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

American Airlines and Air Canada 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 July 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.

$896 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.

12:52 pm - 2:50 pm

STL

AEP

23h 58m

2 stops

8:05 pm - 12:32 pm

AEP

STL

18h 27m

2 stops

$1,148LATAM Airlines

Wed, Sep 2 - Wed, Sep 9

11:00 am - 9:45 am

STL

EZE

20h 45m

1 stop

8:10 pm - 3:54 pm

EZE

STL

21h 44m

1 stop

$1,148Delta

Wed, Sep 2 - Wed, Sep 9

2:57 pm - 8:00 am

STL

EZE

15h 03m

1 stop

9:00 pm - 10:10 am

EZE

STL

15h 10m

1 stop

$1,163United Airlines

Thu, Jul 16 - Tue, Oct 20

6:00 am - 8:00 am

STL

EZE

24h 00m

2 stops

9:00 pm - 2:10 pm

EZE

STL

19h 10m

1 stop

$1,167United Airlines

Thu, Jul 16 - Tue, Oct 20

11:00 am - 7:40 am

STL

AEP

18h 40m

2 stops

8:05 pm - 2:33 pm

AEP

STL

20h 28m

2 stops

$1,178Delta

Thu, Aug 20 - Thu, Aug 27

6:00 am - 8:00 am

STL

EZE

24h 00m

2 stops

9:00 pm - 10:34 am

EZE

STL

39h 34m

2 stops

$1,200United Airlines

Wed, Jul 15 - Thu, Jul 23

6:00 am - 9:40 am

STL

EZE

25h 40m

2 stops

7:35 am - 8:09 am

EZE

STL

26h 34m

2 stops

$1,212LATAM Airlines

Sat, Aug 22 - Sat, Aug 29

6:14 am - 8:00 am

STL

EZE

23h 46m

1 stop

9:00 pm - 10:45 pm

EZE

STL

27h 45m

1 stop

$1,218United Airlines

Wed, Jul 15 - Fri, Jul 24

7:20 am - 8:00 am

STL

EZE

22h 40m

2 stops

9:00 pm - 8:40 pm

EZE

STL

25h 40m

1 stop

$1,222United Airlines

Wed, Jul 15 - Fri, Jul 24

6:00 am - 2:00 pm

STL

AEP

30h 00m

2 stops

5:35 pm - 10:55 am

AEP

STL

19h 20m

2 stops

$1,238LATAM Airlines

Sun, Sep 13 - Thu, Sep 17

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from St. Louis to Argentina

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

United Airlines

Jul 16

STL2:57 pmLambert-St Louis

15h 03m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 20

EZE9:00 pmBuenos Aires Ministro Pistarini

15h 10m

1 stop

STL10:10 amLambert-St Louis

$1,163

United Airlines

Jul 16

STL6:00 amLambert-St Louis

24h 00m

2 stops

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 20

EZE9:00 pmBuenos Aires Ministro Pistarini

19h 10m

1 stop

STL2:10 pmLambert-St Louis

$1,167

United Airlines

Jul 15

STL6:00 amLambert-St Louis

24h 00m

2 stops

EZE8:00 amBuenos Aires Ministro Pistarini

Jul 23

EZE9:00 pmBuenos Aires Ministro Pistarini

39h 34m

2 stops

STL10:34 amLambert-St Louis

$1,200

Air Canada flights from St. Louis to Argentina

Our best Air Canada deals on St. Louis to Argentina flight tickets

Air Canada

Sep 11

STL8:55 amLambert-St Louis

27h 35m

2 stops

EZE2:30 pmBuenos Aires Ministro Pistarini

Sep 12

EZE4:35 pmBuenos Aires Ministro Pistarini

23h 25m

3 stops

STL2:00 pmLambert-St Louis

$1,800

Air Canada

Sep 13

STL12:10 pmLambert-St Louis

24h 20m

2 stops

EZE2:30 pmBuenos Aires Ministro Pistarini

Sep 17

EZE4:35 pmBuenos Aires Ministro Pistarini

28h 06m

3 stops

STL6:41 pmLambert-St Louis

$1,852

Air Canada

Sep 11

STL8:55 amLambert-St Louis

27h 35m

3 stops

EZE2:30 pmBuenos Aires Ministro Pistarini

Sep 12

EZE4:35 pmBuenos Aires Ministro Pistarini

47h 25m

3 stops

STL2:00 pmLambert-St Louis

$1,873

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 9/2

12:52 pm-2:50 pm

2 stops23h 58m

Buenos Aires Jorge Newbery

Wed 9/9

8:05 pm-12:32 pm

2 stops18h 27m

$1,148

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 9/2

11:00 am-9:45 am

1 stop20h 45m

Buenos Aires Ministro Pistarini

Wed 9/9

8:10 pm-3:54 pm

1 stop21h 44m

$1,148

Quickest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 7/16

2:57 pm-8:00 am

1 stop15h 03m

Buenos Aires Ministro Pistarini

Tue 10/20

9:00 pm-10:10 am

1 stop15h 10m

$1,163

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 7/16

6:00 am-8:00 am

2 stops24h 00m

Buenos Aires Ministro Pistarini

Tue 10/20

9:00 pm-2:10 pm

1 stop19h 10m

$1,167

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 8/20

11:00 am-7:40 am

2 stops18h 40m

Buenos Aires Jorge Newbery

Thu 8/27

8:05 pm-2:33 pm

2 stops20h 28m

$1,178

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 7/15

6:00 am-8:00 am

2 stops24h 00m

Buenos Aires Ministro Pistarini

Thu 7/23

9:00 pm-10:34 am

2 stops39h 34m

$1,200

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 8/22

6:00 am-9:40 am

2 stops25h 40m

Buenos Aires Ministro Pistarini

Sat 8/29

7:35 am-8:09 am

2 stops26h 34m

$1,212

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 7/15

6:14 am-8:00 am

1 stop23h 46m

Buenos Aires Ministro Pistarini

Fri 7/24

9:00 pm-10:45 pm

1 stop27h 45m

$1,218

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 7/15

7:20 am-8:00 am

2 stops22h 40m

Buenos Aires Ministro Pistarini

Fri 7/24

9:00 pm-8:40 pm

1 stop25h 40m

$1,222

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 9/13

6:00 am-2:00 pm

2 stops30h 00m

Buenos Aires Jorge Newbery

Thu 9/17

5:35 pm-10:55 am

2 stops19h 20m

$1,238

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 August, 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 6% 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	16h 44m
Direct flights	None

The fastest flight from St. Louis to Argentina takes 16h 44m

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 July 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 1,953 reviews		Search LATAM Airlines flights
Delta	PriceFrom $1,025	Free Cancellation	Rating 7.8 8,458 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.