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Cheap flights from Buenos Aires to St. Louis from $510

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 7/22. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Buenos Aires to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
8:10 pm - 9:46 am
EZE
-
STL
15h 36m
1 stop
LATAM Airlines Logo
6:58 pm - 9:45 am
STL
-
EZE
12h 47m
1 stop
$1,096LATAM Airlines
Mon, Jun 29 - Tue, Jul 14
LATAM Airlines Logo
3:55 am - 11:56 pm
EZE
-
STL
22h 01m
2 stops
LATAM Airlines Logo
6:58 pm - 9:45 am
STL
-
EZE
12h 47m
1 stop
$1,279LATAM Airlines
Sun, Jun 28 - Tue, Jul 14
United Airlines Logo
9:00 pm - 6:16 pm
EZE
-
STL
23h 16m
2 stops
United Airlines Logo
1:29 pm - 8:00 am
STL
-
EZE
16h 31m
2 stops
$1,434United Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
9:00 pm - 7:41 pm
EZE
-
STL
24h 41m
2 stops
United Airlines Logo
10:27 am - 8:00 am
STL
-
EZE
19h 33m
2 stops
$1,436United Airlines
Thu, Sep 24 - Mon, Sep 28
American Airlines Logo
10:00 pm - 12:44 pm
EZE
-
STL
16h 44m
1 stop
American Airlines Logo
6:29 pm - 8:15 pm
STL
-
EZE
23h 46m
1 stop
$1,492American Airlines
Sun, Jul 12 - Sat, Jul 18
American Airlines Logo
8:30 pm - 1:55 pm
EZE
-
STL
19h 25m
2 stops
American Airlines Logo
6:29 pm - 8:15 pm
STL
-
EZE
23h 46m
1 stop
$1,497American Airlines
Sun, Jul 12 - Sat, Jul 18
LATAM Airlines Logo
3:55 am - 11:56 pm
EZE
-
STL
22h 01m
2 stops
LATAM Airlines Logo
10:51 am - 6:10 am
STL
-
EZE
17h 19m
2 stops
$1,556LATAM Airlines
Sun, Jun 28 - Tue, Jul 14
American Airlines Logo
8:30 pm - 2:50 pm
EZE
-
STL
20h 20m
2 stops
American Airlines Logo
8:38 am - 7:00 am
STL
-
EZE
20h 22m
2 stops
$1,571American Airlines
Sun, Jul 12 - Sat, Jul 18
Air Canada Logo
4:35 pm - 6:41 pm
EZE
-
STL
28h 06m
2 stops
Air Canada Logo
12:10 pm - 2:30 pm
STL
-
EZE
48h 20m
3 stops
$1,581Air Canada
Thu, Sep 24 - Mon, Sep 28
Air Canada Logo
4:35 pm - 6:41 pm
EZE
-
STL
28h 06m
2 stops
Air Canada Logo
12:10 pm - 2:30 pm
STL
-
EZE
48h 20m
3 stops
$1,584Air Canada
Thu, Sep 24 - Mon, Sep 28

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LATAM Airlines flights from Buenos Aires to St. Louis

Our best LATAM Airlines deals on Buenos Aires to St. Louis flight tickets
LATAM Airlines
Jun 29
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 36m
1 stop
STL9:46 amLambert-St Louis
Jul 14
STL6:58 pmLambert-St Louis
12h 47m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,096
LATAM Airlines
Jun 28
EZE3:55 amBuenos Aires Ministro Pistarini
22h 01m
2 stops
STL11:56 pmLambert-St Louis
Jul 14
STL6:58 pmLambert-St Louis
12h 47m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,279
LATAM Airlines
Jun 28
EZE3:55 amBuenos Aires Ministro Pistarini
22h 01m
2 stops
STL11:56 pmLambert-St Louis
Jul 14
STL10:51 amLambert-St Louis
17h 19m
2 stops
EZE6:10 amBuenos Aires Ministro Pistarini
$1,556

American Airlines flights from Buenos Aires to St. Louis

Our best American Airlines deals on Buenos Aires to St. Louis flight tickets
American Airlines
Jun 21
EZE10:05 pmBuenos Aires Ministro Pistarini
22h 25m
1 stop
STL6:30 pmLambert-St Louis
Aug 5
STL11:35 amLambert-St Louis
19h 10m
1 stop
EZE8:45 amBuenos Aires Ministro Pistarini
$1,238
American Airlines
Jun 21
EZE9:05 pmBuenos Aires Ministro Pistarini
18h 57m
2 stops
STL2:02 pmLambert-St Louis
Aug 5
STL8:34 amLambert-St Louis
19h 26m
2 stops
EZE6:00 amBuenos Aires Ministro Pistarini
$1,242
American Airlines
Jul 12
EZE10:00 pmBuenos Aires Ministro Pistarini
16h 44m
1 stop
STL12:44 pmLambert-St Louis
Jul 18
STL6:29 pmLambert-St Louis
23h 46m
1 stop
EZE8:15 pmBuenos Aires Ministro Pistarini
$1,492

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 June 19, 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
Quickest round-trip

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 6/29

8:10 pm-9:46 am

1 stop15h 36m

Lambert-St Louis

Tue 7/14

6:58 pm-9:45 am

1 stop12h 47m

$1,096

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 6/28

3:55 am-11:56 pm

2 stops22h 01m

Lambert-St Louis

Tue 7/14

6:58 pm-9:45 am

1 stop12h 47m

$1,279

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/24

9:00 pm-6:16 pm

2 stops23h 16m

Lambert-St Louis

Mon 9/28

1:29 pm-8:00 am

2 stops16h 31m

$1,434

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/24

9:00 pm-7:41 pm

2 stops24h 41m

Lambert-St Louis

Mon 9/28

10:27 am-8:00 am

2 stops19h 33m

$1,436

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 7/12

10:00 pm-12:44 pm

1 stop16h 44m

Lambert-St Louis

Sat 7/18

6:29 pm-8:15 pm

1 stop23h 46m

$1,492

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 7/12

8:30 pm-1:55 pm

2 stops19h 25m

Lambert-St Louis

Sat 7/18

6:29 pm-8:15 pm

1 stop23h 46m

$1,497

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 6/28

3:55 am-11:56 pm

2 stops22h 01m

Lambert-St Louis

Tue 7/14

10:51 am-6:10 am

2 stops17h 19m

$1,556

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 7/12

8:30 pm-2:50 pm

2 stops20h 20m

Lambert-St Louis

Sat 7/18

8:38 am-7:00 am

2 stops20h 22m

$1,571

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/24

4:35 pm-6:41 pm

2 stops28h 06m

Lambert-St Louis

Mon 9/28

12:10 pm-2:30 pm

3 stops48h 20m

$1,581

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/24

4:35 pm-6:41 pm

2 stops28h 06m

Lambert-St Louis

Mon 9/28

12:10 pm-2:30 pm

3 stops48h 20m

$1,584

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 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 7% 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

15h 10m

Direct flights

None
The fastest flight from Buenos Aires to St. Louis takes 15h 10m
There are no direct flights from Buenos Aires to St. Louis. There are no popular flight routes from Buenos Aires to St. Louis.
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Frequently asked questions about flying from Buenos Aires to St. Louis

  • 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 15h 10m, 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.

Traveling to a place near St. Louis?

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

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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