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Cheap flights from St. Louis to Buenos Aires from $376

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.
Delta Logo
12:00 pm - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
17h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
8:05 pm - 10:51 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
16h 46m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,219Delta
Wed, Sep 23 - Mon, Oct 5
Delta Logo
6:45 pm - 9:45 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 00m1 stop Atlanta Hartsfield-Jackson
Delta Logo
8:10 pm - 9:09 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 59m1 stop Atlanta Hartsfield-Jackson
$1,219Delta
Wed, Sep 23 - Mon, Oct 5
LATAM Airlines Logo
12:00 pm - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
17h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
5:35 pm - 10:55 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
19h 20m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,228LATAM Airlines
Wed, Sep 23 - Sun, Oct 4
Delta Logo
6:00 am - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
23h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
8:05 pm - 12:55 pmAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
18h 50m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,228Delta
Wed, Sep 23 - Sun, Oct 4
LATAM Airlines Logo
4:59 pm - 9:45 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 46m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
8:10 pm - 10:55 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
16h 45m1 stop Atlanta Hartsfield-Jackson
$1,258LATAM Airlines
Wed, Sep 23 - Sun, Oct 4
LATAM Airlines Logo
10:05 am - 9:45 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
21h 40m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
3:55 am - 11:42 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
21h 47m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,258LATAM Airlines
Wed, Sep 23 - Sat, Oct 3
United Airlines Logo
3:12 pm - 8:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 48m1 stop Houston George Bush Intcntl
United Airlines Logo
9:00 pm - 10:30 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
27h 30m1 stop Houston George Bush Intcntl
$1,318United Airlines
Thu, Oct 1 - Sun, Oct 11
United Airlines Logo
3:12 pm - 8:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
14h 48m1 stop Houston George Bush Intcntl
United Airlines Logo
9:00 pm - 12:13 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
41h 13m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
$1,331United Airlines
Thu, Oct 1 - Sun, Oct 11
American Airlines Logo
6:15 pm - 10:15 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 00m1 stop Miami
American Airlines Logo
10:10 am - 10:25 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 15m1 stop Miami
$1,332American Airlines
Thu, Dec 10 - Sat, Dec 19
American Airlines Logo
1:20 pm - 9:10 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
16h 50m2 stops Chicago O'Hare Intl Miami
American Airlines Logo
10:10 am - 10:25 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
15h 15m1 stop Miami
$1,336American 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
Oct 1
STL3:12 pmLambert-St Louis
14h 48m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 11
EZE9:00 pmBuenos Aires Ministro Pistarini
27h 30m
1 stop
STL10:30 pmLambert-St Louis
$1,318
United Airlines
Oct 1
STL3:12 pmLambert-St Louis
14h 48m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 11
EZE9:00 pmBuenos Aires Ministro Pistarini
41h 13m
2 stops
STL12:13 pmLambert-St Louis
$1,331
United Airlines
Sep 23
STL8:00 amLambert-St Louis
22h 00m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 4
EZE9:00 pmBuenos Aires Ministro Pistarini
24h 41m
2 stops
STL7:41 pmLambert-St Louis
$1,342

LATAM Airlines flights from St. Louis to Buenos Aires

Our best LATAM Airlines deals on St. Louis to Buenos Aires flight tickets
LATAM Airlines
Sep 23
STL4:59 pmLambert-St Louis
14h 46m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Oct 5
EZE3:35 pmBuenos Aires Ministro Pistarini
21h 16m
2 stops
STL10:51 amLambert-St Louis
$1,326
LATAM Airlines
Dec 10
STL12:36 pmLambert-St Louis
18h 14m
2 stops
EZE9:50 amBuenos Aires Ministro Pistarini
Dec 19
EZE12:50 pmBuenos Aires Ministro Pistarini
30h 38m
2 stops
STL4:28 pmLambert-St Louis
$1,377
LATAM Airlines
Dec 6
STL5:31 pmLambert-St Louis
28h 44m
2 stops
EZE1:15 amBuenos Aires Ministro Pistarini
Dec 10
EZE5:00 pmBuenos Aires Ministro Pistarini
18h 56m
2 stops
STL8:56 amLambert-St Louis
$1,451

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 - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 9/23

12:00 pm-7:40 am

2 stops17h 40m

Buenos Aires Jorge Newbery

Mon 10/5

8:05 pm-10:51 am

2 stops16h 46m

$1,219
Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 9/23

6:45 pm-9:45 am

1 stop13h 00m

Buenos Aires Ministro Pistarini

Mon 10/5

8:10 pm-9:09 am

1 stop14h 59m

$1,219

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 9/23

12:00 pm-7:40 am

2 stops17h 40m

Buenos Aires Jorge Newbery

Sun 10/4

5:35 pm-10:55 am

2 stops19h 20m

$1,228

St. LouisBuenos Aires

STL Lambert-St Louis - AEP Buenos Aires Jorge Newbery

STLAEP

Lambert-St Louis

Wed 9/23

6:00 am-7:40 am

2 stops23h 40m

Buenos Aires Jorge Newbery

Sun 10/4

8:05 pm-12:55 pm

2 stops18h 50m

$1,228

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 9/23

4:59 pm-9:45 am

1 stop14h 46m

Buenos Aires Ministro Pistarini

Sun 10/4

8:10 pm-10:55 am

1 stop16h 45m

$1,258

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 9/23

10:05 am-9:45 am

1 stop21h 40m

Buenos Aires Ministro Pistarini

Sat 10/3

3:55 am-11:42 pm

2 stops21h 47m

$1,258

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 10/1

3:12 pm-8:00 am

1 stop14h 48m

Buenos Aires Ministro Pistarini

Sun 10/11

9:00 pm-10:30 pm

1 stop27h 30m

$1,318

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 10/1

3:12 pm-8:00 am

1 stop14h 48m

Buenos Aires Ministro Pistarini

Sun 10/11

9:00 pm-12:13 pm

2 stops41h 13m

$1,331

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 12/10

6:15 pm-10:15 am

1 stop13h 00m

Buenos Aires Ministro Pistarini

Sat 12/19

10:10 am-10:25 pm

1 stop15h 15m

$1,332

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 12/10

1:20 pm-9:10 am

2 stops16h 50m

Buenos Aires Ministro Pistarini

Sat 12/19

10:10 am-10:25 pm

1 stop15h 15m

$1,336

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

$376

Fastest flight time

13h 00m

Direct flights

None
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $376. 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 13h 00m
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 00m 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
1,987 reviews
Search LATAM Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.8
8,553 reviews
Search Delta flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.1
12,047 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