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Cheap flights from St. Louis to Buenos Aires from $446

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
6:35 pm - 9:50 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
36h 15m2 stops Atlanta Hartsfield-Jackson Miami
Multiple Airlines Logo
8:40 am - 6:14 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
36h 34m1 stop Punta Cana
$1,104Multiple Airlines
Mon, Nov 23 - Tue, Dec 8
LATAM Airlines Logo
5:30 pm - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 10m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
9:30 pm - 11:29 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
16h 59m1 stop Atlanta Hartsfield-Jackson
$1,133LATAM Airlines
Mon, Nov 23 - Tue, Dec 8
Delta Logo
10:00 am - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
18h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:35 pm - 8:55 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
18h 20m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148Delta
Tue, Nov 10 - Thu, Nov 19
Delta Logo
6:00 am - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
22h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:35 pm - 8:55 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
18h 20m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148Delta
Mon, Nov 9 - Wed, Nov 18
American Airlines Logo
6:00 am - 9:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 00m1 stop Dallas/Fort Worth
American Airlines Logo
10:10 am - 9:47 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 37m1 stop Miami
$1,148American Airlines
Mon, Nov 23 - Tue, Dec 8
LATAM Airlines Logo
2:31 pm - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 04m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
11:35 pm - 4:23 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 48m1 stop Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Nov 11 - Thu, Nov 19
LATAM Airlines Logo
2:31 pm - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 04m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
5:00 pm - 11:15 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
21h 15m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Nov 11 - Thu, Nov 19
United Airlines Logo
6:15 am - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
22h 05m1 stop Houston George Bush Intcntl
United Airlines Logo
11:55 pm - 4:46 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 51m1 stop Houston George Bush Intcntl
$1,158United Airlines
Thu, Nov 12 - Thu, Nov 19
United Airlines Logo
3:03 pm - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 17m1 stop Houston George Bush Intcntl
United Airlines Logo
10:05 pm - 9:42 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 37m1 stop Houston George Bush Intcntl
$1,158United Airlines
Tue, Jan 12 - Thu, Feb 11
American Airlines Logo
5:00 am - 7:25 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
23h 25m1 stop Miami
American Airlines Logo
11:35 pm - 11:33 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 58m1 stop Miami
$1,288American Airlines
Thu, Dec 10 - Sat, Dec 19

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United Airlines flights from St. Louis to Buenos Aires

Our best United Airlines deals on St. Louis to Buenos Aires flight tickets
United Airlines
Nov 12
STL6:15 amLambert-St Louis
22h 05m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 19
EZE11:55 pmBuenos Aires Ministro Pistarini
19h 51m
1 stop
STL4:46 pmLambert-St Louis
$1,158
United Airlines
Nov 12
STL6:15 amLambert-St Louis
22h 05m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 19
EZE10:05 pmBuenos Aires Ministro Pistarini
21h 54m
2 stops
STL4:59 pmLambert-St Louis
$1,162
United Airlines
Jan 16
STL3:03 pmLambert-St Louis
13h 17m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Jan 25
EZE10:05 pmBuenos Aires Ministro Pistarini
21h 38m
1 stop
STL4:43 pmLambert-St Louis
$1,188

American Airlines flights from St. Louis to Buenos Aires

Our best American Airlines deals on St. Louis to Buenos Aires flight tickets
American Airlines
Sep 17
STL2:11 pmLambert-St Louis
15h 04m
1 stop
EZE7:15 amBuenos Aires Ministro Pistarini
Sep 30
EZE8:45 pmBuenos Aires Ministro Pistarini
18h 36m
1 stop
STL1:21 pmLambert-St Louis
$1,248
American Airlines
Sep 17
STL2:11 pmLambert-St Louis
15h 04m
1 stop
EZE7:15 amBuenos Aires Ministro Pistarini
Sep 30
EZE8:45 pmBuenos Aires Ministro Pistarini
17h 30m
2 stops
STL12:15 pmLambert-St Louis
$1,252
American Airlines
Dec 10
STL10:38 amLambert-St Louis
19h 32m
1 stop
EZE9:10 amBuenos Aires Ministro Pistarini
Dec 19
EZE11:35 pmBuenos Aires Ministro Pistarini
14h 58m
1 stop
STL11:33 amLambert-St Louis
$1,288

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 11/23

6:35 pm-9:50 am

2 stops36h 15m

Buenos Aires Ministro Pistarini

Tue 12/8

8:40 am-6:14 pm

1 stop36h 34m

$1,104

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 11/23

5:30 pm-9:40 am

1 stop13h 10m

Buenos Aires Ministro Pistarini

Tue 12/8

9:30 pm-11:29 am

1 stop16h 59m

$1,133

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Tue 11/10

10:00 am-7:40 am

2 stops18h 40m

Buenos Aires Jorge Newbery

Thu 11/19

5:35 pm-8:55 am

2 stops18h 20m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Mon 11/9

6:00 am-7:40 am

2 stops22h 40m

Buenos Aires Jorge Newbery

Wed 11/18

5:35 pm-8:55 am

2 stops18h 20m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 11/23

6:00 am-9:00 am

1 stop24h 00m

Buenos Aires Ministro Pistarini

Tue 12/8

10:10 am-9:47 pm

1 stop14h 37m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 11/11

2:31 pm-7:35 am

1 stop14h 04m

Buenos Aires Ministro Pistarini

Thu 11/19

11:35 pm-4:23 pm

1 stop19h 48m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 11/11

2:31 pm-7:35 am

1 stop14h 04m

Buenos Aires Ministro Pistarini

Thu 11/19

5:00 pm-11:15 am

2 stops21h 15m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 11/12

6:15 am-7:20 am

1 stop22h 05m

Buenos Aires Ministro Pistarini

Thu 11/19

11:55 pm-4:46 pm

1 stop19h 51m

$1,158
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 1/12

3:03 pm-7:20 am

1 stop13h 17m

Buenos Aires Ministro Pistarini

Thu 2/11

10:05 pm-9:42 am

1 stop14h 37m

$1,158

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 12/10

5:00 am-7:25 am

1 stop23h 25m

Buenos Aires Ministro Pistarini

Sat 12/19

11:35 pm-11:33 am

1 stop14h 58m

$1,288

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 4% 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

$446

Fastest flight time

13h 17m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $446. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,104.
The fastest flight from St. Louis to Buenos Aires takes 13h 17m
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 13h 17m 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
1,985 reviews
Search LATAM Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.8
8,578 reviews
Search Delta flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.1
12,076 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