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Cheap flights from St. Louis to Argentina from $397

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 12/1. 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
5:17 pm - 4:00 pmSTL-AEP
19h 43m2 stops
LATAM Airlines Logo
10:35 am - 9:59 amAEP-STL
26h 24m2 stops
$830LATAM Airlines
Find Deal
Tue, Nov 18 - Wed, Nov 26
Delta Logo
9:33 am - 9:00 amSTL-EZE
20h 27m1 stop
Delta Logo
8:55 pm - 1:56 pmEZE-STL
20h 01m1 stop
$830Delta
Find Deal
Tue, Nov 18 - Wed, Nov 26
United Airlines Logo
6:15 am - 7:20 amSTL-EZE
22h 05m1 stop
United Airlines Logo
11:55 pm - 6:47 pmEZE-STL
21h 52m1 stop
$930United Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
United Airlines Logo
6:30 am - 7:20 amSTL-EZE
21h 50m2 stops
United Airlines Logo
10:05 pm - 6:47 pmEZE-STL
23h 42m1 stop
$934United Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
American Airlines Logo
5:15 am - 7:05 amSTL-EZE
22h 50m1 stop
American Airlines Logo
11:59 pm - 10:05 pmEZE-STL
25h 06m1 stop
$940American Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
American Airlines Logo
11:06 am - 8:10 amSTL-EZE
18h 04m2 stops
American Airlines Logo
11:59 pm - 10:05 pmEZE-STL
25h 06m1 stop
$945American Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
GOL Logo
11:30 am - 12:50 pmSTL-EZE
23h 20m2 stops
GOL Logo
3:30 am - 10:04 pmEZE-STL
20h 34m2 stops
$1,243GOL
Find Deal
Sun, Mar 8 - Mon, Mar 16
Multiple Airlines Logo
11:08 am - 1:35 amSTL-EZE
35h 27m2 stops
Multiple Airlines Logo
7:45 am - 3:29 pmEZE-STL
34h 44m3 stops
$1,261Multiple Airlines
Find Deal
Sun, Nov 23 - Thu, Nov 27
Multiple Airlines Logo
4:05 pm - 1:35 amSTL-EZE
30h 30m3 stops
Multiple Airlines Logo
7:45 am - 3:29 pmEZE-STL
34h 44m3 stops
$1,368Multiple Airlines
Find Deal
Sun, Nov 23 - Thu, Nov 27
GOL Logo
10:00 am - 12:45 pmSTL-EZE
23h 45m2 stops
GOL Logo
3:30 am - 10:05 pmEZE-STL
21h 35m2 stops
$1,742GOL
Find Deal
Sat, Jan 17 - Sat, Jan 24

United Airlines flights from St. Louis to Argentina

Our best United Airlines deals on St. Louis to Argentina flight tickets
United Airlines
Nov 14
STL6:15 amLambert-St Louis
22h 05m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 16
EZE11:55 pmBuenos Aires Ministro Pistarini
21h 52m
1 stop
STL6:47 pmLambert-St Louis
$930
Find similar
United Airlines
Nov 14
STL6:30 amLambert-St Louis
21h 50m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 16
EZE10:05 pmBuenos Aires Ministro Pistarini
23h 42m
1 stop
STL6:47 pmLambert-St Louis
$934
Find similar
United Airlines
Dec 8
STL4:45 pmLambert-St Louis
13h 35m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 12
EZE11:55 pmBuenos Aires Ministro Pistarini
19h 09m
1 stop
STL4:04 pmLambert-St Louis
$1,254
Find similar

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Nov 18
STL9:33 amLambert-St Louis
20h 27m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Nov 26
EZE8:55 pmBuenos Aires Ministro Pistarini
20h 01m
1 stop
STL1:56 pmLambert-St Louis
$830
Find similar
Delta
Mar 8
STL7:30 amLambert-St Louis
20h 35m
2 stops
EZE6:05 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
20h 06m
1 stop
STL3:01 pmLambert-St Louis
$880
Find similar
Delta
Mar 8
STL4:00 pmLambert-St Louis
13h 20m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE10:25 pmBuenos Aires Ministro Pistarini
20h 30m
2 stops
STL4:55 pmLambert-St Louis
$884
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 October 22, 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 - AEP

STLAEP

Lambert-St Louis

Tue 11/18

5:17 pm-4:00 pm

2 stops19h 43m

Buenos Aires Jorge Newbery

Wed 11/26

10:35 am-9:59 am

2 stops26h 24m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

9:33 am-9:00 am

1 stop20h 27m

Buenos Aires Ministro Pistarini

Wed 11/26

8:55 pm-1:56 pm

1 stop20h 01m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 11/14

6:15 am-7:20 am

1 stop22h 05m

Buenos Aires Ministro Pistarini

Sun 11/16

11:55 pm-6:47 pm

1 stop21h 52m

$930

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 11/14

6:30 am-7:20 am

2 stops21h 50m

Buenos Aires Ministro Pistarini

Sun 11/16

10:05 pm-6:47 pm

1 stop23h 42m

$934

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

5:15 am-7:05 am

1 stop22h 50m

Buenos Aires Ministro Pistarini

Sun 1/25

11:59 pm-10:05 pm

1 stop25h 06m

$940

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

11:06 am-8:10 am

2 stops18h 04m

Buenos Aires Ministro Pistarini

Sun 1/25

11:59 pm-10:05 pm

1 stop25h 06m

$945

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

11:30 am-12:50 pm

2 stops23h 20m

Buenos Aires Ministro Pistarini

Mon 3/16

3:30 am-10:04 pm

2 stops20h 34m

$1,243

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 11/23

11:08 am-1:35 am

2 stops35h 27m

Buenos Aires Ministro Pistarini

Thu 11/27

7:45 am-3:29 pm

3 stops34h 44m

$1,261

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 11/23

4:05 pm-1:35 am

3 stops30h 30m

Buenos Aires Ministro Pistarini

Thu 11/27

7:45 am-3:29 pm

3 stops34h 44m

$1,368

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

10:00 am-12:45 pm

2 stops23h 45m

Buenos Aires Ministro Pistarini

Sat 1/24

3:30 am-10:05 pm

2 stops21h 35m

$1,742

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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

Direct flights

None
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
United AirlinesPriceFrom $1,023Free CancellationRating
7.4
8,988 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,023Free CancellationRating
7.2
11,029 reviews
Search American Airlines flights
DeltaPriceFrom $1,023Free CancellationRating
7.9
7,981 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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