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Cheap flights from St. Louis to Argentina from $956

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 3/8. 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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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 39m2 stops
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m1 stop
$956United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:04 pm - 5:00 pm
STL
-
AEP
26h 56m2 stops
LATAM Airlines Logo
11:30 am - 9:05 am
AEP
-
STL
23h 35m2 stops
$1,013LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
6:04 am - 7:20 am
STL
-
EZE
23h 16m1 stop
LATAM Airlines Logo
8:55 pm - 11:09 am
EZE
-
STL
16h 14m1 stop
$1,013LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
10:07 am - 7:20 am
STL
-
EZE
18h 13m1 stop
United Airlines Logo
11:55 pm - 3:52 pm
EZE
-
STL
18h 57m1 stop
$1,101United Airlines
Mon, Feb 2 - Mon, Feb 9
LATAM Airlines Logo
10:13 am - 6:05 am
STL
-
EZE
16h 52m2 stops
LATAM Airlines Logo
7:45 am - 8:52 am
EZE
-
STL
27h 07m2 stops
$1,102LATAM Airlines
Thu, Mar 5 - Mon, Mar 9
LATAM Airlines Logo
5:00 pm - 8:55 pm
STL
-
EZE
24h 55m2 stops
LATAM Airlines Logo
12:00 pm - 8:52 am
EZE
-
STL
22h 52m2 stops
$1,104LATAM Airlines
Sat, Mar 7 - Sat, Mar 14
United Airlines Logo
1:15 pm - 9:20 am
STL
-
EZE
17h 05m2 stops
United Airlines Logo
11:55 pm - 5:43 pm
EZE
-
STL
20h 48m2 stops
$1,105United Airlines
Mon, Feb 2 - Mon, Feb 9
LATAM Airlines Logo
12:22 pm - 2:00 pm
STL
-
AEP
23h 38m2 stops
LATAM Airlines Logo
3:40 pm - 10:45 am
AEP
-
STL
21h 05m2 stops
$1,126LATAM Airlines
Fri, Apr 10 - Tue, Apr 14
LATAM Airlines Logo
3:58 pm - 2:45 pm
STL
-
EZE
20h 47m2 stops
LATAM Airlines Logo
7:35 am - 11:38 pm
EZE
-
STL
18h 03m2 stops
$1,126LATAM Airlines
Fri, Apr 10 - Tue, Apr 14
Multiple Airlines Logo
4:05 pm - 5:20 pm
STL
-
AEP
22h 15m3 stops
Multiple Airlines Logo
4:20 pm - 3:29 pm
AEP
-
STL
26h 09m2 stops
$1,530Multiple Airlines
Wed, Feb 4 - Wed, Feb 11

United Airlines flights from St. Louis to Argentina

Our best United Airlines deals on St. Louis to Argentina flight tickets
United Airlines
Mar 8
STL7:41 amLambert-St Louis
46h 39m
2 stops
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE9:05 pmBuenos Aires Ministro Pistarini
14h 16m
1 stop
STL9:21 amLambert-St Louis
$956
Find similar
United Airlines
Feb 2
STL10:07 amLambert-St Louis
18h 13m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Feb 9
EZE11:55 pmBuenos Aires Ministro Pistarini
18h 57m
1 stop
STL3:52 pmLambert-St Louis
$1,101
Find similar
United Airlines
Feb 2
STL10:07 amLambert-St Louis
18h 13m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Feb 9
EZE11:55 pmBuenos Aires Ministro Pistarini
19h 08m
2 stops
STL4:03 pmLambert-St Louis
$1,105
Find similar

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Apr 19
STL1:11 pmLambert-St Louis
18h 34m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Apr 25
EZE8:10 pmBuenos Aires Ministro Pistarini
14h 20m
1 stop
STL8:30 amLambert-St Louis
$1,182
Find similar
Delta
Jan 17
STL12:00 pmLambert-St Louis
19h 15m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Jan 25
EZE10:25 pmBuenos Aires Ministro Pistarini
21h 12m
2 stops
STL4:37 pmLambert-St Louis
$1,260
Find similar
Delta
Feb 9
STL9:59 amLambert-St Louis
20h 01m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 6
EZE8:55 pmBuenos Aires Ministro Pistarini
15h 11m
1 stop
STL9:06 amLambert-St Louis
$1,358
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 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 - 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

$956

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

11:30 am-9:05 am

2 stops23h 35m

$1,013

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

6:04 am-7:20 am

1 stop23h 16m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-11:09 am

1 stop16h 14m

$1,013

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/2

10:07 am-7:20 am

1 stop18h 13m

Buenos Aires Ministro Pistarini

Mon 2/9

11:55 pm-3:52 pm

1 stop18h 57m

$1,101

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 3/5

10:13 am-6:05 am

2 stops16h 52m

Buenos Aires Ministro Pistarini

Mon 3/9

7:45 am-8:52 am

2 stops27h 07m

$1,102

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 3/7

5:00 pm-8:55 pm

2 stops24h 55m

Buenos Aires Ministro Pistarini

Sat 3/14

12:00 pm-8:52 am

2 stops22h 52m

$1,104

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/2

1:15 pm-9:20 am

2 stops17h 05m

Buenos Aires Ministro Pistarini

Mon 2/9

11:55 pm-5:43 pm

2 stops20h 48m

$1,105

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 4/10

12:22 pm-2:00 pm

2 stops23h 38m

Buenos Aires Jorge Newbery

Tue 4/14

3:40 pm-10:45 am

2 stops21h 05m

$1,126

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 4/10

3:58 pm-2:45 pm

2 stops20h 47m

Buenos Aires Ministro Pistarini

Tue 4/14

7:35 am-11:38 pm

2 stops18h 03m

$1,126

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 2/4

4:05 pm-5:20 pm

3 stops22h 15m

Buenos Aires Jorge Newbery

Wed 2/11

4:20 pm-3:29 pm

2 stops26h 09m

$1,530

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

15h 47m

Direct flights

None
The fastest flight from St. Louis to Argentina takes 15h 47m
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
8,014 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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