What is the cheapest airline that flies from Lambert-St Louis to Argentina?

Avianca, United Airlines, and Air Canada are the most popular carriers operating from Lambert-St Louis to Argentina

What airlines fly to Argentina?

Delta, LATAM Airlines and American Airlines are the top three most popular airlines that fly to Argentina from St. Louis according to our data. Delta is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Argentina. Keep in mind that there are 3 different airlines that fly to Argentina on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Argentina?

Prices for flights from Lambert-St Louis Airport to Argentina refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Argentina?

There are 3 operators available for flights from Lambert-St Louis Airport to Argentina as of August 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Argentina?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Argentina.

What documentation or ID do you need to fly to Argentina?

The required travel and health documents for your Argentina trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Argentina. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$716 Cheap Flights from St. Louis to Argentina in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Argentina

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:00 am - 7:40 amSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

18h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:35 pm - 8:53 amAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

18h 18m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,148Delta

Wed, Dec 2 - Thu, Dec 17

12:20 pm - 7:35 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 15m1 stop Atlanta Hartsfield-Jackson

5:00 pm - 8:53 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 53m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$1,148LATAM Airlines

Wed, Dec 2 - Thu, Dec 17

10:00 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:00 pm - 11:15 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 15m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$1,148Delta

Wed, Dec 2 - Thu, Dec 17

5:37 pm - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

13h 03m1 stop Atlanta Hartsfield-Jackson

11:35 pm - 11:15 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 40m1 stop Atlanta Hartsfield-Jackson

$1,148LATAM Airlines

Wed, Dec 2 - Thu, Dec 17

10:00 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

7:35 pm - 11:15 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 40m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson

$1,148LATAM Airlines

Wed, Dec 2 - Thu, Dec 17

2:11 pm - 8:30 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 19m1 stop Miami

8:45 pm - 1:21 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 36m1 stop Miami

$1,188American Airlines

Thu, Sep 17 - Thu, Sep 24

2:11 pm - 8:30 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 19m1 stop Miami

10:15 pm - 2:44 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 29m2 stops Miami Dallas/Fort Worth

$1,192American Airlines

Thu, Sep 17 - Thu, Sep 24

5:30 pm - 8:00 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

36h 30m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

9:00 pm - 2:10 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

19h 10m1 stop Houston George Bush Intcntl

$1,192United Airlines

Mon, Sep 21 - Wed, Sep 30

5:30 pm - 8:00 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

36h 30m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

9:00 pm - 9:21 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

26h 21m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$1,192United Airlines

Mon, Sep 21 - Wed, Sep 30

6:54 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

12h 51m1 stop Atlanta Hartsfield-Jackson

4:45 pm - 10:55 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

20h 10m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$1,228Delta

Thu, Sep 17 - Thu, Sep 24

Cheap last minute flights

Enter your travel dates to find the best prices.

9:15 am - 7:40 amSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

20h 25m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

8:05 pm - 2:33 pmAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

20h 28m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,228Delta

Thu, Aug 13 - Thu, Aug 20

5:23 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

14h 22m1 stop Atlanta Hartsfield-Jackson

7:35 am - 11:58 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 23m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,228LATAM Airlines

Thu, Aug 13 - Thu, Aug 20

3:39 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 06m1 stop Atlanta Hartsfield-Jackson

8:10 pm - 11:46 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

17h 36m1 stop Atlanta Hartsfield-Jackson

$1,228Delta

Thu, Aug 13 - Thu, Aug 20

10:22 am - 8:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

20h 23m2 stops Charlotte Douglas Miami

10:30 pm - 5:01 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

20h 31m2 stops Miami Philadelphia

$1,254American Airlines

Thu, Aug 13 - Thu, Aug 20

11:00 am - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

20h 45m1 stop Atlanta Hartsfield-Jackson

8:10 pm - 8:08 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

13h 58m1 stop Atlanta Hartsfield-Jackson

$1,258Delta

Thu, Aug 13 - Sun, Aug 16

12:59 pm - 8:00 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

41h 01m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

9:00 pm - 10:00 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

51h 00m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$1,394United Airlines

Thu, Aug 13 - Sun, Aug 16

5:23 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

14h 22m1 stop Atlanta Hartsfield-Jackson

1:10 pm - 5:50 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

54h 40m2 stops Miami Las Vegas Harry Reid Intl

$1,484Multiple Airlines

Thu, Aug 13 - Sun, Aug 16

6:00 am - 8:30 amSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

24h 30m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

8:05 pm - 11:58 pmAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

29h 53m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,493LATAM Airlines

Thu, Aug 13 - Sun, Aug 16

12:10 pm - 2:30 pmSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

48h 20m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Sao Paulo Guarulhos Intl

3:55 am - 8:08 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

30h 13m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,732Multiple Airlines

Thu, Aug 13 - Wed, Aug 19

12:10 pm - 2:30 pmSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

48h 20m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Sao Paulo Guarulhos Intl

4:35 pm - 6:42 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

52h 07m3 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$2,071Air Canada

Thu, Aug 13 - Thu, Aug 20

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LATAM Airlines flights from St. Louis to Argentina

Our best LATAM Airlines deals on St. Louis to Argentina flight tickets

LATAM Airlines

Jan 16

STL6:00 amLambert-St Louis

22h 35m

1 stop

EZE7:35 amBuenos Aires Ministro Pistarini

Jan 28

EZE11:35 pmBuenos Aires Ministro Pistarini

21h 26m

1 stop

STL6:01 pmLambert-St Louis

$1,172

LATAM Airlines

Jan 16

STL3:40 pmLambert-St Louis

12h 55m

1 stop

EZE7:35 amBuenos Aires Ministro Pistarini

Jan 28

EZE7:20 amBuenos Aires Ministro Pistarini

27h 52m

2 stops

STL8:12 amLambert-St Louis

$1,177

LATAM Airlines

Jan 16

STL6:59 pmLambert-St Louis

35h 51m

2 stops

EZE9:50 amBuenos Aires Ministro Pistarini

Jan 28

EZE7:20 amBuenos Aires Ministro Pistarini

19h 19m

2 stops

STL11:39 pmLambert-St Louis

$1,187

American Airlines flights from St. Louis to Argentina

Our best American Airlines deals on St. Louis to Argentina flight tickets

American Airlines

Sep 17

STL2:11 pmLambert-St Louis

16h 19m

1 stop

EZE8:30 amBuenos Aires Ministro Pistarini

Sep 24

EZE8:45 pmBuenos Aires Ministro Pistarini

18h 36m

1 stop

STL1:21 pmLambert-St Louis

$1,188

American Airlines

Sep 17

STL2:11 pmLambert-St Louis

16h 19m

1 stop

EZE8:30 amBuenos Aires Ministro Pistarini

Sep 24

EZE10:15 pmBuenos Aires Ministro Pistarini

18h 29m

2 stops

STL2:44 pmLambert-St Louis

$1,192

American Airlines

Aug 19

STL12:45 pmLambert-St Louis

18h 00m

2 stops

EZE8:45 amBuenos Aires Ministro Pistarini

Sep 20

EZE10:15 pmBuenos Aires Ministro Pistarini

16h 48m

2 stops

STL1:03 pmLambert-St Louis

$1,232

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 12/2

10:00 am-7:40 am

2 stops18h 40m

Buenos Aires Jorge Newbery

Thu 12/17

5:35 pm-8:53 am

2 stops18h 18m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

12:20 pm-7:35 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Thu 12/17

5:00 pm-8:53 am

2 stops18h 53m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:00 am-6:20 am

2 stops17h 20m

Buenos Aires Ministro Pistarini

Thu 12/17

5:00 pm-11:15 am

2 stops21h 15m

$1,148

Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

5:37 pm-9:40 am

1 stop13h 03m

Buenos Aires Ministro Pistarini

Thu 12/17

11:35 pm-11:15 am

1 stop14h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:00 am-6:20 am

2 stops17h 20m

Buenos Aires Ministro Pistarini

Thu 12/17

7:35 pm-11:15 am

2 stops18h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 9/17

2:11 pm-8:30 am

1 stop16h 19m

Buenos Aires Ministro Pistarini

Thu 9/24

8:45 pm-1:21 pm

1 stop18h 36m

$1,188

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 9/17

2:11 pm-8:30 am

1 stop16h 19m

Buenos Aires Ministro Pistarini

Thu 9/24

10:15 pm-2:44 pm

2 stops18h 29m

$1,192

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 9/21

5:30 pm-8:00 am

2 stops36h 30m

Buenos Aires Ministro Pistarini

Wed 9/30

9:00 pm-2:10 pm

1 stop19h 10m

$1,192

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 9/21

5:30 pm-8:00 am

2 stops36h 30m

Buenos Aires Ministro Pistarini

Wed 9/30

9:00 pm-9:21 pm

2 stops26h 21m

$1,192

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 9/17

6:54 pm-9:45 am

1 stop12h 51m

Buenos Aires Ministro Pistarini

Thu 9/24

4:45 pm-10:55 am

2 stops20h 10m

$1,228

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Argentina

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Argentina?

If you are unable to visit Argentina during the month of September, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around $0.

Can stopping save me money on St. Louis to Argentina flights?

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to Argentina flight.

Cheap St. Louis to Argentina flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Argentina

Fastest flight time	12h 55m
Direct flights	None

The fastest flight from St. Louis to Argentina takes 12h 55m

There are no direct flights from St. Louis to Argentina. There are no popular flight routes from St. Louis to Argentina.

Search flight deals

Frequently asked questions about flying from St. Louis to Argentina

When did momondo last update prices for flights from Lambert-St Louis Airport to Argentina?
Prices for flights from Lambert-St Louis Airport to Argentina refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Argentina?
There are 3 operators available for flights from Lambert-St Louis Airport to Argentina as of August 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Argentina?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Argentina.
What documentation or ID do you need to fly to Argentina?
The required travel and health documents for your Argentina trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Argentina. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from St. Louis to Argentina

Compare and see reviews for airlines that fly from St. Louis to Argentina with momondo

Airline	Rating	Free Cancellation	Price
LATAM Airlines	PriceFrom $884	Free Cancellation	Rating 7.4 1,975 reviews	Search LATAM Airlines flights
Delta	PriceFrom $1,025	Free Cancellation	Rating 7.8 8,496 reviews	Search Delta flights
American Airlines	PriceFrom $1,147	Free Cancellation	Rating 7.1 11,894 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Argentina?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Argentina from St. Louis.

Can I find flights from St. Louis to Argentina with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Argentina flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Argentina?

Once you have performed a search for St. Louis to Argentina flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Argentina right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Argentina flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.