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

American Airlines is the most popular carrier 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 April 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.

$382 Cheap Flights from St. Louis to Argentina in 2026

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Find the cheapest flights from St. Louis to Argentina

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:10 pm - 2:30 pm

STL

EZE

24h 20m

2 stops

4:35 pm - 6:41 pm

EZE

STL

52h 06m

3 stops

$1,087Air Canada

Sun, Sep 27 - Mon, Oct 5

2:15 pm - 2:30 pm

STL

EZE

22h 15m

2 stops

4:35 pm - 12:06 pm

EZE

STL

21h 31m

2 stops

$1,123Air Canada

Wed, May 13 - Wed, May 20

12:10 pm - 2:30 pm

STL

EZE

24h 20m

2 stops

4:35 pm - 6:41 pm

EZE

STL

28h 06m

2 stops

$1,128Air Canada

Sun, Sep 27 - Mon, Oct 5

7:01 pm - 9:45 am

STL

EZE

12h 44m

1 stop

8:10 pm - 9:46 am

EZE

STL

15h 36m

1 stop

$1,131LATAM Airlines

Thu, May 28 - Tue, Jun 9

10:49 am - 8:30 am

STL

AEP

19h 41m

2 stops

3:45 pm - 9:46 am

AEP

STL

20h 01m

2 stops

$1,139LATAM Airlines

Thu, May 28 - Tue, Jun 9

8:35 am - 8:00 am

STL

EZE

21h 25m

1 stop

9:00 pm - 10:07 am

EZE

STL

15h 07m

1 stop

$1,147United Airlines

Thu, May 28 - Tue, Jun 9

1:13 pm - 8:00 am

STL

EZE

16h 47m

2 stops

9:00 pm - 3:46 pm

EZE

STL

20h 46m

2 stops

$1,151United Airlines

Thu, May 28 - Mon, Jun 8

1:27 pm - 9:40 am

STL

AEP

18h 13m

2 stops

8:05 pm - 12:20 pm

AEP

STL

18h 15m

2 stops

$1,297Delta

Tue, May 12 - Tue, May 19

7:05 am - 9:00 pm

STL

AEP

35h 55m

3 stops

1:40 pm - 8:25 pm

AEP

STL

32h 45m

2 stops

$1,310Multiple Airlines

Wed, May 13 - Wed, May 20

9:13 am - 7:40 am

STL

AEP

20h 27m

2 stops

8:05 pm - 4:10 pm

AEP

STL

22h 05m

2 stops

$1,527Delta

Fri, May 22 - Sat, May 30

United Airlines flights from St. Louis to Argentina

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

United Airlines

May 28

STL8:35 amLambert-St Louis

21h 25m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Jun 9

EZE9:00 pmBuenos Aires Ministro Pistarini

15h 07m

1 stop

STL10:07 amLambert-St Louis

$1,147

United Airlines

Apr 15

STL10:09 amLambert-St Louis

19h 51m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Jun 12

EZE9:00 pmBuenos Aires Ministro Pistarini

15h 07m

1 stop

STL10:07 amLambert-St Louis

$1,317

United Airlines

Apr 15

STL10:00 amLambert-St Louis

20h 00m

2 stops

EZE8:00 amBuenos Aires Ministro Pistarini

Jun 12

EZE9:00 pmBuenos Aires Ministro Pistarini

24h 23m

2 stops

STL7:23 pmLambert-St Louis

$1,321

LATAM Airlines flights from St. Louis to Argentina

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

LATAM Airlines

May 28

STL10:49 amLambert-St Louis

17h 21m

2 stops

EZE6:10 amBuenos Aires Ministro Pistarini

Jun 9

EZE7:35 amBuenos Aires Ministro Pistarini

18h 21m

2 stops

STL11:56 pmLambert-St Louis

$1,139

LATAM Airlines

Sep 27

STL7:05 pmLambert-St Louis

33h 05m

2 stops

EZE6:10 amBuenos Aires Ministro Pistarini

Oct 5

EZE8:10 pmBuenos Aires Ministro Pistarini

14h 02m

1 stop

STL8:12 amLambert-St Louis

$1,157

LATAM Airlines

May 17

STL7:01 pmLambert-St Louis

12h 44m

1 stop

EZE9:45 amBuenos Aires Ministro Pistarini

May 24

EZE1:10 pmBuenos Aires Ministro Pistarini

22h 34m

2 stops

STL9:44 amLambert-St Louis

$1,183

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 9/27

12:10 pm-2:30 pm

2 stops24h 20m

Buenos Aires Ministro Pistarini

Mon 10/5

4:35 pm-6:41 pm

3 stops52h 06m

$1,087

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/13

2:15 pm-2:30 pm

2 stops22h 15m

Buenos Aires Ministro Pistarini

Wed 5/20

4:35 pm-12:06 pm

2 stops21h 31m

$1,123

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 9/27

12:10 pm-2:30 pm

2 stops24h 20m

Buenos Aires Ministro Pistarini

Mon 10/5

4:35 pm-6:41 pm

2 stops28h 06m

$1,128

Quickest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/28

7:01 pm-9:45 am

1 stop12h 44m

Buenos Aires Ministro Pistarini

Tue 6/9

8:10 pm-9:46 am

1 stop15h 36m

$1,131

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 5/28

10:49 am-8:30 am

2 stops19h 41m

Buenos Aires Jorge Newbery

Tue 6/9

3:45 pm-9:46 am

2 stops20h 01m

$1,139

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/28

8:35 am-8:00 am

1 stop21h 25m

Buenos Aires Ministro Pistarini

Tue 6/9

9:00 pm-10:07 am

1 stop15h 07m

$1,147

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/28

1:13 pm-8:00 am

2 stops16h 47m

Buenos Aires Ministro Pistarini

Mon 6/8

9:00 pm-3:46 pm

2 stops20h 46m

$1,151

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Tue 5/12

1:27 pm-9:40 am

2 stops18h 13m

Buenos Aires Jorge Newbery

Tue 5/19

8:05 pm-12:20 pm

2 stops18h 15m

$1,297

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 5/13

7:05 am-9:00 pm

3 stops35h 55m

Buenos Aires Jorge Newbery

Wed 5/20

1:40 pm-8:25 pm

2 stops32h 45m

$1,310

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 5/22

9:13 am-7:40 am

2 stops20h 27m

Buenos Aires Jorge Newbery

Sat 5/30

8:05 pm-4:10 pm

2 stops22h 05m

$1,527

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 October is also very affordable. Most momondo users find prices during this month for around $1,160.

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

You could potentially save up to 8% 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	17h 58m
Direct flights	None

The fastest flight from St. Louis to Argentina takes 17h 58m

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 April 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 1,905 reviews		Search LATAM Airlines flights
Delta	PriceFrom $1,025	Free Cancellation	Rating 7.9 8,365 reviews		Search Delta 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.