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Cheap flights from Buenos Aires to St. Louis from $638

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 2/23. 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

Delta Logo
8:10 pm - 8:14 amEZE-STL
14h 04m1 stop
Delta Logo
11:44 am - 9:00 amSTL-EZE
18h 16m1 stop
$888Delta
Find Deal
Thu, Oct 2 - Thu, Nov 13
United Airlines Logo
9:00 pm - 9:52 amEZE-STL
14h 52m1 stop
United Airlines Logo
6:15 am - 9:20 amSTL-EZE
24h 05m1 stop
$897United Airlines
Find Deal
Thu, Oct 2 - Thu, Nov 13
United Airlines Logo
9:00 pm - 12:28 pmEZE-STL
17h 28m2 stops
United Airlines Logo
8:20 am - 7:20 amSTL-EZE
20h 00m1 stop
$945United Airlines
Find Deal
Thu, Oct 2 - Thu, Nov 13
LATAM Airlines Logo
3:55 am - 8:05 amEZE-STL
30h 10m2 stops
LATAM Airlines Logo
6:00 am - 5:55 amSTL-EZE
20h 55m2 stops
$1,095LATAM Airlines
Find Deal
Sun, Oct 5 - Mon, Nov 17
Delta Logo
8:10 pm - 10:26 amEZE-STL
16h 16m1 stop
Delta Logo
11:44 am - 9:00 amSTL-EZE
18h 16m1 stop
$1,110Delta
Find Deal
Mon, Oct 6 - Mon, Nov 17
Delta Logo
8:10 pm - 10:26 amEZE-STL
16h 16m1 stop
Delta Logo
11:44 am - 9:00 amSTL-EZE
18h 16m1 stop
$1,111Delta
Find Deal
Mon, Oct 6 - Mon, Nov 17
LATAM Airlines Logo
7:40 am - 8:05 amEZE-STL
26h 25m2 stops
LATAM Airlines Logo
6:00 am - 5:55 amSTL-EZE
20h 55m2 stops
$1,115LATAM Airlines
Find Deal
Mon, Oct 6 - Mon, Nov 17
Multiple Airlines Logo
7:40 am - 3:18 pmEZE-STL
33h 38m3 stops
Multiple Airlines Logo
12:20 pm - 1:35 amSTL-EZE
34h 15m2 stops
$1,173Multiple Airlines
Find Deal
Thu, Oct 2 - Thu, Nov 13
Multiple Airlines Logo
7:30 am - 3:18 pmEZE-STL
33h 48m3 stops
Multiple Airlines Logo
12:20 pm - 12:35 amSTL-EZE
33h 15m3 stops
$1,251Multiple Airlines
Find Deal
Thu, Oct 2 - Thu, Nov 13
Air Canada Logo
4:45 pm - 3:29 pmEZE-STL
24h 44m2 stops
Air Canada Logo
6:43 pm - 3:10 pmSTL-EZE
41h 27m3 stops
$3,461Air Canada
Find Deal
Mon, Oct 27 - Wed, Nov 5

Delta flights from Buenos Aires to St. Louis

Our best Delta deals on Buenos Aires to St. Louis flight tickets
Delta
Oct 2
EZE8:10 pmBuenos Aires Ministro Pistarini
14h 04m
1 stop
STL8:14 amLambert-St Louis
Nov 13
STL11:44 amLambert-St Louis
18h 16m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
$888
Find similar
Delta
Oct 6
EZE8:10 pmBuenos Aires Ministro Pistarini
16h 16m
1 stop
STL10:26 amLambert-St Louis
Nov 17
STL11:44 amLambert-St Louis
18h 16m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
$1,110
Find similar
Delta
Oct 6
EZE8:10 pmBuenos Aires Ministro Pistarini
16h 16m
1 stop
STL10:26 amLambert-St Louis
Nov 17
STL11:44 amLambert-St Louis
18h 16m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
$1,111
Find similar

Air Canada flights from Buenos Aires to St. Louis

Our best Air Canada deals on Buenos Aires to St. Louis flight tickets
Air Canada
Sep 24
EZE4:35 pmBuenos Aires Ministro Pistarini
24h 43m
2 stops
STL3:18 pmLambert-St Louis
Sep 28
STL4:05 pmLambert-St Louis
20h 25m
2 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$1,545
Find similar
Air Canada
Sep 24
EZE4:35 pmBuenos Aires Ministro Pistarini
29h 03m
2 stops
STL7:38 pmLambert-St Louis
Sep 28
STL9:15 amLambert-St Louis
27h 15m
2 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$1,653
Find similar
Air Canada
Sep 24
EZE4:35 pmBuenos Aires Ministro Pistarini
24h 43m
2 stops
STL3:18 pmLambert-St Louis
Sep 28
STL9:15 amLambert-St Louis
27h 15m
2 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
$1,671
Find similar

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 September 16, 2025.
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

Thu 10/2

8:10 pm-8:14 am

1 stop14h 04m

Lambert-St Louis

Thu 11/13

11:44 am-9:00 am

1 stop18h 16m

$888

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 10/2

9:00 pm-9:52 am

1 stop14h 52m

Lambert-St Louis

Thu 11/13

6:15 am-9:20 am

1 stop24h 05m

$897

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 10/2

9:00 pm-12:28 pm

2 stops17h 28m

Lambert-St Louis

Thu 11/13

8:20 am-7:20 am

1 stop20h 00m

$945

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Sun 10/5

3:55 am-8:05 am

2 stops30h 10m

Lambert-St Louis

Mon 11/17

6:00 am-5:55 am

2 stops20h 55m

$1,095

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

8:10 pm-10:26 am

1 stop16h 16m

Lambert-St Louis

Mon 11/17

11:44 am-9:00 am

1 stop18h 16m

$1,110

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

8:10 pm-10:26 am

1 stop16h 16m

Lambert-St Louis

Mon 11/17

11:44 am-9:00 am

1 stop18h 16m

$1,111

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

7:40 am-8:05 am

2 stops26h 25m

Lambert-St Louis

Mon 11/17

6:00 am-5:55 am

2 stops20h 55m

$1,115

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 10/2

7:40 am-3:18 pm

3 stops33h 38m

Lambert-St Louis

Thu 11/13

12:20 pm-1:35 am

2 stops34h 15m

$1,173

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 10/2

7:30 am-3:18 pm

3 stops33h 48m

Lambert-St Louis

Thu 11/13

12:20 pm-12:35 am

3 stops33h 15m

$1,251

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/27

4:45 pm-3:29 pm

2 stops24h 44m

Lambert-St Louis

Wed 11/5

6:43 pm-3:10 pm

3 stops41h 27m

$3,461

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Monday when prices can be found for as low as $958. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $1,214. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Buenos Aires in the morning is the least expensive time of day to depart. momondo users have found prices as low as $958 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,171 per ticket.

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

You could potentially save up to 5% 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

Direct flights

None
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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  • 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 04m, 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
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
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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