Thu 11/2711:55 pmEZE - STL
1 stop18h 55mUnited Airlines
Deal found 10/19$834
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:02 pmSTL - EZE
1 stop34h 58mDelta
Thu 11/2711:55 pmEZE - STL
1 stop21h 40mDelta
Deal found 10/19$837
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:17 pmSTL - EZE
1 stop12h 43mDelta
Wed 11/268:55 pmEZE - STL
1 stop20h 01mDelta
Deal found 10/19$880
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Fri 11/1411:20 amSTL - EZE
1 stop17h 00mUnited Airlines
Mon 11/2410:05 pmEZE - STL
2 stops17h 23mUnited Airlines
Deal found 10/19$884
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 11/164:35 pmSTL - EZE
1 stop35h 45mUnited Airlines
Sun 11/2311:55 pmEZE - STL
1 stop18h 55mUnited Airlines
Deal found 10/19$888
This LATAM Airlines deal was found by Cheapflights users on 10/18. 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.
Sat 11/155:15 pmSTL - AEP
2 stops19h 45mLATAM Airlines
Sat 11/223:40 pmAEP - STL
2 stops22h 03mLATAM Airlines
Deal found 10/18$930
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sat 11/1511:20 amSTL - EZE
1 stop17h 00mUnited Airlines
Sun 11/2311:55 pmEZE - STL
1 stop13h 44mUnited Airlines
Deal found 10/19$930
This United Airlines deal was found by Cheapflights users on 10/18. 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.
Sat 11/1511:20 amSTL - EZE
1 stop17h 00mUnited Airlines
Sat 11/2210:05 pmEZE - STL
2 stops19h 19mUnited Airlines
Deal found 10/18$934
This Expedia deal was found by Cheapflights users on 10/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/151:33 pmSTL - EZE
2 stops28h 22mLATAM Airlines
Fri 11/212:25 amEZE - STL
2 stops35h 18mLATAM Airlines
Deal found 10/18$960
This Priceline deal was found by Cheapflights users on 10/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/291:55 pmSTL - EZE
2 stops25h 48mLATAM Airlines
Wed 12/108:00 amEZE - STL
2 stops16h 57mLATAM Airlines
Deal found 10/18$975

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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$830
(KAYAK)

One-way from

$350
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$1,160
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. 2% potential increase in price ($33 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 October 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 October 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 - AEP

STLAEP

Lambert-St Louis

Tue 11/18

5:17 pm-6:40 pm

2 stops22h 23m

Buenos Aires Jorge Newbery

Wed 11/26

10:35 am-6:35 pm

2 stops35h 00m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 1/20

10:07 am-7:20 am

1 stop18h 13m

Buenos Aires Ministro Pistarini

Tue 2/24

10:05 pm-9:23 am

1 stop14h 18m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/11

1:35 pm-10:15 am

1 stop17h 40m

Buenos Aires Ministro Pistarini

Thu 11/27

10:25 pm-3:50 pm

1 stop20h 25m

$830

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 12/3

2:07 pm-4:00 pm

2 stops22h 53m

Buenos Aires Jorge Newbery

Wed 12/10

3:40 pm-10:45 am

2 stops22h 05m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 11/13

4:30 pm-10:15 am

1 stop14h 45m

Buenos Aires Ministro Pistarini

Tue 11/25

7:50 am-9:58 pm

2 stops17h 08m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

6:00 am-6:20 am

2 stops21h 20m

Buenos Aires Ministro Pistarini

Wed 11/26

7:43 pm-9:59 am

2 stops17h 16m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

9:33 am-9:00 am

1 stop20h 27m

Buenos Aires Ministro Pistarini

Wed 11/26

8:55 pm-1:56 pm

1 stop20h 01m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 11/13

1:55 pm-9:00 am

1 stop16h 05m

Buenos Aires Ministro Pistarini

Mon 11/24

11:55 pm-10:43 am

1 stop13h 48m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 11/12

4:30 pm-10:15 am

1 stop14h 45m

Buenos Aires Ministro Pistarini

Mon 11/24

10:25 pm-12:40 pm

1 stop17h 15m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/11

5:17 pm-9:00 am

1 stop12h 43m

Buenos Aires Ministro Pistarini

Wed 11/26

8:55 pm-9:59 am

1 stop16h 04m

$830

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

Showing 1-10 of 29 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 October 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 October 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
7,978 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,978 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
LATAM Airlines
7.5
Good
1,868 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,991 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,023 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 $830, LATAM Airlines can have you in Argentina from St. Louis in 17h 40m. St. Louis and Argentina are separated by a distance of 5472 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,023Average$1,406FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,023Average$1,287FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,260FlexibilityNo cancel feeOn-timeN/A

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