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$1,013+ Cheap flights from St. Louis (STL) to Argentina

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,013
(American Airlines)

Popular in

November

Cheapest in

August

Average price

$1,175
Provider with most accurate pricing for Lambert-St Louis-Buenos Aires (BUE) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Buenos Aires (BUE) flights.
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From Lambert-St Louis to Argentina
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Highest demand for flights based on searches. 7% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This American Airlines deal was found by Cheapflights users on 4/16. 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 6/92:49 pmSTL - EZE
1 stop17h 26mAmerican Airlines
Mon 6/239:15 pmEZE - STL
1 stop19h 04mAmerican Airlines
Deal found 4/16$1,013
This LATAM Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 9/103:30 pmSTL - AEP
2 stops22h 30mLATAM Airlines
Wed 9/175:00 pmAEP - STL
2 stops19h 40mLATAM Airlines
Deal found 4/17$1,025
This LATAM Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 9/103:30 pmSTL - EZE
2 stops18h 18mLATAM Airlines
Wed 9/177:35 amEZE - STL
2 stops18h 04mLATAM Airlines
Deal found 4/17$1,025
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 9/105:30 pmSTL - EZE
2 stops36h 30mUnited Airlines
Wed 9/179:00 pmEZE - STL
1 stop23h 58mUnited Airlines
Deal found 4/17$1,030
This Air Canada deal was found by Cheapflights users on 4/16. 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 5/71:30 pmSTL - EZE
2 stops23h 00mAir Canada
Wed 5/214:35 pmEZE - STL
3 stops29h 23mAir Canada
Deal found 4/16$1,032
This Delta deal was found by Cheapflights users on 4/15. 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 6/151:30 pmSTL - EZE
1 stop18h 15mDelta
Tue 6/248:10 pmEZE - STL
1 stop14h 13mDelta
Deal found 4/15$1,065
This lastminute.com deal was found by Cheapflights users on 4/16. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/98:10 amSTL - EZE
2 stops22h 04mCopa Airlines
Sun 6/2212:06 amEZE - STL
2 stops21h 31mCopa Airlines
Deal found 4/16$1,131
This Mytrip deal was found by Cheapflights users on 4/16. 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 5/78:25 amSTL - EZE
2 stops28h 55mMultiple Airlines
Tue 5/202:30 amEZE - STL
2 stops32h 45mMultiple Airlines
Deal found 4/16$1,162
This Mytrip deal was found by Cheapflights users on 4/16. 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 6/110:10 amSTL - AEP
3 stops32h 15mMultiple Airlines
Sun 6/84:55 amAEP - STL
3 stops33h 41mMultiple Airlines
Deal found 4/16$1,357
This FlightHub deal was found by Cheapflights users on 4/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:31 amSTL - AEP
2 stops29h 29mGOL
Tue 9/163:40 amAEP - STL
2 stops21h 21mGOL
Deal found 4/17$1,452
This eDestinos deal was found by Cheapflights users on 4/17. 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 12/134:35 pmSTL - EZE
2 stops16h 45mGOL
Fri 1/93:15 amEZE - STL
2 stops21h 33mGOL
Deal found 4/17$2,603

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 April 17, 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

Mon 6/9

2:49 pm-10:15 am

1 stop17h 26m

Buenos Aires Ministro Pistarini

Mon 6/23

9:15 pm-2:19 pm

1 stop19h 04m

$1,013

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 9/10

3:30 pm-4:00 pm

2 stops22h 30m

Buenos Aires Jorge Newbery

Wed 9/17

5:00 pm-10:40 am

2 stops19h 40m

$1,025

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 9/10

3:30 pm-9:45 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Wed 9/17

8:10 pm-10:40 am

1 stop16h 30m

$1,025

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 9/10

5:30 pm-8:00 am

2 stops36h 30m

Buenos Aires Ministro Pistarini

Wed 9/17

9:00 pm-6:58 pm

1 stop23h 58m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/7

1:30 pm-2:30 pm

2 stops23h 00m

Buenos Aires Ministro Pistarini

Wed 5/21

4:35 pm-7:58 pm

3 stops29h 23m

$1,032

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 9/4

11:51 am-5:55 am

2 stops16h 04m

Buenos Aires Ministro Pistarini

Fri 9/12

7:40 am-10:40 am

2 stops29h 00m

$1,070

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 6/9

8:10 am-8:14 am

2 stops22h 04m

Buenos Aires Ministro Pistarini

Sun 6/22

12:06 am-7:37 pm

2 stops21h 31m

$1,131

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/7

8:25 am-3:20 pm

2 stops28h 55m

Buenos Aires Ministro Pistarini

Tue 5/20

2:30 am-9:15 am

2 stops32h 45m

$1,162

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 6/1

10:10 am-8:25 pm

3 stops32h 15m

Buenos Aires Jorge Newbery

Sun 6/8

4:55 am-12:36 pm

3 stops33h 41m

$1,357

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 9/10

5:31 am-1:00 pm

2 stops29h 29m

Buenos Aires Jorge Newbery

Tue 9/16

3:40 am-11:01 pm

2 stops21h 21m

$1,452

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 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.

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 April 17, 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 April 17, 2025.
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Copa Airlines
7.6
Good
1,409 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
LATAM Airlines
7.5
Good
1,761 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
GOL
7.3
Good
1,059 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,023Average$1,263FlexibilityNo 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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