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Cheap flights from St. Louis to Argentina from $525

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 4/30. 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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Find the cheapest flights from St. Louis to Argentina

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m
2 stops
United Airlines Logo
9:05 pm - 9:07 pm
EZE
-
STL
26h 02m
2 stops
$957United Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m
2 stops
United Airlines Logo
9:05 pm - 9:07 pm
EZE
-
STL
26h 02m
2 stops
$977United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:04 pm - 5:00 pm
STL
-
AEP
26h 56m
2 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m
2 stops
$1,014LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
4:21 pm - 7:20 am
STL
-
EZE
12h 59m
1 stop
LATAM Airlines Logo
8:55 pm - 5:53 pm
EZE
-
STL
22h 58m
1 stop
$1,014LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
4:21 pm - 7:20 am
STL
-
EZE
12h 59m
1 stop
LATAM Airlines Logo
7:35 am - 5:53 pm
EZE
-
STL
36h 18m
2 stops
$1,092LATAM Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
6:04 am - 9:35 am
STL
-
EZE
25h 31m
2 stops
LATAM Airlines Logo
3:45 pm - 9:05 am
EZE
-
STL
43h 20m
2 stops
$1,101LATAM Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
11:43 am - 4:00 pm
STL
-
AEP
26h 17m
2 stops
LATAM Airlines Logo
5:05 pm - 10:34 am
AEP
-
STL
19h 29m
2 stops
$1,103LATAM Airlines
Thu, Apr 30 - Mon, May 4
LATAM Airlines Logo
1:11 pm - 9:45 am
STL
-
EZE
18h 34m
1 stop
LATAM Airlines Logo
3:45 pm - 5:54 pm
EZE
-
STL
28h 09m
2 stops
$1,103LATAM Airlines
Thu, Apr 30 - Sun, May 3
LATAM Airlines Logo
12:04 pm - 7:20 am
STL
-
EZE
17h 16m
1 stop
LATAM Airlines Logo
8:10 pm - 11:09 am
EZE
-
STL
16h 59m
1 stop
$1,133LATAM Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
1:11 pm - 10:30 am
STL
-
AEP
19h 19m
2 stops
LATAM Airlines Logo
8:05 pm - 10:34 am
AEP
-
STL
16h 29m
2 stops
$1,135LATAM Airlines
Mon, Apr 20 - Sat, Apr 25

American Airlines flights from St. Louis to Argentina

Our best American Airlines deals on St. Louis to Argentina flight tickets
American Airlines
Apr 25
STL5:24 amLambert-St Louis
23h 51m
1 stop
EZE7:15 amBuenos Aires Ministro Pistarini
Apr 30
EZE8:25 pmBuenos Aires Ministro Pistarini
15h 51m
1 stop
STL10:16 amLambert-St Louis
$1,203
American Airlines
Mar 14
STL6:20 pmLambert-St Louis
13h 39m
1 stop
EZE9:59 amBuenos Aires Ministro Pistarini
Mar 27
EZE10:25 pmBuenos Aires Ministro Pistarini
14h 34m
1 stop
STL10:59 amLambert-St Louis
$1,290

Air Canada flights from St. Louis to Argentina

Our best Air Canada deals on St. Louis to Argentina flight tickets
Air Canada
Apr 25
STL7:45 amLambert-St Louis
52h 45m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Apr 30
EZE4:30 pmBuenos Aires Ministro Pistarini
53h 35m
3 stops
STL8:05 pmLambert-St Louis
$1,528
Air Canada
Jun 29
STL2:20 pmLambert-St Louis
46h 10m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jul 6
EZE4:35 pmBuenos Aires Ministro Pistarini
23h 27m
3 stops
STL2:02 pmLambert-St Louis
$1,549
Air Canada
Feb 28
STL4:05 pmLambert-St Louis
20h 05m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Mar 7
EZE4:45 pmBuenos Aires Ministro Pistarini
30h 22m
3 stops
STL8:07 pmLambert-St Louis
$1,703

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 16, 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

Sun 3/8

7:41 am-8:20 am

2 stops46h 39m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-9:07 pm

2 stops26h 02m

$957

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-9:07 pm

2 stops26h 02m

$977

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 3/8

12:04 pm-5:00 pm

2 stops26h 56m

Buenos Aires Jorge Newbery

Tue 3/17

5:15 pm-11:09 am

2 stops19h 54m

$1,014

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

4:21 pm-7:20 am

1 stop12h 59m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-5:53 pm

1 stop22h 58m

$1,014

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 3/27

4:21 pm-7:20 am

1 stop12h 59m

Buenos Aires Ministro Pistarini

Sun 4/5

7:35 am-5:53 pm

2 stops36h 18m

$1,092

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 3/27

6:04 am-9:35 am

2 stops25h 31m

Buenos Aires Ministro Pistarini

Sun 4/5

3:45 pm-9:05 am

2 stops43h 20m

$1,101

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Thu 4/30

11:43 am-4:00 pm

2 stops26h 17m

Buenos Aires Jorge Newbery

Mon 5/4

5:05 pm-10:34 am

2 stops19h 29m

$1,103

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 4/30

1:11 pm-9:45 am

1 stop18h 34m

Buenos Aires Ministro Pistarini

Sun 5/3

3:45 pm-5:54 pm

2 stops28h 09m

$1,103

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 3/27

12:04 pm-7:20 am

1 stop17h 16m

Buenos Aires Ministro Pistarini

Sun 4/5

8:10 pm-11:09 am

1 stop16h 59m

$1,133

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Mon 4/20

1:11 pm-10:30 am

2 stops19h 19m

Buenos Aires Jorge Newbery

Sat 4/25

8:05 pm-10:34 am

2 stops16h 29m

$1,135

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 $1,145.

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

16h 37m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 16h 37m
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
8,051 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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