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Cheap flights from St. Louis to Buenos Aires from $937

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 Buenos Aires departing on 3/19. 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

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LATAM Airlines Logo
7:03 am - 7:55 am
STL
-
AEP
22h 52m
2 stops
LATAM Airlines Logo
12:40 pm - 11:09 am
AEP
-
STL
24h 29m
3 stops
$937LATAM Airlines
dj., març 19 - dj., març 26
LATAM Airlines Logo
5:21 pm - 7:55 am
STL
-
AEP
36h 34m
2 stops
LATAM Airlines Logo
5:00 pm - 11:09 am
AEP
-
STL
20h 09m
2 stops
$967LATAM Airlines
dc., març 18 - dc., març 25
LATAM Airlines Logo
6:59 pm - 6:40 pm
STL
-
AEP
21h 41m
2 stops
LATAM Airlines Logo
5:00 pm - 11:09 am
AEP
-
STL
20h 09m
2 stops
$1,003LATAM Airlines
dl., març 9 - dl., març 23
LATAM Airlines Logo
5:30 pm - 7:40 pm
STL
-
AEP
24h 10m
2 stops
LATAM Airlines Logo
5:05 pm - 10:41 am
AEP
-
STL
19h 36m
2 stops
$1,039LATAM Airlines
dt., ag. 4 - dt., ag. 25
LATAM Airlines Logo
5:30 pm - 2:50 pm
STL
-
AEP
19h 20m
2 stops
LATAM Airlines Logo
5:05 pm - 6:02 pm
AEP
-
STL
26h 57m
2 stops
$1,079LATAM Airlines
dv., juny 26 - dg., ag. 2
LATAM Airlines Logo
12:04 pm - 4:00 pm
STL
-
AEP
25h 56m
2 stops
LATAM Airlines Logo
8:50 am - 11:09 am
AEP
-
STL
28h 19m
2 stops
$1,109LATAM Airlines
dg., març 8 - dt., març 17
LATAM Airlines Logo
5:30 pm - 2:50 pm
STL
-
AEP
19h 20m
2 stops
LATAM Airlines Logo
3:40 pm - 9:40 am
AEP
-
STL
20h 00m
2 stops
$1,119LATAM Airlines
dv., juny 26 - dv., jul.. 31
LATAM Airlines Logo
7:09 pm - 5:00 pm
STL
-
AEP
19h 51m
2 stops
LATAM Airlines Logo
4:55 pm - 12:20 pm
AEP
-
STL
21h 25m
2 stops
$1,135LATAM Airlines
dl., maig 18 - dj., maig 21
LATAM Airlines Logo
11:42 am - 7:40 pm
STL
-
AEP
29h 58m
2 stops
LATAM Airlines Logo
5:05 pm - 10:34 am
AEP
-
STL
19h 29m
2 stops
$1,143LATAM Airlines
dj., abr. 30 - dl., maig 4
LATAM Airlines Logo
12:04 pm - 7:40 am
STL
-
AEP
17h 36m
2 stops
LATAM Airlines Logo
3:45 pm - 9:36 am
AEP
-
STL
19h 51m
2 stops
$1,166LATAM Airlines
dt., març 31 - dj., maig 7

LATAM Airlines flights from St. Louis to Buenos Aires Jorge Newbery Airport

Our best LATAM Airlines deals on St. Louis to Buenos Aires Jorge Newbery Airport flight tickets
LATAM Airlines
Mar 19
STL7:03 amLambert-St Louis
22h 52m
2 stops
AEP7:55 amBuenos Aires Jorge Newbery
Mar 26
AEP12:40 pmBuenos Aires Jorge Newbery
24h 29m
3 stops
STL11:09 amLambert-St Louis
$937
LATAM Airlines
Mar 18
STL5:21 pmLambert-St Louis
36h 34m
2 stops
AEP7:55 amBuenos Aires Jorge Newbery
Mar 25
AEP5:00 pmBuenos Aires Jorge Newbery
20h 09m
2 stops
STL11:09 amLambert-St Louis
$967
LATAM Airlines
Mar 9
STL6:59 pmLambert-St Louis
21h 41m
2 stops
AEP6:40 pmBuenos Aires Jorge Newbery
Mar 23
AEP5:00 pmBuenos Aires Jorge Newbery
20h 09m
2 stops
STL11:09 amLambert-St Louis
$1,003

Delta flights from St. Louis to Buenos Aires Jorge Newbery Airport

Our best Delta deals on St. Louis to Buenos Aires Jorge Newbery Airport flight tickets
Delta
Jun 25
STL5:00 pmLambert-St Louis
18h 15m
2 stops
AEP1:15 pmBuenos Aires Jorge Newbery
Jul 31
AEP3:40 pmBuenos Aires Jorge Newbery
20h 00m
2 stops
STL9:40 amLambert-St Louis
$4,232
Delta
Aug 11
STL1:30 pmLambert-St Louis
21h 45m
2 stops
AEP1:15 pmBuenos Aires Jorge Newbery
Aug 27
AEP3:40 pmBuenos Aires Jorge Newbery
21h 01m
2 stops
STL10:41 amLambert-St Louis
$4,396

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Buenos Aires Jorge Newbery Airport 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 febrer 19, 2026.
Use the filters below to find and compare flights from St. Louis to Buenos Aires Jorge Newbery Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dj. 3/19

7:03 am-7:55 am

2 stops22h 52m

Buenos Aires Jorge Newbery

dj. 3/26

12:40 pm-11:09 am

3 stops24h 29m

$937

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dc. 3/18

5:21 pm-7:55 am

2 stops36h 34m

Buenos Aires Jorge Newbery

dc. 3/25

5:00 pm-11:09 am

2 stops20h 09m

$967

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dl. 3/9

6:59 pm-6:40 pm

2 stops21h 41m

Buenos Aires Jorge Newbery

dl. 3/23

5:00 pm-11:09 am

2 stops20h 09m

$1,003

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dt. 8/4

5:30 pm-7:40 pm

2 stops24h 10m

Buenos Aires Jorge Newbery

dt. 8/25

5:05 pm-10:41 am

2 stops19h 36m

$1,039

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dv. 6/26

5:30 pm-2:50 pm

2 stops19h 20m

Buenos Aires Jorge Newbery

dg. 8/2

5:05 pm-6:02 pm

2 stops26h 57m

$1,079

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dg. 3/8

12:04 pm-4:00 pm

2 stops25h 56m

Buenos Aires Jorge Newbery

dt. 3/17

8:50 am-11:09 am

2 stops28h 19m

$1,109

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dv. 6/26

5:30 pm-2:50 pm

2 stops19h 20m

Buenos Aires Jorge Newbery

dv. 7/31

3:40 pm-9:40 am

2 stops20h 00m

$1,119

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dl. 5/18

7:09 pm-5:00 pm

2 stops19h 51m

Buenos Aires Jorge Newbery

dj. 5/21

4:55 pm-12:20 pm

2 stops21h 25m

$1,135

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dj. 4/30

11:42 am-7:40 pm

2 stops29h 58m

Buenos Aires Jorge Newbery

dl. 5/4

5:05 pm-10:34 am

2 stops19h 29m

$1,143

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

dt. 3/31

12:04 pm-7:40 am

2 stops17h 36m

Buenos Aires Jorge Newbery

dj. 5/7

3:45 pm-9:36 am

2 stops19h 51m

$1,166

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Buenos Aires Jorge Newbery Airport

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 airline that flies from Lambert-St Louis to Buenos Aires Jorge Newbery?

LATAM Airlines is the most popular carrier operating from Lambert-St Louis to Buenos Aires Jorge Newbery

When to book flights from St. Louis to Buenos Aires Jorge Newbery Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Buenos Aires Jorge Newbery Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Buenos Aires Jorge Newbery Airport (STL to AEP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Buenos Aires Jorge Newbery Airport

Fastest flight time

17h 36m

Direct flights

None
The fastest flight from St. Louis to Buenos Aires Jorge Newbery Airport takes 17h 36m
There are no direct flights from St. Louis to Buenos Aires Jorge Newbery Airport. There are no popular flight routes from St. Louis to Buenos Aires Jorge Newbery Airport.
Search flight deals

  • How far is Lambert-St Louis to Buenos Aires Jorge Newbery by plane?

    The distance between Lambert-St Louis and Buenos Aires Jorge Newbery is about 5446.6 mi. In terms of flight time, this usually takes a little over 17h 36m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Buenos Aires Jorge Newbery Airport?

    Prices for flights from Lambert-St Louis Airport to Buenos Aires Jorge Newbery Airport refresh daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Buenos Aires Jorge Newbery Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Buenos Aires Jorge Newbery Airport.

  • What documentation or ID do you need to fly to Buenos Aires Jorge Newbery Airport?

    The required travel and health documents for your Buenos Aires Jorge Newbery Airport 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 Buenos Aires Jorge Newbery Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Buenos Aires?

It is quick and easy to find St. Louis to Buenos Aires flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Buenos Aires that suits you.

Can I find flights from St. Louis to Buenos Aires with flexible booking policies on momondo?

Flights from St. Louis to Buenos Aires with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Buenos Aires?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Buenos Aires.

I’m not ready to book a flight from St. Louis to Buenos Aires right now. Can momondo alert me if prices change?

Price alerts on flights to Buenos Aires from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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