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Cheap flights from St. Louis to Argentina from $437

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Argentina departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
12:04 pm - 9:00 am
STL
-
EZE
18h 56m
1 stop
LATAM Airlines Logo
8:55 pm - 5:53 pm
EZE
-
STL
22h 58m
1 stop
$929LATAM Airlines
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
10:10 am - 7:20 am
STL
-
EZE
18h 10m
1 stop
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m
1 stop
$937United Airlines
Tue, Mar 3 - Tue, Mar 10
LATAM Airlines Logo
11:55 am - 10:15 am
STL
-
EZE
19h 20m
2 stops
LATAM Airlines Logo
4:05 am - 11:58 pm
EZE
-
STL
21h 53m
2 stops
$941LATAM Airlines
Mon, Mar 2 - Tue, Mar 24
LATAM Airlines Logo
7:03 am - 9:35 am
STL
-
EZE
24h 32m
2 stops
LATAM Airlines Logo
8:55 pm - 9:05 am
EZE
-
STL
14h 10m
1 stop
$966LATAM Airlines
Thu, Mar 12 - Thu, Mar 19
LATAM Airlines Logo
6:00 am - 9:35 am
STL
-
EZE
25h 35m
2 stops
LATAM Airlines Logo
7:45 am - 9:05 am
EZE
-
STL
27h 20m
2 stops
$971LATAM Airlines
Thu, Mar 12 - Thu, Mar 19
LATAM Airlines Logo
6:59 pm - 6:20 am
STL
-
EZE
33h 21m
2 stops
LATAM Airlines Logo
3:55 pm - 11:58 pm
EZE
-
STL
34h 03m
2 stops
$974LATAM Airlines
Sun, Mar 8 - Sun, Mar 15
LATAM Airlines Logo
3:47 pm - 9:35 am
STL
-
EZE
38h 48m
2 stops
LATAM Airlines Logo
3:55 pm - 11:58 pm
EZE
-
STL
34h 03m
2 stops
$979LATAM Airlines
Sun, Mar 1 - Sun, Mar 8
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m
2 stops
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m
1 stop
$1,008United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
10:13 am - 6:04 pm
STL
-
EZE
28h 51m
2 stops
LATAM Airlines Logo
7:45 am - 9:05 am
EZE
-
STL
27h 20m
3 stops
$1,023LATAM Airlines
Tue, Mar 3 - Tue, Mar 10
LATAM Airlines Logo
6:59 pm - 4:00 pm
STL
-
AEP
19h 01m
2 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m
2 stops
$1,067LATAM Airlines
Thu, Mar 12 - Thu, Mar 19

LATAM Airlines flights from St. Louis to Argentina

Our best LATAM Airlines deals on St. Louis to Argentina flight tickets
LATAM Airlines
Mar 10
STL12:04 pmLambert-St Louis
18h 56m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
22h 58m
1 stop
STL5:53 pmLambert-St Louis
$929
LATAM Airlines
Mar 2
STL11:55 amLambert-St Louis
19h 20m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Mar 24
EZE4:05 amBuenos Aires Ministro Pistarini
21h 53m
2 stops
STL11:58 pmLambert-St Louis
$941
LATAM Airlines
Mar 12
STL7:03 amLambert-St Louis
24h 32m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 19
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 10m
1 stop
STL9:05 amLambert-St Louis
$966

United Airlines flights from St. Louis to Argentina

Our best United Airlines deals on St. Louis to Argentina flight tickets
United Airlines
Mar 3
STL10:10 amLambert-St Louis
18h 10m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 10
EZE9:05 pmBuenos Aires Ministro Pistarini
14h 16m
1 stop
STL9:21 amLambert-St Louis
$937
United Airlines
Mar 8
STL7:41 amLambert-St Louis
46h 39m
2 stops
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE9:05 pmBuenos Aires Ministro Pistarini
14h 16m
1 stop
STL9:21 amLambert-St Louis
$1,008
United Airlines
Feb 28
STL7:41 amLambert-St Louis
22h 39m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Mar 20
EZE9:05 pmBuenos Aires Ministro Pistarini
26h 00m
2 stops
STL9:05 pmLambert-St Louis
$1,244

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Argentina that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from St. Louis to Argentina that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/10

12:04 pm-9:00 am

1 stop18h 56m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-5:53 pm

1 stop22h 58m

$929

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/3

10:10 am-7:20 am

1 stop18h 10m

Buenos Aires Ministro Pistarini

Tue 3/10

9:05 pm-9:21 am

1 stop14h 16m

$937

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 3/2

11:55 am-10:15 am

2 stops19h 20m

Buenos Aires Ministro Pistarini

Tue 3/24

4:05 am-11:58 pm

2 stops21h 53m

$941

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 3/12

7:03 am-9:35 am

2 stops24h 32m

Buenos Aires Ministro Pistarini

Thu 3/19

8:55 pm-9:05 am

1 stop14h 10m

$966

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 3/12

6:00 am-9:35 am

2 stops25h 35m

Buenos Aires Ministro Pistarini

Thu 3/19

7:45 am-9:05 am

2 stops27h 20m

$971

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

6:59 pm-6:20 am

2 stops33h 21m

Buenos Aires Ministro Pistarini

Sun 3/15

3:55 pm-11:58 pm

2 stops34h 03m

$974

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/1

3:47 pm-9:35 am

2 stops38h 48m

Buenos Aires Ministro Pistarini

Sun 3/8

3:55 pm-11:58 pm

2 stops34h 03m

$979

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

7:41 am-8:20 am

2 stops46h 39m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-9:21 am

1 stop14h 16m

$1,008

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/3

10:13 am-6:04 pm

2 stops28h 51m

Buenos Aires Ministro Pistarini

Tue 3/10

7:45 am-9:05 am

3 stops27h 20m

$1,023

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 3/12

6:59 pm-4:00 pm

2 stops19h 01m

Buenos Aires Jorge Newbery

Thu 3/19

5:15 pm-11:09 am

2 stops19h 54m

$1,067

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Argentina from

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

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 46% 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

13h 52m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 13h 52m
There are no direct flights from St. Louis to Argentina. There are no popular flight routes from St. Louis to Argentina.
Search flight deals

  • 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?

  • 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
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,111 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.

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