Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Buenos Aires from $479

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.
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
11:00 am - 1:16 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
29h 16m1 stop Punta Cana
$1,192Multiple Airlines
Fri, Dec 4 - Thu, Dec 17
LATAM Airlines Logo
9:52 am - 10:55 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
22h 03m2 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
$1,204LATAM Airlines
Wed, Dec 30 - Mon, Jan 18
LATAM Airlines Logo
12:37 pm - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
15h 58m1 stop Atlanta Hartsfield-Jackson
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
$1,204LATAM Airlines
Wed, Dec 30 - Mon, Jan 18
Multiple Airlines Logo
12:05 pm - 9:32 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
18h 27m1 stop Punta Cana
Multiple Airlines Logo
2:40 pm - 11:17 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
47h 37m2 stops Miami Atlanta Hartsfield-Jackson
$1,205Multiple Airlines
Mon, Nov 30 - Mon, Dec 14
Delta Logo
2:33 pm - 9:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
16h 07m2 stops Atlanta Hartsfield-Jackson Sao Paulo Guarulhos Intl
Delta Logo
5:35 pm - 9:01 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
18h 26m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,218Delta
Wed, Dec 2 - Mon, Dec 14
Delta Logo
2:33 pm - 2:00 pmSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
20h 27m2 stops Atlanta Hartsfield-Jackson Sao Paulo Guarulhos Intl
Delta Logo
3:50 pm - 9:01 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 11m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson
$1,218Delta
Thu, Dec 3 - Tue, Dec 15
American Airlines Logo
10:25 am - 9:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
19h 35m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 pm - 12:23 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
16h 53m1 stop Dallas/Fort Worth
$1,218American Airlines
Wed, Dec 2 - Mon, Dec 14
United Airlines Logo
10:52 am - 9:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
19h 28m1 stop Houston George Bush Intcntl
United Airlines Logo
11:55 pm - 2:06 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
17h 11m1 stop Houston George Bush Intcntl
$1,218United Airlines
Wed, Dec 30 - Mon, Jan 18
LATAM Airlines Logo
2:33 pm - 9:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
16h 07m2 stops Atlanta Hartsfield-Jackson Sao Paulo Guarulhos Intl
LATAM Airlines Logo
3:50 pm - 9:01 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 11m2 stops Santiago Arturo Merino Benitez Atlanta Hartsfield-Jackson
$1,218LATAM Airlines
Wed, Dec 2 - Wed, Dec 16
American Airlines Logo
12:56 pm - 9:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 04m1 stop Dallas/Fort Worth
American Airlines Logo
9:20 pm - 10:05 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 45m1 stop Miami
$1,283American Airlines
Sun, Nov 29 - Wed, Dec 9

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 30
STL12:37 pmLambert-St Louis
15h 58m
1 stop
EZE7:35 amBuenos Aires Ministro Pistarini
Jan 18
EZE8:05 pmBuenos Aires Ministro Pistarini
30h 34m
2 stops
STL11:39 pmLambert-St Louis
$1,204
LATAM Airlines
Mar 28
STL3:40 pmLambert-St Louis
16h 05m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Apr 10
EZE7:20 amBuenos Aires Ministro Pistarini
18h 19m
2 stops
STL11:39 pmLambert-St Louis
$1,298
LATAM Airlines
Mar 3
STL9:00 amLambert-St Louis
19h 35m
1 stop
EZE7:35 amBuenos Aires Ministro Pistarini
Mar 8
EZE11:35 pmBuenos Aires Ministro Pistarini
21h 26m
1 stop
STL6:01 pmLambert-St Louis
$1,328

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 30
STL2:55 pmLambert-St Louis
13h 25m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 14
EZE10:05 pmBuenos Aires Ministro Pistarini
14h 40m
1 stop
STL9:45 amLambert-St Louis
$1,283
United Airlines
Nov 29
STL5:55 pmLambert-St Louis
34h 25m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 16
EZE10:05 pmBuenos Aires Ministro Pistarini
14h 44m
1 stop
STL9:49 amLambert-St Louis
$1,294
United Airlines
Nov 29
STL1:08 pmLambert-St Louis
17h 12m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 9
EZE10:05 pmBuenos Aires Ministro Pistarini
21h 19m
2 stops
STL4:24 pmLambert-St Louis
$1,317

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

Fri 12/4

12:02 pm-9:50 am

2 stops42h 48m

Buenos Aires Ministro Pistarini

Thu 12/17

11:00 am-1:16 pm

1 stop29h 16m

$1,192

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/30

9:52 am-10:55 am

2 stops22h 03m

Buenos Aires Ministro Pistarini

Mon 1/18

8:05 pm-11:39 pm

2 stops30h 34m

$1,204

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/30

12:37 pm-7:35 am

1 stop15h 58m

Buenos Aires Ministro Pistarini

Mon 1/18

8:05 pm-11:39 pm

2 stops30h 34m

$1,204

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 11/30

12:05 pm-9:32 am

1 stop18h 27m

Buenos Aires Ministro Pistarini

Mon 12/14

2:40 pm-11:17 am

2 stops47h 37m

$1,205

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 12/2

2:33 pm-9:40 am

2 stops16h 07m

Buenos Aires Jorge Newbery

Mon 12/14

5:35 pm-9:01 am

2 stops18h 26m

$1,218

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Thu 12/3

2:33 pm-2:00 pm

2 stops20h 27m

Buenos Aires Jorge Newbery

Tue 12/15

3:50 pm-9:01 am

2 stops20h 11m

$1,218

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/2

10:25 am-9:00 am

1 stop19h 35m

Buenos Aires Ministro Pistarini

Mon 12/14

10:30 pm-12:23 pm

1 stop16h 53m

$1,218

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/30

10:52 am-9:20 am

1 stop19h 28m

Buenos Aires Ministro Pistarini

Mon 1/18

11:55 pm-2:06 pm

1 stop17h 11m

$1,218

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 12/2

2:33 pm-9:40 am

2 stops16h 07m

Buenos Aires Jorge Newbery

Wed 12/16

3:50 pm-9:01 am

2 stops20h 11m

$1,218
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Sun 11/29

12:56 pm-9:00 am

1 stop17h 04m

Buenos Aires Ministro Pistarini

Wed 12/9

9:20 pm-10:05 am

1 stop15h 45m

$1,283

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Buenos Aires from

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

$479

Fastest flight time

12h 40m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $479. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,192.
The fastest flight from St. Louis to Buenos Aires takes 12h 40m
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 12h 40m 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
8,650 reviews
Search Delta flights
LATAM AirlinesPriceFrom $884Free CancellationRating
7.4
1,972 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.0
12,165 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.

An easier way to manage your Buenos Aires trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 11/13
Fri 11/20
By creating a price alert you accept our terms of use and privacy policy.

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