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Cheap flights from St. Louis to Argentina from $487

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 12/12. 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
9:33 am - 7:55 amSTL-AEP
19h 22m2 stops
LATAM Airlines Logo
12:40 pm - 6:35 pmAEP-STL
32h 55m2 stops
$830LATAM Airlines
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Tue, Nov 18 - Wed, Nov 26
Delta Logo
7:10 am - 9:00 amSTL-EZE
22h 50m1 stop
Delta Logo
4:05 am - 11:38 pmEZE-STL
22h 33m2 stops
$830Delta
Find Deal
Mon, Feb 16 - Wed, Mar 4
Delta Logo
6:35 am - 10:15 amSTL-EZE
24h 40m2 stops
Delta Logo
8:55 pm - 11:50 amEZE-STL
16h 55m1 stop
$834Delta
Find Deal
Wed, Feb 18 - Mon, Mar 9
United Airlines Logo
4:39 pm - 7:20 amSTL-EZE
35h 41m1 stop
United Airlines Logo
11:55 pm - 3:54 pmEZE-STL
18h 59m1 stop
$838United Airlines
Find Deal
Sun, Feb 15 - Thu, Mar 5
United Airlines Logo
4:39 pm - 7:20 amSTL-EZE
35h 41m1 stop
United Airlines Logo
10:05 pm - 2:31 pmEZE-STL
19h 26m2 stops
$842United Airlines
Find Deal
Sun, Feb 15 - Thu, Mar 5
United Airlines Logo
4:39 pm - 7:20 amSTL-EZE
35h 41m1 stop
United Airlines Logo
10:55 pm - 10:13 pmEZE-STL
25h 18m1 stop
$846United Airlines
Find Deal
Sun, Feb 15 - Mon, Mar 9
American Airlines Logo
1:40 pm - 9:10 amSTL-EZE
16h 30m2 stops
American Airlines Logo
10:25 pm - 4:14 pmEZE-STL
20h 49m1 stop
$934American Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
American Airlines Logo
5:07 pm - 10:10 amSTL-EZE
14h 03m1 stop
American Airlines Logo
10:25 pm - 11:05 amEZE-STL
15h 40m1 stop
$980American Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
Multiple Airlines Logo
4:05 pm - 5:00 amSTL-AEP
33h 55m3 stops
Multiple Airlines Logo
10:35 am - 3:29 pmAEP-STL
31h 54m3 stops
$1,373Multiple Airlines
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Mon, Feb 23 - Fri, Mar 6
Multiple Airlines Logo
4:05 pm - 4:20 amSTL-AEP
33h 15m3 stops
Multiple Airlines Logo
1:40 pm - 3:29 pmAEP-STL
28h 49m3 stops
$1,463Multiple Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 18

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Feb 16
STL7:10 amLambert-St Louis
22h 50m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 4
EZE4:05 amBuenos Aires Ministro Pistarini
22h 33m
2 stops
STL11:38 pmLambert-St Louis
$830
Find similar
Delta
Feb 18
STL6:35 amLambert-St Louis
24h 40m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Mar 9
EZE8:55 pmBuenos Aires Ministro Pistarini
16h 55m
1 stop
STL11:50 amLambert-St Louis
$834
Find similar
Delta
Feb 13
STL3:47 pmLambert-St Louis
20h 08m
2 stops
EZE2:55 pmBuenos Aires Ministro Pistarini
Mar 10
EZE4:05 amBuenos Aires Ministro Pistarini
21h 35m
2 stops
STL11:40 pmLambert-St Louis
$880
Find similar

United Airlines flights from St. Louis to Argentina

Our best United Airlines deals on St. Louis to Argentina flight tickets
United Airlines
Feb 15
STL4:39 pmLambert-St Louis
35h 41m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 5
EZE11:55 pmBuenos Aires Ministro Pistarini
18h 59m
1 stop
STL3:54 pmLambert-St Louis
$838
Find similar
United Airlines
Feb 15
STL4:39 pmLambert-St Louis
35h 41m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 5
EZE10:05 pmBuenos Aires Ministro Pistarini
19h 26m
2 stops
STL2:31 pmLambert-St Louis
$842
Find similar
United Airlines
Feb 15
STL4:39 pmLambert-St Louis
35h 41m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 9
EZE10:55 pmBuenos Aires Ministro Pistarini
25h 18m
1 stop
STL10:13 pmLambert-St Louis
$846
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 November 6, 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

9:33 am-7:55 am

2 stops19h 22m

Buenos Aires Jorge Newbery

Wed 11/26

12:40 pm-6:35 pm

2 stops32h 55m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/16

7:10 am-9:00 am

1 stop22h 50m

Buenos Aires Ministro Pistarini

Wed 3/4

4:05 am-11:38 pm

2 stops22h 33m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 2/18

6:35 am-10:15 am

2 stops24h 40m

Buenos Aires Ministro Pistarini

Mon 3/9

8:55 pm-11:50 am

1 stop16h 55m

$834

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

4:39 pm-7:20 am

1 stop35h 41m

Buenos Aires Ministro Pistarini

Thu 3/5

11:55 pm-3:54 pm

1 stop18h 59m

$838

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

4:39 pm-7:20 am

1 stop35h 41m

Buenos Aires Ministro Pistarini

Thu 3/5

10:05 pm-2:31 pm

2 stops19h 26m

$842

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/15

4:39 pm-7:20 am

1 stop35h 41m

Buenos Aires Ministro Pistarini

Mon 3/9

10:55 pm-10:13 pm

1 stop25h 18m

$846

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

1:40 pm-9:10 am

2 stops16h 30m

Buenos Aires Ministro Pistarini

Sun 1/25

10:25 pm-4:14 pm

1 stop20h 49m

$934

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

5:07 pm-10:10 am

1 stop14h 03m

Buenos Aires Ministro Pistarini

Sun 1/25

10:25 pm-11:05 am

1 stop15h 40m

$980

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Mon 2/23

4:05 pm-5:00 am

3 stops33h 55m

Buenos Aires Jorge Newbery

Fri 3/6

10:35 am-3:29 pm

3 stops31h 54m

$1,373

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 2/4

4:05 pm-4:20 am

3 stops33h 15m

Buenos Aires Jorge Newbery

Wed 2/18

1:40 pm-3:29 pm

3 stops28h 49m

$1,463

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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
American AirlinesPriceFrom $1,023Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $1,081Free CancellationRating
7.4
9,007 reviews
Search United Airlines 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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