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Cheap flights from St. Louis to Argentina from $355

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 3/16. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
5:00 pm - 4:00 pm
STL
-
AEP
20h 00m
2 stops
LATAM Airlines Logo
3:45 pm - 11:09 am
AEP
-
STL
21h 24m
2 stops
$937LATAM Airlines
Tue, Mar 3 - Tue, Mar 10
LATAM Airlines Logo
12:04 pm - 9:00 am
STL
-
EZE
18h 56m
1 stop
LATAM Airlines Logo
7:45 am - 11:58 pm
EZE
-
STL
18h 13m
2 stops
$937LATAM Airlines
Tue, Mar 10 - Tue, Mar 17
LATAM Airlines Logo
10:13 am - 10:15 am
STL
-
EZE
21h 02m
2 stops
LATAM Airlines Logo
8:00 am - 11:58 pm
EZE
-
STL
17h 58m
2 stops
$941LATAM Airlines
Tue, Mar 3 - Tue, Mar 10
LATAM Airlines Logo
10:13 am - 11:45 am
STL
-
AEP
22h 32m
3 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m
2 stops
$1,059LATAM Airlines
Tue, Mar 3 - Tue, Mar 10
LATAM Airlines Logo
4:21 pm - 4:00 pm
STL
-
AEP
21h 39m
2 stops
LATAM Airlines Logo
3:40 pm - 11:09 am
AEP
-
STL
21h 29m
2 stops
$1,067LATAM Airlines
Thu, Mar 19 - Thu, Mar 26
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
$1,089United Airlines
Sun, Mar 8 - Tue, Mar 17
Delta Logo
12:04 pm - 9:00 am
STL
-
EZE
18h 56m
1 stop
Delta Logo
8:55 pm - 4:16 pm
EZE
-
STL
21h 21m
1 stop
$1,107Delta
Sun, Mar 8 - Tue, Mar 17
Avianca Logo
10:10 am - 9:20 am
STL
-
EZE
20h 10m
1 stop
Avianca Logo
10:05 pm - 9:23 am
EZE
-
STL
14h 18m
1 stop
$1,223Avianca
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
11:25 am - 7:20 am
STL
-
EZE
16h 55m
2 stops
Multiple Airlines Logo
10:05 pm - 9:23 am
EZE
-
STL
14h 18m
1 stop
$1,227Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
4:05 pm - 4:30 pm
STL
-
AEP
22h 25m
2 stops
Multiple Airlines Logo
7:35 pm - 3:29 pm
AEP
-
STL
45h 54m
3 stops
$1,487Multiple Airlines
Thu, Mar 19 - Thu, Mar 26

United Airlines flights from St. Louis to Argentina

Our best United Airlines deals on St. Louis to Argentina flight tickets
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
$1,089
United Airlines
Feb 19
STL11:25 amLambert-St Louis
16h 55m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Feb 25
EZE10:05 pmBuenos Aires Ministro Pistarini
19h 24m
2 stops
STL2:29 pmLambert-St Louis
$1,401
United Airlines
Feb 23
STL8:17 amLambert-St Louis
20h 03m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 1
EZE11:55 pmBuenos Aires Ministro Pistarini
20h 49m
2 stops
STL5:44 pmLambert-St Louis
$1,411

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Mar 8
STL12:04 pmLambert-St Louis
18h 56m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
21h 21m
1 stop
STL4:16 pmLambert-St Louis
$1,107
Delta
Feb 12
STL10:13 amLambert-St Louis
19h 47m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 4
EZE8:55 pmBuenos Aires Ministro Pistarini
15h 11m
1 stop
STL9:06 amLambert-St Louis
$1,603
Delta
Apr 15
STL6:50 pmLambert-St Louis
12h 55m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Jun 12
EZE7:45 amBuenos Aires Ministro Pistarini
30h 49m
2 stops
STL12:34 pmLambert-St Louis
$1,995

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 February 3, 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 - AEP

STLAEP

Lambert-St Louis

Tue 3/3

5:00 pm-4:00 pm

2 stops20h 00m

Buenos Aires Jorge Newbery

Tue 3/10

3:45 pm-11:09 am

2 stops21h 24m

$937

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

7:45 am-11:58 pm

2 stops18h 13m

$937

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/3

10:13 am-10:15 am

2 stops21h 02m

Buenos Aires Ministro Pistarini

Tue 3/10

8:00 am-11:58 pm

2 stops17h 58m

$941

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Tue 3/3

10:13 am-11:45 am

3 stops22h 32m

Buenos Aires Jorge Newbery

Tue 3/10

5:15 pm-11:09 am

2 stops19h 54m

$1,059

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 3/19

4:21 pm-4:00 pm

2 stops21h 39m

Buenos Aires Jorge Newbery

Thu 3/26

3:40 pm-11:09 am

2 stops21h 29m

$1,067

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

$1,089

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

12:04 pm-9:00 am

1 stop18h 56m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-4:16 pm

1 stop21h 21m

$1,107

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 2/19

10:10 am-9:20 am

1 stop20h 10m

Buenos Aires Ministro Pistarini

Thu 2/26

10:05 pm-9:23 am

1 stop14h 18m

$1,223

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 2/19

11:25 am-7:20 am

2 stops16h 55m

Buenos Aires Ministro Pistarini

Thu 2/26

10:05 pm-9:23 am

1 stop14h 18m

$1,227

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 3/19

4:05 pm-4:30 pm

2 stops22h 25m

Buenos Aires Jorge Newbery

Thu 3/26

7:35 pm-3:29 pm

3 stops45h 54m

$1,487

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 39m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 13h 39m
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
8,132 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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