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Cheap flights from St. Louis to Buenos Aires from $482

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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Cheap round-trip flights

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LATAM Airlines Logo
6:00 am - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
22h 35m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
9:30 pm - 6:01 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
23h 31m1 stop Atlanta Hartsfield-Jackson
$1,153LATAM Airlines
Mon, Feb 15 - Mon, Feb 22
LATAM Airlines Logo
3:40 pm - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
15h 00m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
7:20 am - 11:39 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 19m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,158LATAM Airlines
Mon, Feb 15 - Mon, Feb 22
LATAM Airlines Logo
6:00 am - 10:55 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
25h 55m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl
LATAM Airlines Logo
8:05 pm - 11:39 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
30h 34m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson
$1,172LATAM Airlines
Mon, Feb 15 - Mon, Feb 22
Multiple Airlines Logo
6:44 pm - 4:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
30h 36m3 stops Atlanta Hartsfield-Jackson Miami Punta Cana
Multiple Airlines Logo
7:35 am - 3:26 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
34h 51m3 stops Punta Cana Cancun Toronto Pearson Intl
$1,220Multiple Airlines
Mon, Nov 9 - Thu, Nov 19
United Airlines Logo
6:15 am - 9:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 05m1 stop Houston George Bush Intcntl
United Airlines Logo
10:05 pm - 6:38 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
23h 33m1 stop Houston George Bush Intcntl
$1,233United Airlines
Thu, Nov 12 - Thu, Nov 19
United Airlines Logo
7:30 am - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
20h 50m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
10:05 pm - 12:10 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
17h 05m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
$1,237United Airlines
Thu, Nov 12 - Thu, Nov 19
American Airlines Logo
3:45 pm - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 45m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 pm - 2:04 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 34m1 stop Dallas/Fort Worth
$1,248American Airlines
Fri, Jan 29 - Sat, Feb 13
American Airlines Logo
9:41 am - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
19h 49m1 stop Dallas/Fort Worth
American Airlines Logo
9:40 pm - 12:46 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 06m2 stops Miami Charlotte Douglas
$1,252American Airlines
Fri, Jan 29 - Sat, Feb 13
Delta Logo
5:35 pm - 9:45 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 10m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:35 am - 11:54 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 19m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,298Delta
Thu, Oct 8 - Wed, Oct 21
Delta Logo
12:00 pm - 9:45 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
19h 45m1 stop Atlanta Hartsfield-Jackson
Delta Logo
3:55 am - 11:54 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
21h 59m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,298Delta
Thu, Oct 8 - Mon, Oct 19

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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
Feb 15
STL6:00 amLambert-St Louis
22h 35m
1 stop
EZE7:35 amBuenos Aires Ministro Pistarini
Feb 22
EZE9:30 pmBuenos Aires Ministro Pistarini
23h 31m
1 stop
STL6:01 pmLambert-St Louis
$1,153
LATAM Airlines
Feb 15
STL3:40 pmLambert-St Louis
15h 00m
1 stop
EZE9:40 amBuenos Aires Ministro Pistarini
Feb 22
EZE7:20 amBuenos Aires Ministro Pistarini
19h 19m
2 stops
STL11:39 pmLambert-St Louis
$1,158
LATAM Airlines
Feb 15
STL6:00 amLambert-St Louis
25h 55m
2 stops
EZE10:55 amBuenos Aires Ministro Pistarini
Feb 22
EZE8:05 pmBuenos Aires Ministro Pistarini
30h 34m
2 stops
STL11:39 pmLambert-St Louis
$1,172

American Airlines flights from St. Louis to Buenos Aires

Our best American Airlines deals on St. Louis to Buenos Aires flight tickets
American Airlines
Mar 28
STL11:19 amLambert-St Louis
19h 31m
1 stop
EZE8:50 amBuenos Aires Ministro Pistarini
Apr 10
EZE8:45 pmBuenos Aires Ministro Pistarini
14h 35m
1 stop
STL9:20 amLambert-St Louis
$1,295
American Airlines
Mar 28
STL11:19 amLambert-St Louis
19h 31m
1 stop
EZE8:50 amBuenos Aires Ministro Pistarini
Apr 10
EZE8:45 pmBuenos Aires Ministro Pistarini
14h 35m
1 stop
STL9:20 amLambert-St Louis
$1,350
American Airlines
Dec 10
STL10:35 amLambert-St Louis
18h 30m
1 stop
EZE8:05 amBuenos Aires Ministro Pistarini
Dec 19
EZE11:20 pmBuenos Aires Ministro Pistarini
15h 16m
1 stop
STL11:36 amLambert-St Louis
$1,457

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/15

6:00 am-7:35 am

1 stop22h 35m

Buenos Aires Ministro Pistarini

Mon 2/22

9:30 pm-6:01 pm

1 stop23h 31m

$1,153

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/15

3:40 pm-9:40 am

1 stop15h 00m

Buenos Aires Ministro Pistarini

Mon 2/22

7:20 am-11:39 pm

2 stops19h 19m

$1,158

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/15

6:00 am-10:55 am

2 stops25h 55m

Buenos Aires Ministro Pistarini

Mon 2/22

8:05 pm-11:39 pm

2 stops30h 34m

$1,172

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 11/9

6:44 pm-4:20 am

3 stops30h 36m

Buenos Aires Ministro Pistarini

Thu 11/19

7:35 am-3:26 pm

3 stops34h 51m

$1,220

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 11/12

6:15 am-9:20 am

1 stop24h 05m

Buenos Aires Ministro Pistarini

Thu 11/19

10:05 pm-6:38 pm

1 stop23h 33m

$1,233

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 11/12

7:30 am-7:20 am

2 stops20h 50m

Buenos Aires Ministro Pistarini

Thu 11/19

10:05 pm-12:10 pm

2 stops17h 05m

$1,237
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Fri 1/29

3:45 pm-8:30 am

1 stop13h 45m

Buenos Aires Ministro Pistarini

Sat 2/13

10:30 pm-2:04 pm

1 stop18h 34m

$1,248

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Fri 1/29

9:41 am-8:30 am

1 stop19h 49m

Buenos Aires Ministro Pistarini

Sat 2/13

9:40 pm-12:46 pm

2 stops18h 06m

$1,252

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 10/8

5:35 pm-9:45 am

1 stop14h 10m

Buenos Aires Ministro Pistarini

Wed 10/21

7:35 am-11:54 pm

2 stops18h 19m

$1,298

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 10/8

12:00 pm-9:45 am

1 stop19h 45m

Buenos Aires Ministro Pistarini

Mon 10/19

3:55 am-11:54 pm

2 stops21h 59m

$1,298

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 $431, 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 June instead. Flights to Buenos Aires in June, while not as cheap as those in November, still average around $1,109.

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

$482

Fastest flight time

16h 29m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $482. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,153.
The fastest flight from St. Louis to Buenos Aires takes 16h 29m
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 16h 29m 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
DeltaPriceFrom $431Free CancellationRating
7.8
8,610 reviews
Search Delta flights
LATAM AirlinesPriceFrom $884Free CancellationRating
7.4
1,977 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.0
12,096 reviews
Search American Airlines 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