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Cheap flights from Buenos Aires to St. Louis from $449

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.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
11:30 am - 5:53 pm
EZE
-
STL
32h 23m
2 stops
LATAM Airlines Logo
5:30 pm - 11:30 am
STL
-
EZE
16h 00m
2 stops
$1,278LATAM Airlines
Tue, Apr 7 - Thu, Jun 11
Delta Logo
8:10 pm - 9:05 am
EZE
-
STL
14h 55m
1 stop
Delta Logo
5:30 pm - 9:45 am
STL
-
EZE
14h 15m
1 stop
$1,280Delta
Mon, Apr 6 - Wed, Jun 10
LATAM Airlines Logo
1:20 pm - 5:53 pm
EZE
-
STL
30h 33m
2 stops
LATAM Airlines Logo
1:30 pm - 8:35 am
STL
-
EZE
17h 05m
2 stops
$1,284LATAM Airlines
Tue, Apr 7 - Thu, Jun 11
LATAM Airlines Logo
3:55 am - 11:58 pm
EZE
-
STL
22h 03m
2 stops
LATAM Airlines Logo
5:30 pm - 11:30 am
STL
-
EZE
16h 00m
2 stops
$1,333LATAM Airlines
Sun, Apr 5 - Sat, Jun 13
Delta Logo
8:10 pm - 4:16 pm
EZE
-
STL
22h 06m
1 stop
Delta Logo
3:42 pm - 9:45 am
STL
-
EZE
16h 03m
1 stop
$1,335Delta
Mon, Apr 6 - Sat, Jun 13
LATAM Airlines Logo
7:35 am - 11:09 am
EZE
-
STL
29h 34m
3 stops
LATAM Airlines Logo
10:55 am - 11:30 am
STL
-
EZE
22h 35m
2 stops
$1,336LATAM Airlines
Mon, Apr 6 - Sat, Jun 13
LATAM Airlines Logo
7:35 am - 11:58 pm
EZE
-
STL
18h 23m
2 stops
LATAM Airlines Logo
6:00 am - 8:35 am
STL
-
EZE
24h 35m
2 stops
$1,338LATAM Airlines
Wed, Apr 1 - Sun, Jun 14
LATAM Airlines Logo
1:20 pm - 11:09 am
EZE
-
STL
23h 49m
2 stops
LATAM Airlines Logo
5:30 pm - 9:45 am
STL
-
EZE
14h 15m
1 stop
$1,340LATAM Airlines
Sat, Apr 11 - Thu, Jun 18
Delta Logo
8:10 pm - 11:09 am
EZE
-
STL
16h 59m
1 stop
Delta Logo
7:05 pm - 9:45 am
STL
-
EZE
12h 40m
1 stop
$1,437Delta
Tue, Apr 7 - Thu, Jun 11
Delta Logo
8:10 pm - 9:05 am
EZE
-
STL
14h 55m
1 stop
Delta Logo
7:05 pm - 9:45 am
STL
-
EZE
12h 40m
1 stop
$1,439Delta
Tue, Apr 7 - Thu, Jun 11

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
EZE7:35 amBuenos Aires Ministro Pistarini
18h 23m
2 stops
STL11:58 pmLambert-St Louis
Jun 10
STL1:30 pmLambert-St Louis
20h 00m
2 stops
EZE11:30 amBuenos Aires Ministro Pistarini
$1,276
LATAM Airlines
Apr 7
EZE11:30 amBuenos Aires Ministro Pistarini
32h 23m
2 stops
STL5:53 pmLambert-St Louis
Jun 11
STL5:30 pmLambert-St Louis
16h 00m
2 stops
EZE11:30 amBuenos Aires Ministro Pistarini
$1,278
LATAM Airlines
Apr 6
EZE7:35 amBuenos Aires Ministro Pistarini
27h 30m
2 stops
STL9:05 amLambert-St Louis
Jun 10
STL5:30 pmLambert-St Louis
25h 30m
2 stops
EZE9:00 pmBuenos Aires Ministro Pistarini
$1,280

Air Canada flights from Buenos Aires to St. Louis

Our best Air Canada deals on Buenos Aires to St. Louis flight tickets
Air Canada
Apr 6
EZE4:30 pmBuenos Aires Ministro Pistarini
24h 54m
2 stops
STL3:24 pmLambert-St Louis
Jun 13
STL1:00 pmLambert-St Louis
47h 30m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$2,440
Air Canada
Apr 1
EZE4:30 pmBuenos Aires Ministro Pistarini
24h 54m
2 stops
STL3:24 pmLambert-St Louis
Jun 14
STL1:00 pmLambert-St Louis
23h 30m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$2,494
Air Canada
Apr 1
EZE4:30 pmBuenos Aires Ministro Pistarini
24h 54m
2 stops
STL3:24 pmLambert-St Louis
Jun 14
STL1:00 pmLambert-St Louis
23h 30m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$2,498

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 February 4, 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

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

11:30 am-5:53 pm

2 stops32h 23m

Lambert-St Louis

Thu 6/11

5:30 pm-11:30 am

2 stops16h 00m

$1,278

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

8:10 pm-9:05 am

1 stop14h 55m

Lambert-St Louis

Wed 6/10

5:30 pm-9:45 am

1 stop14h 15m

$1,280

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

1:20 pm-5:53 pm

2 stops30h 33m

Lambert-St Louis

Thu 6/11

1:30 pm-8:35 am

2 stops17h 05m

$1,284

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 4/5

3:55 am-11:58 pm

2 stops22h 03m

Lambert-St Louis

Sat 6/13

5:30 pm-11:30 am

2 stops16h 00m

$1,333

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

8:10 pm-4:16 pm

1 stop22h 06m

Lambert-St Louis

Sat 6/13

3:42 pm-9:45 am

1 stop16h 03m

$1,335

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 4/6

7:35 am-11:09 am

3 stops29h 34m

Lambert-St Louis

Sat 6/13

10:55 am-11:30 am

2 stops22h 35m

$1,336

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Wed 4/1

7:35 am-11:58 pm

2 stops18h 23m

Lambert-St Louis

Sun 6/14

6:00 am-8:35 am

2 stops24h 35m

$1,338

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sat 4/11

1:20 pm-11:09 am

2 stops23h 49m

Lambert-St Louis

Thu 6/18

5:30 pm-9:45 am

1 stop14h 15m

$1,340

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

7:05 pm-9:45 am

1 stop12h 40m

$1,437

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 4/7

8:10 pm-9:05 am

1 stop14h 55m

Lambert-St Louis

Thu 6/11

7:05 pm-9:45 am

1 stop12h 40m

$1,439

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

What is the cheapest airline that flies from Buenos Aires to Lambert-St Louis?

Air Canada is the most popular carrier operating from Buenos Aires to Lambert-St Louis

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

20h 28m

Direct flights

None
The fastest flight from Buenos Aires to St. Louis takes 20h 28m
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 20h 28m, 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
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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