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

Copa Airlines and LATAM Airlines are the most popular carriers operating from Lambert-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 2 operators available for flights from Lambert-St Louis Airport to Argentina as of November 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.

$518 Cheap Flights from St. Louis to Argentina in 2026/27

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.

7:20 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

21h 00m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

7:20 am - 11:39 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 19m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,268LATAM Airlines

Wed, Apr 14 - Thu, May 13

1:30 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

18h 15m1 stop Atlanta Hartsfield-Jackson

7:20 am - 11:39 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

18h 19m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,268LATAM Airlines

Tue, Apr 20 - Mon, May 17

3:40 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 05m1 stop Atlanta Hartsfield-Jackson

8:10 pm - 2:28 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

20h 18m1 stop Atlanta Hartsfield-Jackson

$1,268Delta

Thu, Apr 15 - Tue, May 18

3:40 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

16h 05m1 stop Atlanta Hartsfield-Jackson

8:10 pm - 3:58 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 48m1 stop Atlanta Hartsfield-Jackson

$1,268Delta

Mon, Apr 19 - Mon, May 17

10:00 am - 8:50 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

20h 50m1 stop Miami

10:20 pm - 5:37 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 17m1 stop Miami

$1,268American Airlines

Mon, Apr 19 - Sun, May 16

5:15 pm - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

14h 30m1 stop Atlanta Hartsfield-Jackson

12:15 pm - 6:01 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

31h 46m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson

$1,268LATAM Airlines

Thu, Apr 15 - Wed, May 19

11:51 am - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

19h 54m1 stop Atlanta Hartsfield-Jackson

8:10 pm - 10:48 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

16h 38m1 stop Atlanta Hartsfield-Jackson

$1,268Delta

Tue, Apr 20 - Mon, May 17

11:51 am - 9:45 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

19h 54m1 stop Atlanta Hartsfield-Jackson

5:00 pm - 10:48 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

19h 48m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$1,268LATAM Airlines

Wed, Apr 14 - Tue, May 18

9:13 am - 7:15 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

20h 02m2 stops Charlotte Douglas Miami

8:45 pm - 9:20 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 35m1 stop Miami

$1,272American Airlines

Mon, Apr 19 - Sun, May 16

4:56 pm - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

13h 44m1 stop Atlanta Hartsfield-Jackson

11:35 pm - 1:43 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

17h 08m1 stop Atlanta Hartsfield-Jackson

$1,308Multiple Airlines

Thu, Jan 28 - Sat, Mar 13

Cheap last minute flights

Enter your travel dates to find the best prices.

4:05 pm - 6:05 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

35h 00m2 stops Toronto Pearson Intl Bogotá El Dorado

1:40 am - 3:26 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

40h 46m2 stops Bogotá El Dorado Toronto Pearson Intl

$4,909Multiple Airlines

Mon, Nov 9 - Sun, Nov 22

7:18 pm - 10:55 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

36h 37m2 stops Atlanta Hartsfield-Jackson New York LaGuardia

8:05 pm - 11:56 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

30h 51m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson

$6,018LATAM Airlines

Tue, Nov 10 - Tue, Nov 24

10:05 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 15m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

9:30 pm - 4:43 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

22h 13m1 stop Atlanta Hartsfield-Jackson

$6,074LATAM Airlines

Tue, Nov 10 - Tue, Nov 24

10:05 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 15m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

9:30 pm - 11:15 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

16h 45m1 stop Atlanta Hartsfield-Jackson

$6,074LATAM Airlines

Tue, Nov 10 - Mon, Nov 23

10:05 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 15m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

11:35 pm - 10:20 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

13h 45m1 stop Atlanta Hartsfield-Jackson

$6,228LATAM Airlines

Thu, Nov 12 - Thu, Nov 26

7:18 pm - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

32h 02m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

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

14h 40m1 stop Atlanta Hartsfield-Jackson

$6,250Delta

Mon, Nov 9 - Mon, Nov 23

2:55 pm - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

15h 25m1 stop Houston George Bush Intcntl

10:05 pm - 4:50 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 45m1 stop Houston George Bush Intcntl

$6,353United Airlines

Thu, Nov 12 - Sat, Nov 21

8:30 am - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

21h 50m1 stop Houston George Bush Intcntl

10:05 pm - 10:02 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 57m1 stop Houston George Bush Intcntl

$6,353United Airlines

Thu, Nov 12 - Mon, Nov 23

6:15 am - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

24h 05m1 stop Houston George Bush Intcntl

11:55 pm - 2:13 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

17h 18m1 stop Houston George Bush Intcntl

$6,353United Airlines

Thu, Nov 12 - Sun, Nov 22

2:55 pm - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

15h 25m1 stop Houston George Bush Intcntl

10:05 pm - 2:13 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

19h 08m1 stop Houston George Bush Intcntl

$6,353United Airlines

Thu, Nov 12 - Thu, Nov 26

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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

Mar 19

STL6:00 amLambert-St Louis

22h 20m

2 stops

EZE6:20 amBuenos Aires Ministro Pistarini

Apr 8

EZE7:20 amBuenos Aires Ministro Pistarini

18h 19m

2 stops

STL11:39 pmLambert-St Louis

$1,308

LATAM Airlines

Jan 28

STL4:56 pmLambert-St Louis

13h 44m

1 stop

EZE9:40 amBuenos Aires Ministro Pistarini

Mar 13

EZE12:20 pmBuenos Aires Ministro Pistarini

31h 41m

2 stops

STL5:01 pmLambert-St Louis

$1,312

LATAM Airlines

Dec 31

STL9:00 amLambert-St Louis

19h 40m

2 stops

AEP7:40 amBuenos Aires Jorge Newbery

Jan 14

AEP5:35 pmBuenos Aires Jorge Newbery

25h 59m

2 stops

STL4:34 pmLambert-St Louis

$1,318

American Airlines flights from St. Louis to Argentina

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

American Airlines

Dec 6

STL10:35 amLambert-St Louis

19h 30m

1 stop

EZE9:05 amBuenos Aires Ministro Pistarini

Dec 13

EZE10:50 pmBuenos Aires Ministro Pistarini

21h 35m

1 stop

STL5:25 pmLambert-St Louis

$1,398

American Airlines

Mar 28

STL12:21 pmLambert-St Louis

16h 54m

1 stop

EZE7:15 amBuenos Aires Ministro Pistarini

Apr 10

EZE10:20 pmBuenos Aires Ministro Pistarini

21h 17m

1 stop

STL5:37 pmLambert-St Louis

$1,522

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 4/14

7:20 am-6:20 am

2 stops21h 00m

Buenos Aires Ministro Pistarini

Thu 5/13

7:20 am-11:39 pm

2 stops18h 19m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 4/20

1:30 pm-9:45 am

1 stop18h 15m

Buenos Aires Ministro Pistarini

Mon 5/17

7:20 am-11:39 pm

2 stops18h 19m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 4/15

3:40 pm-9:45 am

1 stop16h 05m

Buenos Aires Ministro Pistarini

Tue 5/18

8:10 pm-2:28 pm

1 stop20h 18m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 4/19

3:40 pm-9:45 am

1 stop16h 05m

Buenos Aires Ministro Pistarini

Mon 5/17

8:10 pm-3:58 pm

1 stop21h 48m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 4/19

10:00 am-8:50 am

1 stop20h 50m

Buenos Aires Ministro Pistarini

Sun 5/16

10:20 pm-5:37 pm

1 stop21h 17m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 4/15

5:15 pm-9:45 am

1 stop14h 30m

Buenos Aires Ministro Pistarini

Wed 5/19

12:15 pm-6:01 pm

2 stops31h 46m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 4/20

11:51 am-9:45 am

1 stop19h 54m

Buenos Aires Ministro Pistarini

Mon 5/17

8:10 pm-10:48 am

1 stop16h 38m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 4/14

11:51 am-9:45 am

1 stop19h 54m

Buenos Aires Ministro Pistarini

Tue 5/18

5:00 pm-10:48 am

2 stops19h 48m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 4/19

9:13 am-7:15 am

2 stops20h 02m

Buenos Aires Ministro Pistarini

Sun 5/16

8:45 pm-9:20 am

1 stop14h 35m

$1,272

Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 1/28

4:56 pm-9:40 am

1 stop13h 44m

Buenos Aires Ministro Pistarini

Sat 3/13

11:35 pm-1:43 pm

1 stop17h 08m

$1,308

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 June, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $1,185.

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

You could potentially save up to 12% 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

Best Price Found	$518
Fastest flight time	12h 35m
Direct flights	None

The best one-way flight to Argentina from St. Louis in the past 72 hours is $518. The best round-trip flight deal from St. Louis to Argentina found on momondo in the last 72 hours is $1,268.

The fastest flight from St. Louis to Argentina takes 12h 35m

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 2 operators available for flights from Lambert-St Louis Airport to Argentina as of November 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
Delta	PriceFrom $431	Free Cancellation	Rating 7.8 8,698 reviews		Search Delta flights
LATAM Airlines	PriceFrom $1,037	Free Cancellation	Rating 7.4 1,972 reviews		Search LATAM 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.