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Cheap flights from St. Louis to Buenos Aires from $593

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
6:00 am - 8:30 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
23h 30m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
5:35 pm - 11:15 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 40m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Thu, Nov 12 - Thu, Nov 19
LATAM Airlines Logo
10:05 am - 8:30 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
19h 25m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
3:50 pm - 4:43 pmAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
27h 53m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Tue, Nov 10 - Tue, Nov 17
Delta Logo
10:05 am - 4:00 pmSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
26h 55m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:35 pm - 11:15 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 40m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148Delta
Tue, Nov 10 - Tue, Nov 17
Delta Logo
12:29 pm - 4:00 pmSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
24h 31m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:35 pm - 11:15 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 40m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148Delta
Mon, Nov 9 - Thu, Nov 19
LATAM Airlines Logo
5:30 pm - 4:00 pmSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
19h 30m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
3:50 pm - 11:15 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
22h 25m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Mon, Nov 9 - Wed, Nov 18
United Airlines Logo
5:55 pm - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
34h 25m1 stop Houston George Bush Intcntl
United Airlines Logo
11:55 pm - 2:05 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
17h 10m1 stop Houston George Bush Intcntl
$1,198United Airlines
Sat, Jan 16 - Mon, Jan 25
United Airlines Logo
5:55 pm - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
34h 25m1 stop Houston George Bush Intcntl
United Airlines Logo
11:55 pm - 4:53 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 58m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
$1,202United Airlines
Sat, Jan 16 - Mon, Jan 25
American Airlines Logo
5:00 am - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 30m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 pm - 12:32 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
17h 02m1 stop Dallas/Fort Worth
$1,298American Airlines
Thu, Feb 11 - Wed, Mar 3
American Airlines Logo
5:29 am - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 01m1 stop Dallas/Fort Worth
American Airlines Logo
10:10 am - 10:05 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 55m1 stop Miami
$1,308American Airlines
Fri, Jan 29 - Sat, Feb 13
Delta Logo
9:52 am - 9:50 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
20h 58m2 stops Atlanta Hartsfield-Jackson Miami
Delta Logo
11:35 pm - 11:39 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
27h 04m1 stop Atlanta Hartsfield-Jackson
$1,856Delta
Mon, Dec 21 - Wed, Jan 6

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LATAM Airlines flights from St. Louis to Buenos Aires

Our best LATAM Airlines deals on St. Louis to Buenos Aires flight tickets
LATAM Airlines
Dec 10
STL10:06 amLambert-St Louis
21h 34m
2 stops
EZE10:40 amBuenos Aires Ministro Pistarini
Dec 19
EZE12:50 pmBuenos Aires Ministro Pistarini
30h 38m
2 stops
STL4:28 pmLambert-St Louis
$1,188
LATAM Airlines
Jan 16
STL3:40 pmLambert-St Louis
12h 55m
1 stop
EZE7:35 amBuenos Aires Ministro Pistarini
Jan 25
EZE8:05 pmBuenos Aires Ministro Pistarini
30h 34m
2 stops
STL11:39 pmLambert-St Louis
$1,192
LATAM Airlines
Sep 23
STL10:05 amLambert-St Louis
20h 25m
2 stops
AEP8:30 amBuenos Aires Jorge Newbery
Oct 4
AEP5:35 pmBuenos Aires Jorge Newbery
26h 10m
2 stops
STL5:45 pmLambert-St Louis
$1,248

American Airlines flights from St. Louis to Buenos Aires

Our best American Airlines deals on St. Louis to Buenos Aires flight tickets
American Airlines
Feb 11
STL5:00 amLambert-St Louis
24h 30m
1 stop
EZE8:30 amBuenos Aires Ministro Pistarini
Mar 3
EZE10:30 pmBuenos Aires Ministro Pistarini
17h 02m
1 stop
STL12:32 pmLambert-St Louis
$1,298
American Airlines
Jan 29
STL5:17 amLambert-St Louis
24h 13m
1 stop
EZE8:30 amBuenos Aires Ministro Pistarini
Feb 13
EZE10:10 amBuenos Aires Ministro Pistarini
14h 55m
1 stop
STL10:05 pmLambert-St Louis
$1,308
American Airlines
Jan 29
STL9:51 amLambert-St Louis
19h 39m
1 stop
EZE8:30 amBuenos Aires Ministro Pistarini
Feb 13
EZE9:40 pmBuenos Aires Ministro Pistarini
18h 06m
2 stops
STL12:46 pmLambert-St Louis
$1,312

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Buenos Aires that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Thu 11/12

6:00 am-8:30 am

2 stops23h 30m

Buenos Aires Jorge Newbery

Thu 11/19

5:35 pm-11:15 am

2 stops20h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Tue 11/10

10:05 am-8:30 am

2 stops19h 25m

Buenos Aires Jorge Newbery

Tue 11/17

3:50 pm-4:43 pm

2 stops27h 53m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Tue 11/10

10:05 am-4:00 pm

2 stops26h 55m

Buenos Aires Jorge Newbery

Tue 11/17

5:35 pm-11:15 am

2 stops20h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Mon 11/9

12:29 pm-4:00 pm

2 stops24h 31m

Buenos Aires Jorge Newbery

Thu 11/19

5:35 pm-11:15 am

2 stops20h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Mon 11/9

5:30 pm-4:00 pm

2 stops19h 30m

Buenos Aires Jorge Newbery

Wed 11/18

3:50 pm-11:15 am

2 stops22h 25m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Sat 1/16

5:55 pm-7:20 am

1 stop34h 25m

Buenos Aires Ministro Pistarini

Mon 1/25

11:55 pm-2:05 pm

1 stop17h 10m

$1,198

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Sat 1/16

5:55 pm-7:20 am

1 stop34h 25m

Buenos Aires Ministro Pistarini

Mon 1/25

11:55 pm-4:53 pm

2 stops19h 58m

$1,202

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 2/11

5:00 am-8:30 am

1 stop24h 30m

Buenos Aires Ministro Pistarini

Wed 3/3

10:30 pm-12:32 pm

1 stop17h 02m

$1,298
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Fri 1/29

5:29 am-8:30 am

1 stop24h 01m

Buenos Aires Ministro Pistarini

Sat 2/13

10:10 am-10:05 pm

1 stop14h 55m

$1,308

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 12/21

9:52 am-9:50 am

2 stops20h 58m

Buenos Aires Ministro Pistarini

Wed 1/6

11:35 pm-11:39 pm

1 stop27h 04m

$1,856

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Buenos Aires

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 Buenos Aires?

The cheapest month to fly to Buenos Aires from St. Louis is in November. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Buenos Aires from St. Louis during March instead. Flights to Buenos Aires in March, while not as cheap as those in November, still average around $1,181.

Can stopping save me money on St. Louis to Buenos Aires flights?

You could potentially save up to 8% on your flight if you consider stops on a St. Louis to Buenos Aires flight.

When to book flights from St. Louis to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Buenos Aires 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 (STL to BUE) flight deals and tips

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

Best Price Found

$593

Fastest flight time

14h 48m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $593. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,148.
The fastest flight from St. Louis to Buenos Aires takes 14h 48m
There are no direct flights from St. Louis to Buenos Aires. There are no popular flight routes from St. Louis to Buenos Aires.
Search flight deals

Frequently asked questions about flying from St. Louis to Buenos Aires

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

    The straight-line distance from Lambert-St Louis to Buenos Aires is 5450.9 mi. Typically, this will take 14h 48m by plane in normal conditions.

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

    Prices for flights from Lambert-St Louis Airport to Buenos Aires are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Buenos Aires?

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

    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 Buenos Aires.

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

    The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Buenos Aires?

Best airlines flying from St. Louis to Buenos Aires

Compare and see reviews for airlines that fly from St. Louis to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
LATAM AirlinesPriceFrom $884Free CancellationRating
7.4
1,981 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.0
12,075 reviews
Search American Airlines flights
DeltaPriceFrom $1,147Free CancellationRating
7.8
8,593 reviews
Search Delta flights

Why use momondo?

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

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 Buenos Aires from St. Louis.

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

Yes. All flights to Buenos Aires from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Buenos Aires from St. Louis.

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

Yes momondo offers price alerts on flights to Buenos Aires from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport