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Cheap flights from Buenos Aires to St. Louis from $708

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buenos Aires to St. Louis departing on 5/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Buenos Aires to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:30 pm - 10:16 am
EZE
-
STL
15h 46m
1 stop
American Airlines Logo
8:36 am - 7:05 am
STL
-
EZE
20h 29m
1 stop
$1,252American Airlines
Mon, Apr 6 - Wed, Jun 10
American Airlines Logo
10:20 pm - 4:00 pm
EZE
-
STL
19h 40m
2 stops
American Airlines Logo
1:45 pm - 7:05 am
STL
-
EZE
15h 20m
2 stops
$1,256American Airlines
Mon, Apr 6 - Wed, Jun 10
American Airlines Logo
8:40 pm - 10:16 am
EZE
-
STL
15h 36m
1 stop
American Airlines Logo
11:15 am - 7:05 am
STL
-
EZE
17h 50m
1 stop
$1,302American Airlines
Tue, Apr 7 - Thu, Jun 11
American Airlines Logo
10:20 pm - 4:00 pm
EZE
-
STL
19h 40m
2 stops
American Airlines Logo
1:45 pm - 8:35 am
STL
-
EZE
16h 50m
2 stops
$1,306American Airlines
Mon, Apr 6 - Sat, Jun 13
American Airlines Logo
8:30 pm - 10:16 am
EZE
-
STL
15h 46m
1 stop
American Airlines Logo
6:24 pm - 8:15 pm
STL
-
EZE
23h 51m
1 stop
$1,315American Airlines
Mon, Apr 6 - Sat, Jun 13
United Airlines Logo
9:00 pm - 10:09 am
EZE
-
STL
15h 09m
1 stop
United Airlines Logo
7:30 am - 8:00 am
STL
-
EZE
22h 30m
2 stops
$1,549United Airlines
Fri, Aug 28 - Tue, Sep 1
LATAM Airlines Logo
7:35 am - 11:37 pm
EZE
-
STL
18h 02m
2 stops
LATAM Airlines Logo
1:30 pm - 9:45 am
STL
-
EZE
18h 15m
1 stop
$1,559LATAM Airlines
Fri, Aug 28 - Tue, Sep 1
LATAM Airlines Logo
8:10 pm - 9:36 am
EZE
-
STL
15h 26m
1 stop
LATAM Airlines Logo
1:30 pm - 9:45 am
STL
-
EZE
18h 15m
1 stop
$1,560LATAM Airlines
Fri, Aug 28 - Tue, Sep 1
LATAM Airlines Logo
8:10 pm - 11:09 am
EZE
-
STL
16h 59m
1 stop
LATAM Airlines Logo
1:30 pm - 9:45 am
STL
-
EZE
18h 15m
1 stop
$1,762LATAM Airlines
Tue, Apr 7 - Thu, Jun 11
LATAM Airlines Logo
8:10 pm - 11:09 am
EZE
-
STL
16h 59m
1 stop
LATAM Airlines Logo
11:51 am - 6:10 am
STL
-
EZE
16h 19m
2 stops
$1,776LATAM Airlines
Tue, Apr 7 - Thu, Jun 11

Delta flights from Buenos Aires to St. Louis

Our best Delta deals on Buenos Aires to St. Louis flight tickets
Delta
Mar 25
EZE10:25 pmBuenos Aires Ministro Pistarini
24h 17m
2 stops
STL8:42 pmLambert-St Louis
May 14
STL9:15 amLambert-St Louis
22h 05m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
$1,463
Delta
Mar 25
EZE11:00 amBuenos Aires Ministro Pistarini
26h 09m
2 stops
STL11:09 amLambert-St Louis
May 17
STL6:00 amLambert-St Louis
22h 10m
2 stops
EZE6:10 amBuenos Aires Ministro Pistarini
$1,501
Delta
Mar 25
EZE8:55 pmBuenos Aires Ministro Pistarini
22h 58m
1 stop
STL5:53 pmLambert-St Louis
May 17
STL10:49 amLambert-St Louis
20h 56m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,575

LATAM Airlines flights from Buenos Aires to St. Louis

Our best LATAM Airlines deals on Buenos Aires to St. Louis flight tickets
LATAM Airlines
Apr 1
EZE12:15 pmBuenos Aires Ministro Pistarini
22h 50m
2 stops
STL9:05 amLambert-St Louis
Jun 10
STL1:30 pmLambert-St Louis
29h 30m
2 stops
EZE9:00 pmBuenos Aires Ministro Pistarini
$1,547
LATAM Airlines
Aug 28
EZE7:35 amBuenos Aires Ministro Pistarini
18h 02m
2 stops
STL11:37 pmLambert-St Louis
Sep 1
STL1:30 pmLambert-St Louis
18h 15m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,559
LATAM Airlines
Aug 28
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 26m
1 stop
STL9:36 amLambert-St Louis
Sep 1
STL1:30 pmLambert-St Louis
18h 15m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,560

momondo Fare Finder

 
Customize your flight search to find flights from Buenos Aires to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Buenos Aires to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

8:30 pm-10:16 am

1 stop15h 46m

Lambert-St Louis

Wed 6/10

8:36 am-7:05 am

1 stop20h 29m

$1,252

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

10:20 pm-4:00 pm

2 stops19h 40m

Lambert-St Louis

Wed 6/10

1:45 pm-7:05 am

2 stops15h 20m

$1,256

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

8:40 pm-10:16 am

1 stop15h 36m

Lambert-St Louis

Thu 6/11

11:15 am-7:05 am

1 stop17h 50m

$1,302

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

10:20 pm-4:00 pm

2 stops19h 40m

Lambert-St Louis

Sat 6/13

1:45 pm-8:35 am

2 stops16h 50m

$1,306

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

8:30 pm-10:16 am

1 stop15h 46m

Lambert-St Louis

Sat 6/13

6:24 pm-8:15 pm

1 stop23h 51m

$1,315

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Fri 8/28

9:00 pm-10:09 am

1 stop15h 09m

Lambert-St Louis

Tue 9/1

7:30 am-8:00 am

2 stops22h 30m

$1,549

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Fri 8/28

7:35 am-11:37 pm

2 stops18h 02m

Lambert-St Louis

Tue 9/1

1:30 pm-9:45 am

1 stop18h 15m

$1,559

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Fri 8/28

8:10 pm-9:36 am

1 stop15h 26m

Lambert-St Louis

Tue 9/1

1:30 pm-9:45 am

1 stop18h 15m

$1,560

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

8:10 pm-11:09 am

1 stop16h 59m

Lambert-St Louis

Thu 6/11

1:30 pm-9:45 am

1 stop18h 15m

$1,762
Quickest round-trip

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

8:10 pm-11:09 am

1 stop16h 59m

Lambert-St Louis

Thu 6/11

11:51 am-6:10 am

2 stops16h 19m

$1,776

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Buenos Aires to St. Louis

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

Can stopping save me money on Buenos Aires to St. Louis flights?

You could potentially save up to 21% on your flight if you consider stops on a Buenos Aires to St. Louis flight.

When to book flights from Buenos Aires to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Buenos Aires to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Buenos Aires to St. Louis (BUE to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buenos Aires to St. Louis

Fastest flight time

14h 25m

Direct flights

None
The fastest flight from Buenos Aires to St. Louis takes 14h 25m
There are no direct flights from Buenos Aires to St. Louis. There are no popular flight routes from Buenos Aires to St. Louis.
Search flight deals

  • How far is Buenos Aires to Lambert-St Louis by plane?

    Buenos Aires and Lambert-St Louis are 5450.9 mi apart from one another. Flights usually cover this in 14h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Buenos Aires to Lambert-St Louis Airport?

    Prices for flights from Buenos Aires to Lambert-St Louis Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Buenos Aires to Lambert-St Louis Airport?

    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 Buenos Aires to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Buenos Aires to St. Louis?

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Edwardsville
Eureka
Litchfield
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Buenos Aires to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Buenos Aires to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Buenos Aires to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Buenos Aires which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Buenos Aires to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Buenos Aires to St. Louis.

I’m not ready to book a flight from Buenos Aires to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Buenos Aires to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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