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$380+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$1,020
(Justfly.com)

One-way from

$380
(Avianca)

Popular in

October

Cheapest in

June

Average price

$1,103
From Lambert-St Louis to Argentina
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One-way flight from Lambert-St Louis to Argentina
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Highest demand for flights based on searches. 17% potential increase in price ($273 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($79 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This Justfly.com deal was found by Cheapflights users on 6/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/181:26 pmSTL - AEP
2 stops20h 34mLATAM Airlines
Mon 9/155:00 pmAEP - STL
2 stops27h 02mLATAM Airlines
Deal found 6/10$1,020
This Justfly.com deal was found by Cheapflights users on 6/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/93:30 pmSTL - EZE
2 stops18h 17mLATAM Airlines
Thu 10/237:40 amEZE - STL
2 stops17h 59mLATAM Airlines
Deal found 6/12$1,020
This Delta deal was found by Cheapflights users on 6/9. 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.
Wed 11/53:30 pmSTL - EZE
1 stop14h 30mDelta
Wed 11/197:35 pmEZE - STL
2 stops20h 21mDelta
Deal found 6/9$1,025
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/1810:15 amSTL - EZE
1 stop19h 45mUnited Airlines
Mon 8/259:00 pmEZE - STL
2 stops26h 32mUnited Airlines
Deal found 6/11$1,030
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/185:22 amSTL - EZE
1 stop24h 03mAmerican Airlines
Mon 8/2510:30 pmEZE - STL
2 stops19h 44mAmerican Airlines
Deal found 6/11$1,041
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/181:30 pmSTL - EZE
3 stops47h 00mAir Canada
Mon 9/154:35 pmEZE - STL
2 stops29h 03mAir Canada
Deal found 6/10$1,111
This Mytrip deal was found by Cheapflights users on 6/9. 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.
Wed 11/510:30 amSTL - EZE
3 stops29h 15mMultiple Airlines
Wed 11/197:10 amEZE - STL
2 stops37h 04mMultiple Airlines
Deal found 6/9$1,299
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:15 pmSTL - AEP
2 stops28h 05mMultiple Airlines
Tue 11/183:00 amAEP - STL
2 stops39h 26mMultiple Airlines
Deal found 6/9$1,308
This Copa Airlines deal was found by Cheapflights users on 6/11. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/188:00 amSTL - EZE
2 stops21h 54mCopa Airlines
Sun 8/243:47 amEZE - STL
2 stops32h 15mCopa Airlines
Deal found 6/11$1,421
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Wed 11/54:15 pmSTL - AEP
2 stops21h 55mAir Canada
Mon 11/171:35 pmAEP - STL
2 stops28h 51mAir Canada
Deal found 6/9$1,506
This eDestinos deal was found by Cheapflights users on 6/12. 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 12/135:25 amSTL - EZE
2 stops27h 55mGOL
Fri 1/93:15 amEZE - STL
2 stops21h 33mGOL
Deal found 6/12$2,598

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 June 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

Mon 8/18

1:26 pm-12:00 pm

2 stops20h 34m

Buenos Aires Jorge Newbery

Mon 9/15

5:00 pm-6:02 pm

2 stops27h 02m

$1,020

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/18

11:02 am-6:10 am

2 stops17h 08m

Buenos Aires Ministro Pistarini

Sun 9/14

3:55 am-11:39 pm

2 stops21h 44m

$1,025

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/18

10:00 am-8:00 am

2 stops20h 00m

Buenos Aires Ministro Pistarini

Mon 8/25

9:00 pm-9:32 pm

2 stops26h 32m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/18

5:22 am-7:25 am

1 stop24h 03m

Buenos Aires Ministro Pistarini

Mon 8/25

10:30 pm-4:14 pm

2 stops19h 44m

$1,041

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 9/4

6:00 am-5:55 am

2 stops21h 55m

Buenos Aires Ministro Pistarini

Fri 9/12

8:10 pm-2:36 pm

1 stop20h 26m

$1,065

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/18

1:30 pm-2:30 pm

3 stops47h 00m

Buenos Aires Ministro Pistarini

Mon 9/15

4:35 pm-7:38 pm

2 stops29h 03m

$1,111

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 6/16

11:28 am-3:25 am

3 stops37h 57m

Buenos Aires Ministro Pistarini

Wed 6/18

4:35 pm-7:58 pm

2 stops29h 23m

$1,326

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 7/27

5:26 pm-4:05 pm

3 stops44h 39m

Buenos Aires Jorge Newbery

Tue 8/12

9:00 am-3:21 pm

2 stops32h 21m

$1,351

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/18

8:00 am-7:54 am

2 stops21h 54m

Buenos Aires Ministro Pistarini

Sun 8/24

3:47 am-10:02 am

2 stops32h 15m

$1,421

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 8/5

10:00 am-5:45 am

2 stops17h 45m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 14 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 June 12, 2025.

When flying from St. Louis to Argentina, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Argentina by month

Plan your trip to Argentina by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Argentina ranges from 2.0 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. June is typically the driest time to visit Argentina when rainfall is around 2.0 in.

Temperature in Argentina by month

Plan your trip to Argentina by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Argentina, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LATAM Airlines
7.5
Good
1,785 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.5
Good
1,451 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines to fly from St. Louis to Argentina one-way?

    The cheapest airlines for a one-way flight from St. Louis to Argentina are Lufthansa ($726), Delta ($988), and United Airlines ($1,002).

  • 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.

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

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Argentina (average of $795). Flying from St. Louis to Argentina in December is currently the most expensive (average of $1,260). 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,023Average$1,283FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,025Average$1,238FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,053Average$1,223FlexibilityNo cancel feeOn-time69%

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