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Cheap flights from Buenos Aires to St. Louis from $524

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 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Delta Logo
8:10 pm - 9:46 am
EZE
-
STL
15h 36m
1 stop
Delta Logo
10:51 am - 6:10 am
STL
-
EZE
17h 19m
2 stops
$1,228Delta
Tue, Jun 30 - Thu, Jul 16
Multiple Airlines Logo
1:10 pm - 8:52 am
EZE
-
STL
45h 42m
2 stops
Multiple Airlines Logo
6:30 am - 10:25 pm
STL
-
EZE
37h 55m
2 stops
$1,296Multiple Airlines
Sat, Jun 20 - Sat, Jun 27
LATAM Airlines Logo
8:10 pm - 9:46 am
EZE
-
STL
15h 36m
1 stop
LATAM Airlines Logo
10:51 am - 9:45 am
STL
-
EZE
20h 54m
1 stop
$1,324LATAM Airlines
Thu, Jun 11 - Thu, Jun 18
Air Canada Logo
4:35 pm - 8:09 pm
EZE
-
STL
29h 34m
1 stop
Air Canada Logo
2:15 pm - 2:30 pm
STL
-
EZE
22h 15m
1 stop
$1,337Air Canada
Mon, May 25 - Sun, Jun 7
Multiple Airlines Logo
8:25 am - 2:39 pm
EZE
-
STL
32h 14m
1 stop
Multiple Airlines Logo
6:33 pm - 4:30 am
STL
-
EZE
55h 57m
2 stops
$1,350Multiple Airlines
Mon, May 25 - Sun, Jun 7
Delta Logo
1:10 pm - 9:46 am
EZE
-
STL
22h 36m
2 stops
Delta Logo
1:22 pm - 9:40 am
STL
-
EZE
18h 18m
2 stops
$1,351Delta
Tue, Jun 30 - Thu, Jul 16
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
53h 50m
3 stops
Air Canada Logo
2:15 pm - 2:30 pm
STL
-
EZE
22h 15m
2 stops
$1,364Air Canada
Mon, May 25 - Sun, Jun 7
Delta Logo
10:40 pm - 3:50 pm
EZE
-
STL
19h 10m
2 stops
Delta Logo
1:20 pm - 9:45 am
STL
-
EZE
18h 25m
1 stop
$1,377Delta
Sat, Jun 20 - Sat, Jun 27
Multiple Airlines Logo
7:10 am - 12:21 pm
EZE
-
STL
31h 11m
3 stops
Multiple Airlines Logo
2:15 pm - 1:20 am
STL
-
EZE
33h 05m
3 stops
$1,383Multiple Airlines
Sat, Jun 20 - Sat, Jun 27
Air Canada Logo
4:35 pm - 6:42 pm
EZE
-
STL
52h 07m
3 stops
Air Canada Logo
12:10 pm - 2:30 pm
STL
-
EZE
24h 20m
2 stops
$1,405Air Canada
Wed, Aug 19 - Sun, Aug 23

United Airlines flights from Buenos Aires to St. Louis

Our best United Airlines deals on Buenos Aires to St. Louis flight tickets
United Airlines
Aug 19
EZE9:00 pmBuenos Aires Ministro Pistarini
17h 49m
2 stops
STL12:49 pmLambert-St Louis
Aug 23
STL8:30 pmLambert-St Louis
33h 30m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
$1,487
United Airlines
Aug 19
EZE9:00 pmBuenos Aires Ministro Pistarini
19h 08m
1 stop
STL2:08 pmLambert-St Louis
Aug 23
STL11:10 amLambert-St Louis
18h 50m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
$1,549
United Airlines
Aug 19
EZE9:00 pmBuenos Aires Ministro Pistarini
17h 49m
2 stops
STL12:49 pmLambert-St Louis
Aug 23
STL10:24 amLambert-St Louis
19h 36m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
$1,551

Delta flights from Buenos Aires to St. Louis

Our best Delta deals on Buenos Aires to St. Louis flight tickets
Delta
Jun 30
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 36m
1 stop
STL9:46 amLambert-St Louis
Jul 16
STL10:51 amLambert-St Louis
17h 19m
2 stops
EZE6:10 amBuenos Aires Ministro Pistarini
$1,228
Delta
Jun 30
EZE1:10 pmBuenos Aires Ministro Pistarini
22h 36m
2 stops
STL9:46 amLambert-St Louis
Jul 16
STL1:22 pmLambert-St Louis
18h 18m
2 stops
EZE9:40 amBuenos Aires Ministro Pistarini
$1,351
Delta
Jun 20
EZE10:40 pmBuenos Aires Ministro Pistarini
19h 10m
2 stops
STL3:50 pmLambert-St Louis
Jun 27
STL1:20 pmLambert-St Louis
18h 25m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,377

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 May 7, 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

Tue 6/30

8:10 pm-9:46 am

1 stop15h 36m

Lambert-St Louis

Thu 7/16

10:51 am-6:10 am

2 stops17h 19m

$1,228

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sat 6/20

1:10 pm-8:52 am

2 stops45h 42m

Lambert-St Louis

Sat 6/27

6:30 am-10:25 pm

2 stops37h 55m

$1,296

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 6/11

8:10 pm-9:46 am

1 stop15h 36m

Lambert-St Louis

Thu 6/18

10:51 am-9:45 am

1 stop20h 54m

$1,324

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 5/25

4:35 pm-8:09 pm

1 stop29h 34m

Lambert-St Louis

Sun 6/7

2:15 pm-2:30 pm

1 stop22h 15m

$1,337

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 5/25

8:25 am-2:39 pm

1 stop32h 14m

Lambert-St Louis

Sun 6/7

6:33 pm-4:30 am

2 stops55h 57m

$1,350

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 6/30

1:10 pm-9:46 am

2 stops22h 36m

Lambert-St Louis

Thu 7/16

1:22 pm-9:40 am

2 stops18h 18m

$1,351

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 5/25

4:35 pm-8:25 pm

3 stops53h 50m

Lambert-St Louis

Sun 6/7

2:15 pm-2:30 pm

2 stops22h 15m

$1,364

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sat 6/20

10:40 pm-3:50 pm

2 stops19h 10m

Lambert-St Louis

Sat 6/27

1:20 pm-9:45 am

1 stop18h 25m

$1,377

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sat 6/20

7:10 am-12:21 pm

3 stops31h 11m

Lambert-St Louis

Sat 6/27

2:15 pm-1:20 am

3 stops33h 05m

$1,383

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Wed 8/19

4:35 pm-6:42 pm

3 stops52h 07m

Lambert-St Louis

Sun 8/23

12:10 pm-2:30 pm

2 stops24h 20m

$1,405

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 6% 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 09m

Direct flights

None
The fastest flight from Buenos Aires to St. Louis takes 14h 09m
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

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 14h 09m, 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
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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