Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Argentina from $992

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Argentina departing on 3/31. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Argentina

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
10:12 am - 7:40 am
STL
-
AEP
19h 28m
2 stops
LATAM Airlines Logo
3:45 pm - 9:05 am
AEP
-
STL
19h 20m
2 stops
$992LATAM Airlines
Tue, Mar 31 - Tue, Apr 7
LATAM Airlines Logo
6:59 pm - 9:45 am
STL
-
EZE
12h 46m
1 stop
LATAM Airlines Logo
4:45 pm - 11:09 am
EZE
-
STL
20h 24m
2 stops
$992LATAM Airlines
Tue, Mar 31 - Tue, Apr 7
LATAM Airlines Logo
12:04 pm - 8:35 am
STL
-
EZE
18h 31m
2 stops
LATAM Airlines Logo
3:55 am - 11:58 pm
EZE
-
STL
22h 03m
2 stops
$996LATAM Airlines
Tue, Mar 31 - Mon, Apr 6
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
LATAM Airlines Logo
12:04 pm - 7:55 am
STL
-
AEP
17h 51m
2 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m
2 stops
$1,099LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:04 pm - 6:20 am
STL
-
EZE
16h 16m
2 stops
LATAM Airlines Logo
8:00 am - 11:58 pm
EZE
-
STL
17h 58m
2 stops
$1,099LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
6:00 am - 6:20 am
STL
-
EZE
22h 20m
1 stop
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m
1 stop
$1,107United Airlines
Sun, Mar 8 - Tue, Mar 17
American Airlines Logo
2:19 pm - 9:59 am
STL
-
EZE
17h 40m
2 stops
American Airlines Logo
10:25 pm - 5:13 pm
EZE
-
STL
20h 48m
1 stop
$1,111American Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
5:00 pm - 5:00 pm
STL
-
AEP
22h 00m
2 stops
LATAM Airlines Logo
5:05 pm - 11:09 am
AEP
-
STL
20h 04m
2 stops
$1,119LATAM Airlines
Sat, Mar 21 - Sat, Apr 4
American Airlines Logo
5:15 am - 7:10 am
STL
-
EZE
23h 55m
1 stop
American Airlines Logo
8:30 pm - 10:32 am
EZE
-
STL
16h 02m
1 stop
$1,127American Airlines
Sat, Mar 21 - Sat, Apr 4

American Airlines flights from St. Louis to Argentina

Our best American Airlines deals on St. Louis to Argentina flight tickets
American Airlines
Mar 8
STL2:19 pmLambert-St Louis
17h 40m
2 stops
EZE9:59 amBuenos Aires Ministro Pistarini
Mar 17
EZE10:25 pmBuenos Aires Ministro Pistarini
20h 48m
1 stop
STL5:13 pmLambert-St Louis
$1,111
American Airlines
Mar 21
STL5:15 amLambert-St Louis
23h 55m
1 stop
EZE7:10 amBuenos Aires Ministro Pistarini
Apr 4
EZE8:30 pmBuenos Aires Ministro Pistarini
16h 02m
1 stop
STL10:32 amLambert-St Louis
$1,127
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

LATAM Airlines flights from St. Louis to Argentina

Our best LATAM Airlines deals on St. Louis to Argentina flight tickets
LATAM Airlines
Mar 31
STL6:59 pmLambert-St Louis
12h 46m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Apr 7
EZE4:45 pmBuenos Aires Ministro Pistarini
20h 24m
2 stops
STL11:09 amLambert-St Louis
$992
LATAM Airlines
Mar 31
STL12:04 pmLambert-St Louis
18h 31m
2 stops
EZE8:35 amBuenos Aires Ministro Pistarini
Apr 6
EZE3:55 amBuenos Aires Ministro Pistarini
22h 03m
2 stops
STL11:58 pmLambert-St Louis
$996
LATAM Airlines
Mar 8
STL12:04 pmLambert-St Louis
16h 16m
2 stops
EZE6:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:00 amBuenos Aires Ministro Pistarini
17h 58m
2 stops
STL11:58 pmLambert-St Louis
$1,099

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 22, 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 3/31

10:12 am-7:40 am

2 stops19h 28m

Buenos Aires Jorge Newbery

Tue 4/7

3:45 pm-9:05 am

2 stops19h 20m

$992

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/31

6:59 pm-9:45 am

1 stop12h 46m

Buenos Aires Ministro Pistarini

Tue 4/7

4:45 pm-11:09 am

2 stops20h 24m

$992

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/31

12:04 pm-8:35 am

2 stops18h 31m

Buenos Aires Ministro Pistarini

Mon 4/6

3:55 am-11:58 pm

2 stops22h 03m

$996

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 - AEP

STLAEP

Lambert-St Louis

Sun 3/8

12:04 pm-7:55 am

2 stops17h 51m

Buenos Aires Jorge Newbery

Tue 3/17

5:15 pm-11:09 am

2 stops19h 54m

$1,099

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

12:04 pm-6:20 am

2 stops16h 16m

Buenos Aires Ministro Pistarini

Tue 3/17

8:00 am-11:58 pm

2 stops17h 58m

$1,099

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

6:00 am-6:20 am

1 stop22h 20m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-9:21 am

1 stop14h 16m

$1,107

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

2:19 pm-9:59 am

2 stops17h 40m

Buenos Aires Ministro Pistarini

Tue 3/17

10:25 pm-5:13 pm

1 stop20h 48m

$1,111

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sat 3/21

5:00 pm-5:00 pm

2 stops22h 00m

Buenos Aires Jorge Newbery

Sat 4/4

5:05 pm-11:09 am

2 stops20h 04m

$1,119

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 3/21

5:15 am-7:10 am

1 stop23h 55m

Buenos Aires Ministro Pistarini

Sat 4/4

8:30 pm-10:32 am

1 stop16h 02m

$1,127

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

12h 40m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 12h 40m
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
8,087 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.

An easier way to manage your Argentina trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/21
Sat 2/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Argentina

Popular cities in Argentina

Popular flights according to clicks in the last 7 days on momondo
Flights to Buenos Airesfrom $478
Flights to Cordobafrom $623
Flights to Mendozafrom $470
Flights to Puerto Iguazúfrom $889
Flights to El Calafatefrom $1,079
Flights to Ushuaiafrom $852
Flights to San Carlos de Barilochefrom $733
Flights to Saltafrom $837
Flights to San Miguel de Tucumánfrom $840
Flights to Rosariofrom $622
Flights to Jujuyfrom $2,732
Flights to Mar del Platafrom $1,066