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Cheap flights from St. Louis to Argentina from $383

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 12/13. 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.
Delta Logo
10:00 am - 7:20 amSTL-EZE
19h 20m1 stop
Delta Logo
8:55 pm - 11:50 amEZE-STL
16h 55m1 stop
$880Delta
Find Deal
Sun, Mar 8 - Tue, Mar 17
Delta Logo
10:00 am - 9:00 amSTL-EZE
21h 00m1 stop
Delta Logo
10:25 pm - 4:55 pmEZE-STL
20h 30m2 stops
$884Delta
Find Deal
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:00 pm - 9:35 amSTL-EZE
18h 35m2 stops
LATAM Airlines Logo
7:45 am - 11:39 pmEZE-STL
18h 54m2 stops
$1,001LATAM Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
LATAM Airlines Logo
1:00 pm - 9:35 amSTL-EZE
18h 35m2 stops
LATAM Airlines Logo
8:00 am - 11:40 pmEZE-STL
17h 40m2 stops
$1,009LATAM Airlines
Find Deal
Wed, Mar 11 - Mon, Mar 23
United Airlines Logo
10:07 am - 9:20 amSTL-EZE
20h 13m1 stop
United Airlines Logo
10:55 pm - 3:54 pmEZE-STL
18h 59m1 stop
$1,026United Airlines
Find Deal
Tue, Feb 10 - Mon, Mar 9
United Airlines Logo
9:57 am - 9:20 amSTL-EZE
20h 23m2 stops
United Airlines Logo
9:05 pm - 2:31 pmEZE-STL
19h 26m2 stops
$1,030United Airlines
Find Deal
Mon, Feb 9 - Mon, Mar 9
LATAM Airlines Logo
1:00 pm - 9:35 amSTL-EZE
18h 35m2 stops
LATAM Airlines Logo
7:45 am - 9:04 amEZE-STL
27h 19m3 stops
$1,033LATAM Airlines
Find Deal
Wed, Mar 11 - Mon, Mar 23
United Airlines Logo
4:35 pm - 7:20 amSTL-EZE
35h 45m1 stop
United Airlines Logo
10:05 pm - 3:54 pmEZE-STL
20h 49m1 stop
$1,035United Airlines
Find Deal
Sun, Feb 8 - Thu, Mar 5
United Airlines Logo
4:35 pm - 7:20 amSTL-EZE
35h 45m1 stop
United Airlines Logo
10:05 pm - 2:31 pmEZE-STL
19h 26m2 stops
$1,039United Airlines
Find Deal
Sun, Feb 8 - Thu, Mar 5
United Airlines Logo
8:00 am - 8:20 amSTL-EZE
46h 20m2 stops
United Airlines Logo
9:05 pm - 9:24 amEZE-STL
14h 19m1 stop
$1,047United Airlines
Find Deal
Sun, Mar 8 - Tue, Mar 17

Air Canada flights from St. Louis to Argentina

Our best Air Canada deals on St. Louis to Argentina flight tickets
Air Canada
Feb 7
STL4:05 pmLambert-St Louis
20h 05m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Mar 4
EZE4:45 pmBuenos Aires Ministro Pistarini
25h 44m
2 stops
STL3:29 pmLambert-St Louis
$1,234
Find similar
Air Canada
Feb 10
STL4:05 pmLambert-St Louis
20h 05m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Mar 6
EZE4:45 pmBuenos Aires Ministro Pistarini
25h 44m
2 stops
STL3:29 pmLambert-St Louis
$1,269
Find similar
Air Canada
Feb 7
STL4:05 pmLambert-St Louis
20h 05m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Mar 6
EZE4:45 pmBuenos Aires Ministro Pistarini
25h 44m
2 stops
STL3:29 pmLambert-St Louis
$1,294
Find similar

Delta flights from St. Louis to Argentina

Our best Delta deals on St. Louis to Argentina flight tickets
Delta
Mar 8
STL10:00 amLambert-St Louis
19h 20m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
16h 55m
1 stop
STL11:50 amLambert-St Louis
$880
Find similar
Delta
Mar 8
STL10:00 amLambert-St Louis
21h 00m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 17
EZE10:25 pmBuenos Aires Ministro Pistarini
20h 30m
2 stops
STL4:55 pmLambert-St Louis
$884
Find similar
Delta
Feb 6
STL3:45 pmLambert-St Louis
12h 35m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 3
EZE4:05 amBuenos Aires Ministro Pistarini
22h 33m
2 stops
STL11:38 pmLambert-St Louis
$1,066
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 13, 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

10:00 am-7:20 am

1 stop19h 20m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-11:50 am

1 stop16h 55m

$880

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

10:00 am-9:00 am

1 stop21h 00m

Buenos Aires Ministro Pistarini

Tue 3/17

10:25 pm-4:55 pm

2 stops20h 30m

$884

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

12:00 pm-9:35 am

2 stops18h 35m

Buenos Aires Ministro Pistarini

Sun 1/25

7:45 am-11:39 pm

2 stops18h 54m

$1,001

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 3/11

1:00 pm-9:35 am

2 stops18h 35m

Buenos Aires Ministro Pistarini

Mon 3/23

8:00 am-11:40 pm

2 stops17h 40m

$1,009

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 2/10

10:07 am-9:20 am

1 stop20h 13m

Buenos Aires Ministro Pistarini

Mon 3/9

10:55 pm-3:54 pm

1 stop18h 59m

$1,026

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/9

9:57 am-9:20 am

2 stops20h 23m

Buenos Aires Ministro Pistarini

Mon 3/9

9:05 pm-2:31 pm

2 stops19h 26m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 3/11

1:00 pm-9:35 am

2 stops18h 35m

Buenos Aires Ministro Pistarini

Mon 3/23

7:45 am-9:04 am

3 stops27h 19m

$1,033

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/8

4:35 pm-7:20 am

1 stop35h 45m

Buenos Aires Ministro Pistarini

Thu 3/5

10:05 pm-3:54 pm

1 stop20h 49m

$1,035

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 2/8

4:35 pm-7:20 am

1 stop35h 45m

Buenos Aires Ministro Pistarini

Thu 3/5

10:05 pm-2:31 pm

2 stops19h 26m

$1,039

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

8:00 am-8:20 am

2 stops46h 20m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-9:24 am

1 stop14h 19m

$1,047

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

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
11,051 reviews
Search American Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,007 reviews
Search Delta flights
United AirlinesPriceFrom $1,081Free CancellationRating
7.4
9,017 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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