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Cheap flights from St. Louis to Buenos Aires from $493

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

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Multiple Airlines Logo
12:02 pm - 9:50 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
42h 48m2 stops Atlanta Hartsfield-Jackson Miami
Multiple Airlines Logo
5:20 am - 6:14 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 54m1 stop Punta Cana
$1,219Multiple Airlines
Fri, Dec 4 - Fri, Dec 11
Multiple Airlines Logo
6:00 am - 7:30 pmSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
34h 30m1 stop Cancun
Multiple Airlines Logo
2:40 pm - 11:17 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
47h 37m2 stops Miami Atlanta Hartsfield-Jackson
$1,242Multiple Airlines
Wed, Dec 2 - Wed, Dec 9
Delta Logo
11:51 am - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
18h 49m1 stop Atlanta Hartsfield-Jackson
Delta 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
$1,258Delta
Wed, Feb 24 - Wed, Mar 10
Delta Logo
9:00 am - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
21h 40m1 stop Atlanta Hartsfield-Jackson
Delta Logo
9:30 pm - 10:48 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 18m1 stop Atlanta Hartsfield-Jackson
$1,258Delta
Tue, Feb 23 - Tue, Mar 16
Delta Logo
3:40 pm - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
12h 55m1 stop Atlanta Hartsfield-Jackson
Delta 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
$1,258Delta
Tue, Feb 23 - Thu, Mar 11
United Airlines Logo
10:05 am - 9:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
20h 15m1 stop Houston George Bush Intcntl
United Airlines Logo
11:55 pm - 2:17 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
17h 22m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
$1,259United Airlines
Mon, Feb 22 - Wed, Mar 10
United Airlines Logo
10:05 am - 9:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
20h 15m1 stop Houston George Bush Intcntl
United Airlines Logo
10:05 pm - 9:47 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 42m1 stop Houston George Bush Intcntl
$1,259United Airlines
Mon, Feb 22 - Wed, Mar 10
American Airlines Logo
8:47 am - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
20h 43m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 pm - 10:52 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 22m1 stop Dallas/Fort Worth
$1,268American Airlines
Sun, Jan 31 - Tue, Feb 9
American Airlines Logo
5:50 am - 9:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 10m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 pm - 6:26 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
22h 56m1 stop Dallas/Fort Worth
$1,308American Airlines
Thu, Dec 3 - Sun, Dec 13
American Airlines Logo
12:56 pm - 10:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
18h 04m2 stops Dallas/Fort Worth Miami
American Airlines Logo
10:50 pm - 1:55 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 05m2 stops Miami Dallas/Fort Worth
$1,312American Airlines
Tue, Dec 1 - Tue, Dec 8

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American Airlines flights from St. Louis to Buenos Aires

Our best American Airlines deals on St. Louis to Buenos Aires flight tickets
American Airlines
Jan 31
STL8:47 amLambert-St Louis
20h 43m
1 stop
EZE8:30 amBuenos Aires Ministro Pistarini
Feb 9
EZE10:30 pmBuenos Aires Ministro Pistarini
15h 22m
1 stop
STL10:52 amLambert-St Louis
$1,268
American Airlines
Nov 28
STL9:11 amLambert-St Louis
19h 19m
2 stops
EZE7:30 amBuenos Aires Ministro Pistarini
Dec 10
EZE10:50 pmBuenos Aires Ministro Pistarini
18h 05m
2 stops
STL1:55 pmLambert-St Louis
$1,342

United Airlines flights from St. Louis to Buenos Aires

Our best United Airlines deals on St. Louis to Buenos Aires flight tickets
United Airlines
Feb 22
STL10:05 amLambert-St Louis
20h 15m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Mar 10
EZE11:55 pmBuenos Aires Ministro Pistarini
17h 22m
2 stops
STL2:17 pmLambert-St Louis
$1,259
United Airlines
Feb 21
STL7:04 pmLambert-St Louis
35h 16m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Mar 11
EZE11:55 pmBuenos Aires Ministro Pistarini
21h 11m
2 stops
STL6:06 pmLambert-St Louis
$1,291
United Airlines
Dec 3
STL10:50 amLambert-St Louis
17h 30m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 10
EZE11:55 pmBuenos Aires Ministro Pistarini
19h 29m
2 stops
STL4:24 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

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Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Fri 12/4

12:02 pm-9:50 am

2 stops42h 48m

Buenos Aires Ministro Pistarini

Fri 12/11

5:20 am-6:14 pm

1 stop15h 54m

$1,219

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

6:00 am-7:30 pm

1 stop34h 30m

Buenos Aires Ministro Pistarini

Wed 12/9

2:40 pm-11:17 am

2 stops47h 37m

$1,242

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 2/24

11:51 am-9:40 am

1 stop18h 49m

Buenos Aires Ministro Pistarini

Wed 3/10

7:20 am-11:39 pm

2 stops19h 19m

$1,258

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 2/23

9:00 am-9:40 am

1 stop21h 40m

Buenos Aires Ministro Pistarini

Tue 3/16

9:30 pm-10:48 am

1 stop15h 18m

$1,258
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 2/23

3:40 pm-7:35 am

1 stop12h 55m

Buenos Aires Ministro Pistarini

Thu 3/11

7:20 am-11:39 pm

2 stops19h 19m

$1,258

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/22

10:05 am-9:20 am

1 stop20h 15m

Buenos Aires Ministro Pistarini

Wed 3/10

11:55 pm-2:17 pm

2 stops17h 22m

$1,259

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/22

10:05 am-9:20 am

1 stop20h 15m

Buenos Aires Ministro Pistarini

Wed 3/10

10:05 pm-9:47 am

1 stop14h 42m

$1,259

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Sun 1/31

8:47 am-8:30 am

1 stop20h 43m

Buenos Aires Ministro Pistarini

Tue 2/9

10:30 pm-10:52 am

1 stop15h 22m

$1,268

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 12/3

5:50 am-9:00 am

1 stop24h 10m

Buenos Aires Ministro Pistarini

Sun 12/13

10:30 pm-6:26 pm

1 stop22h 56m

$1,308

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 12/1

12:56 pm-10:00 am

2 stops18h 04m

Buenos Aires Ministro Pistarini

Tue 12/8

10:50 pm-1:55 pm

2 stops18h 05m

$1,312

Flights are sorted by cheapest round-trip flights 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 $632, 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

$493

Fastest flight time

16h 15m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $493. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,219.
The fastest flight from St. Louis to Buenos Aires takes 16h 15m
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 15m 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
8,661 reviews
Search Delta flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.0
12,186 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