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Cheap flights from St. Louis to Argentina from $361

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 1/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
3:58 pm - 9:35 am
STL
-
EZE
15h 37m2 stops
LATAM Airlines Logo
8:00 am - 11:42 pm
EZE
-
STL
17h 42m2 stops
$1,048LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
6:59 pm - 5:00 pm
STL
-
AEP
20h 01m2 stops
LATAM Airlines Logo
3:40 pm - 8:52 am
AEP
-
STL
19h 12m2 stops
$1,058LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
10:02 am - 9:00 am
STL
-
EZE
20h 58m1 stop
LATAM Airlines Logo
8:55 pm - 8:52 am
EZE
-
STL
13h 57m1 stop
$1,058LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:22 pm - 9:35 am
STL
-
EZE
19h 13m2 stops
LATAM Airlines Logo
7:45 am - 11:42 pm
EZE
-
STL
17h 57m2 stops
$1,062LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
3:47 pm - 7:20 am
STL
-
EZE
12h 33m1 stop
LATAM Airlines Logo
4:05 am - 11:36 pm
EZE
-
STL
22h 31m2 stops
$1,090LATAM Airlines
Fri, Feb 13 - Fri, Feb 27
LATAM Airlines Logo
10:13 am - 9:35 am
STL
-
EZE
20h 22m2 stops
LATAM Airlines Logo
7:45 am - 11:36 pm
EZE
-
STL
18h 51m2 stops
$1,094LATAM Airlines
Fri, Feb 13 - Sat, Feb 28
Multiple Airlines Logo
3:47 pm - 7:20 am
STL
-
EZE
12h 33m1 stop
Multiple Airlines Logo
11:55 pm - 11:02 am
EZE
-
STL
14h 07m1 stop
$1,106Multiple Airlines
Fri, Feb 13 - Sat, Feb 28
LATAM Airlines Logo
9:59 am - 7:20 am
STL
-
EZE
18h 21m1 stop
LATAM Airlines Logo
8:55 pm - 4:07 pm
EZE
-
STL
22h 12m1 stop
$1,148LATAM Airlines
Tue, Jan 6 - Tue, Jan 20
Multiple Airlines Logo
6:00 am - 7:30 pm
STL
-
EZE
34h 30m1 stop
Multiple Airlines Logo
9:15 pm - 3:57 pm
EZE
-
STL
21h 42m2 stops
$1,153Multiple Airlines
Tue, Jan 6 - Wed, Jan 21
United Airlines Logo
11:20 am - 9:20 am
STL
-
EZE
19h 00m2 stops
United Airlines Logo
10:05 pm - 2:30 pm
EZE
-
STL
19h 25m2 stops
$1,167United Airlines
Wed, Jan 7 - Thu, Jan 22

LATAM Airlines flights from St. Louis to Argentina

Our best LATAM Airlines deals on St. Louis to Argentina flight tickets
LATAM Airlines
May 27
STL11:51 amLambert-St Louis
18h 44m
2 stops
EZE8:35 amBuenos Aires Ministro Pistarini
Jun 8
EZE10:40 pmBuenos Aires Ministro Pistarini
21h 22m
2 stops
STL6:02 pmLambert-St Louis
$1,022
Find similar
LATAM Airlines
May 27
STL6:00 amLambert-St Louis
24h 35m
2 stops
EZE8:35 amBuenos Aires Ministro Pistarini
Jun 8
EZE7:35 amBuenos Aires Ministro Pistarini
26h 32m
3 stops
STL8:07 amLambert-St Louis
$1,033
Find similar
LATAM Airlines
Mar 8
STL3:58 pmLambert-St Louis
15h 37m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:00 amBuenos Aires Ministro Pistarini
17h 42m
2 stops
STL11:42 pmLambert-St Louis
$1,048
Find similar

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Jan 8
STL12:00 pmLambert-St Louis
19h 15m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Jan 26
EZE10:25 pmBuenos Aires Ministro Pistarini
21h 12m
2 stops
STL4:37 pmLambert-St Louis
$1,180
Find similar
Delta
May 27
STL5:30 pmLambert-St Louis
14h 15m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Jun 8
EZE8:10 pmBuenos Aires Ministro Pistarini
20h 27m
1 stop
STL2:37 pmLambert-St Louis
$1,234
Find similar
Delta
Feb 9
STL3:45 pmLambert-St Louis
14h 15m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 6
EZE8:55 pmBuenos Aires Ministro Pistarini
17h 07m
1 stop
STL11:02 amLambert-St Louis
$1,362
Find similar

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 December 11, 2025.
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

3:58 pm-9:35 am

2 stops15h 37m

Buenos Aires Ministro Pistarini

Tue 3/17

8:00 am-11:42 pm

2 stops17h 42m

$1,048

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sun 3/8

6:59 pm-5:00 pm

2 stops20h 01m

Buenos Aires Jorge Newbery

Tue 3/17

3:40 pm-8:52 am

2 stops19h 12m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

10:02 am-9:00 am

1 stop20h 58m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-8:52 am

1 stop13h 57m

$1,058

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

12:22 pm-9:35 am

2 stops19h 13m

Buenos Aires Ministro Pistarini

Tue 3/17

7:45 am-11:42 pm

2 stops17h 57m

$1,062

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 2/13

3:47 pm-7:20 am

1 stop12h 33m

Buenos Aires Ministro Pistarini

Fri 2/27

4:05 am-11:36 pm

2 stops22h 31m

$1,090

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 2/13

10:13 am-9:35 am

2 stops20h 22m

Buenos Aires Ministro Pistarini

Sat 2/28

7:45 am-11:36 pm

2 stops18h 51m

$1,094

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 2/13

3:47 pm-7:20 am

1 stop12h 33m

Buenos Aires Ministro Pistarini

Sat 2/28

11:55 pm-11:02 am

1 stop14h 07m

$1,106

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 1/6

9:59 am-7:20 am

1 stop18h 21m

Buenos Aires Ministro Pistarini

Tue 1/20

8:55 pm-4:07 pm

1 stop22h 12m

$1,148

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 1/6

6:00 am-7:30 pm

1 stop34h 30m

Buenos Aires Ministro Pistarini

Wed 1/21

9:15 pm-3:57 pm

2 stops21h 42m

$1,153

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 1/7

11:20 am-9:20 am

2 stops19h 00m

Buenos Aires Ministro Pistarini

Thu 1/22

10:05 pm-2:30 pm

2 stops19h 25m

$1,167

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.

What is the cheapest day to depart on your flight to Argentina?

The cheapest day to depart from St. Louis to Argentina is on a Tuesday. Travelers who choose to depart for Argentina on a Tuesday will often find tickets for as low as $1,163. The most expensive day to fly to Argentina is Friday, with ticket prices averaging around $1,386.

What is the cheapest time of day to depart on your flight to Argentina?

The cheapest time of day to fly to Argentina is in the evening when flights can be purchased for as low as $1,153. Flights in the morning are often more expensive with an average ticket price of $1,368.

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

14h 15m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 14h 15m
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
8,007 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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