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Cheap flights from St. Louis to Buenos Aires from $368

1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Buenos Aires

Cheap round-trip flights

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Multiple Airlines Logo
2:29 pm - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 11m2 stops Atlanta Hartsfield-Jackson Miami
Multiple Airlines Logo
1:10 pm - 1:10 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
26h 00m2 stops Miami Atlanta Hartsfield-Jackson
$1,035Multiple Airlines
Mon, Sep 14 - Sun, Sep 20
Multiple Airlines Logo
2:40 pm - 3:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
34h 20m3 stops Toronto Pearson Intl Cancun Punta Cana
Multiple Airlines Logo
6:00 am - 2:00 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
34h 00m3 stops Punta Cana Cancun Toronto Pearson Intl
$1,091Multiple Airlines
Mon, Sep 21 - Mon, Sep 28
Delta Logo
10:04 am - 6:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 16m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
7:20 am - 12:46 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
20h 26m2 stops Lima J Chavez Intl Salt Lake City
$1,148Delta
Wed, Dec 2 - Thu, Dec 17
Delta Logo
10:00 am - 6:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
7:20 am - 12:40 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
20h 20m2 stops Lima J Chavez Intl Salt Lake City
$1,148Delta
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
10:00 am - 6:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
11:35 pm - 4:32 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 57m1 stop Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
5:37 pm - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 03m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
11:35 pm - 11:15 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 40m1 stop Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
American Airlines Logo
2:54 pm - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 36m1 stop Dallas/Fort Worth
American Airlines Logo
10:50 pm - 5:49 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
21h 59m1 stop Miami
$1,148American Airlines
Wed, Dec 2 - Thu, Dec 17
American Airlines Logo
6:09 pm - 10:15 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 06m1 stop Miami
American Airlines Logo
10:10 am - 10:05 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 55m1 stop Miami
$1,148American Airlines
Thu, Feb 4 - Sun, Feb 14
American Airlines Logo
1:06 pm - 10:15 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
18h 09m2 stops Chicago O'Hare Intl Miami
American Airlines Logo
10:10 am - 11:58 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
16h 48m2 stops Miami Chicago O'Hare Intl
$1,152American Airlines
Thu, Feb 4 - Sun, Feb 14
United Airlines Logo
11:15 am - 8:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
18h 45m1 stop Houston George Bush Intcntl
United Airlines Logo
9:00 pm - 10:10 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 10m1 stop Houston George Bush Intcntl
$1,169United Airlines
Tue, Sep 22 - Mon, Oct 5

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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 4
STL11:51 amLambert-St Louis
27h 39m
2 stops
AEP6:30 pmBuenos Aires Jorge Newbery
Feb 14
AEP5:35 pmBuenos Aires Jorge Newbery
41h 37m
2 stops
STL8:12 amLambert-St Louis
$1,179
LATAM Airlines
Oct 8
STL10:14 amLambert-St Louis
21h 26m
2 stops
EZE9:40 amBuenos Aires Ministro Pistarini
Oct 15
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 15m
1 stop
STL9:25 amLambert-St Louis
$1,182
LATAM Airlines
Dec 6
STL2:33 pmLambert-St Louis
22h 27m
2 stops
AEP4:00 pmBuenos Aires Jorge Newbery
Dec 21
AEP5:35 pmBuenos Aires Jorge Newbery
18h 32m
2 stops
STL9:07 amLambert-St Louis
$1,188

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 14
STL6:15 amLambert-St Louis
22h 05m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 21
EZE11:55 pmBuenos Aires Ministro Pistarini
19h 55m
1 stop
STL4:50 pmLambert-St Louis
$1,228
United Airlines
Oct 9
STL3:12 pmLambert-St Louis
14h 48m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 16
EZE9:00 pmBuenos Aires Ministro Pistarini
19h 10m
1 stop
STL2:10 pmLambert-St Louis
$1,233
United Airlines
Oct 9
STL6:15 amLambert-St Louis
23h 45m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 16
EZE9:00 pmBuenos Aires Ministro Pistarini
22h 41m
2 stops
STL5:41 pmLambert-St Louis
$1,237

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 9/14

2:29 pm-9:40 am

2 stops17h 11m

Buenos Aires Ministro Pistarini

Sun 9/20

1:10 pm-1:10 pm

2 stops26h 00m

$1,035

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 9/21

2:40 pm-3:00 am

3 stops34h 20m

Buenos Aires Ministro Pistarini

Mon 9/28

6:00 am-2:00 pm

3 stops34h 00m

$1,091

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:04 am-6:20 am

2 stops17h 16m

Buenos Aires Ministro Pistarini

Thu 12/17

7:20 am-12:46 am

2 stops20h 26m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:00 am-6:20 am

2 stops17h 20m

Buenos Aires Ministro Pistarini

Thu 12/17

7:20 am-12:40 am

2 stops20h 20m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:00 am-6:20 am

2 stops17h 20m

Buenos Aires Ministro Pistarini

Thu 12/17

11:35 pm-4:32 pm

1 stop19h 57m

$1,148
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

5:37 pm-9:40 am

1 stop13h 03m

Buenos Aires Ministro Pistarini

Thu 12/17

11:35 pm-11:15 am

1 stop14h 40m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

2:54 pm-8:30 am

1 stop14h 36m

Buenos Aires Ministro Pistarini

Thu 12/17

10:50 pm-5:49 pm

1 stop21h 59m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 2/4

6:09 pm-10:15 am

1 stop13h 06m

Buenos Aires Ministro Pistarini

Sun 2/14

10:10 am-10:05 pm

1 stop14h 55m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 2/4

1:06 pm-10:15 am

2 stops18h 09m

Buenos Aires Ministro Pistarini

Sun 2/14

10:10 am-11:58 pm

2 stops16h 48m

$1,152

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 9/22

11:15 am-8:00 am

1 stop18h 45m

Buenos Aires Ministro Pistarini

Mon 10/5

9:00 pm-10:10 am

1 stop15h 10m

$1,169

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 September. 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 September, then book flights to Buenos Aires from St. Louis during November instead. Flights to Buenos Aires in November, while not as cheap as those in September, still average around $1,065.

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

$368

Fastest flight time

14h 46m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $368. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,035.
The fastest flight from St. Louis to Buenos Aires takes 14h 46m
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 46m 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
1,990 reviews
Search LATAM Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.8
8,529 reviews
Search Delta flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.1
11,995 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