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

Avianca, Delta, and LATAM Airlines 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 39% 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.

$368 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.

2:29 pm - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 11m2 stops Atlanta Hartsfield-Jackson Miami

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

26h 00m2 stops Miami Atlanta Hartsfield-Jackson

$1,035Multiple Airlines

Mon, Sep 14 - Sun, Sep 20

2:40 pm - 3:00 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

34h 20m3 stops Toronto Pearson Intl Cancun Punta Cana

6:00 am - 2:00 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

34h 00m3 stops Punta Cana Cancun Toronto Pearson Intl

$1,091Multiple Airlines

Mon, Sep 21 - Mon, Sep 28

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

10:04 am - 7:40 amSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

18h 36m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:35 pm - 8:56 amAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

18h 21m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,148Delta

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

11:35 pm - 4:32 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

19h 57m1 stop Atlanta Hartsfield-Jackson

$1,148LATAM Airlines

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

2:54 pm - 8:30 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

14h 36m1 stop Dallas/Fort Worth

10:50 pm - 5:49 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 59m1 stop Miami

$1,148American Airlines

Wed, Dec 2 - Thu, Dec 17

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

24h 30m1 stop Dallas/Fort Worth

10:50 pm - 5:24 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 34m1 stop Miami

$1,148American Airlines

Thu, Jan 14 - Thu, Jan 28

10:04 am - 6:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 16m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

7:20 am - 12:46 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

20h 26m2 stops Lima J Chavez Intl Salt Lake City

$1,148Delta

Wed, Dec 2 - Thu, Dec 17

7:00 pm - 7:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

33h 20m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

11:55 pm - 10:42 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

37h 47m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$1,170United Airlines

Sun, Dec 6 - Mon, Dec 21

Cheap last minute flights

Enter your travel dates to find the best prices.

11:35 am - 7:15 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 40m1 stop Miami

8:50 pm - 10:45 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

15h 55m1 stop Miami

$1,690American Airlines

Wed, Aug 26 - Fri, Aug 28

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

14h 22m1 stop Atlanta Hartsfield-Jackson

12:15 pm - 9:20 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

23h 05m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson

$1,690LATAM Airlines

Wed, Aug 26 - Fri, Aug 28

11:00 am - 7:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

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

3:55 am - 11:58 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

22h 03m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,690LATAM Airlines

Wed, Aug 26 - Thu, Aug 27

5:23 pm - 4:10 pmSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

20h 47m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:35 pm - 11:56 amAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

20h 21m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,755LATAM Airlines

Wed, Aug 26 - Fri, Aug 28

11:00 am - 4:10 pmSTL Lambert-St Louis-AEP Buenos Aires Jorge Newbery

27h 10m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:35 pm - 11:56 amAEP Buenos Aires Jorge Newbery-STL Lambert-St Louis

20h 21m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,837LATAM Airlines

Wed, Aug 26 - Fri, Aug 28

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

24h 20m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Sao Paulo Guarulhos Intl

11:55 pm - 2:02 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

40h 07m2 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl

$8,901Multiple Airlines

Wed, Aug 26 - Fri, Aug 28

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Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets

Delta

Dec 2

STL10:00 amLambert-St Louis

17h 20m

2 stops

EZE6:20 amBuenos Aires Ministro Pistarini

Dec 17

EZE9:30 pmBuenos Aires Ministro Pistarini

22h 02m

1 stop

STL4:32 pmLambert-St Louis

$1,148

Delta

Sep 23

STL6:45 pmLambert-St Louis

13h 00m

1 stop

EZE9:45 amBuenos Aires Ministro Pistarini

Oct 1

EZE8:10 pmBuenos Aires Ministro Pistarini

26h 11m

1 stop

STL8:21 pmLambert-St Louis

$1,169

Delta

Sep 7

STL12:52 pmLambert-St Louis

18h 48m

2 stops

EZE9:40 amBuenos Aires Ministro Pistarini

Sep 21

EZE7:35 amBuenos Aires Ministro Pistarini

18h 07m

2 stops

STL11:42 pmLambert-St Louis

$1,170

LATAM Airlines flights from St. Louis to Argentina

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

LATAM Airlines

Dec 6

STL7:18 pmLambert-St Louis

35h 22m

1 stop

EZE9:40 amBuenos Aires Ministro Pistarini

Dec 21

EZE11:35 pmBuenos Aires Ministro Pistarini

19h 53m

1 stop

STL4:28 pmLambert-St Louis

$1,185

LATAM Airlines

Dec 6

STL2:33 pmLambert-St Louis

22h 27m

2 stops

AEP4:00 pmBuenos Aires Jorge Newbery

Dec 21

AEP5:35 pmBuenos Aires Jorge Newbery

18h 32m

2 stops

STL9:07 amLambert-St Louis

$1,188

LATAM Airlines

Jan 14

STL3:40 pmLambert-St Louis

21h 20m

2 stops

AEP4:00 pmBuenos Aires Jorge Newbery

Jan 28

AEP8:05 pmBuenos Aires Jorge Newbery

39h 07m

2 stops

STL8:12 amLambert-St Louis

$1,207

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

Mon 9/14

2:29 pm-9:40 am

2 stops17h 11m

Buenos Aires Ministro Pistarini

Sun 9/20

1:10 pm-1:10 pm

2 stops26h 00m

$1,035

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 9/21

2:40 pm-3:00 am

3 stops34h 20m

Buenos Aires Ministro Pistarini

Mon 9/28

6:00 am-2:00 pm

3 stops34h 00m

$1,091

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 - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 12/2

10:04 am-7:40 am

2 stops18h 36m

Buenos Aires Jorge Newbery

Thu 12/17

5:35 pm-8:56 am

2 stops18h 21m

$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

11:35 pm-4:32 pm

1 stop19h 57m

$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

2:54 pm-8:30 am

1 stop14h 36m

Buenos Aires Ministro Pistarini

Thu 12/17

10:50 pm-5:49 pm

1 stop21h 59m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 1/14

5:00 am-8:30 am

1 stop24h 30m

Buenos Aires Ministro Pistarini

Thu 1/28

10:50 pm-5:24 pm

1 stop21h 34m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:04 am-6:20 am

2 stops17h 16m

Buenos Aires Ministro Pistarini

Thu 12/17

7:20 am-12:46 am

2 stops20h 26m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Sun 12/6

7:00 pm-7:20 am

2 stops33h 20m

Buenos Aires Ministro Pistarini

Mon 12/21

11:55 pm-10:42 am

2 stops37h 47m

$1,170

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 September, then departing from St. Louis during the month November is also very affordable. Most momondo users find prices during this month for around $1,065.

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

Best Price Found	$368
Fastest flight time	18h 36m
Direct flights	None

The best one-way flight to Argentina from St. Louis in the past 72 hours is $368. The best round-trip flight deal from St. Louis to Argentina found on momondo in the last 72 hours is $1,035.

The fastest flight from St. Louis to Argentina takes 18h 36m

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 1,991 reviews	Search LATAM Airlines flights
Delta	PriceFrom $1,025	Free Cancellation	Rating 7.8 8,520 reviews	Search Delta flights
American Airlines	PriceFrom $1,147	Free Cancellation	Rating 7.1 11,987 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.