Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Buenos Aires to St. Louis from $525

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.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Buenos Aires to St. Louis

Cheap round-trip flights

American Airlines Logo
9:15 pm - 3:41 pmEZE-STL
20h 26m2 stops
American Airlines Logo
1:52 pm - 10:15 amSTL-EZE
17h 23m2 stops
$930American Airlines
Find Deal
Tue, Oct 21 - Tue, Dec 2
American Airlines Logo
8:30 pm - 11:56 pmEZE-STL
29h 26m1 stop
American Airlines Logo
1:20 pm - 8:15 amSTL-EZE
15h 55m1 stop
$936American Airlines
Find Deal
Tue, Oct 21 - Tue, Dec 2
LATAM Airlines Logo
3:55 am - 8:05 amEZE-STL
30h 10m2 stops
LATAM Airlines Logo
1:30 pm - 2:50 amSTL-EZE
34h 20m2 stops
$1,074LATAM Airlines
Find Deal
Mon, Oct 20 - Tue, Dec 2
Delta Logo
8:10 pm - 12:31 pmEZE-STL
18h 21m1 stop
Delta Logo
6:42 pm - 9:45 amSTL-EZE
13h 03m1 stop
$1,198Delta
Find Deal
Thu, Sep 25 - Mon, Sep 29
Delta Logo
8:10 pm - 9:59 amEZE-STL
15h 49m1 stop
Delta Logo
6:42 pm - 9:45 amSTL-EZE
13h 03m1 stop
$1,208Delta
Find Deal
Thu, Sep 25 - Mon, Sep 29
LATAM Airlines Logo
6:15 am - 8:05 amEZE-STL
27h 50m2 stops
LATAM Airlines Logo
6:00 am - 8:55 pmSTL-EZE
35h 55m2 stops
$1,212LATAM Airlines
Find Deal
Mon, Oct 6 - Thu, Nov 13
Air Canada Logo
4:35 pm - 7:57 pmEZE-STL
53h 22m3 stops
Air Canada Logo
4:05 pm - 3:10 pmSTL-EZE
20h 05m2 stops
$1,646Air Canada
Find Deal
Mon, Oct 6 - Thu, Nov 13
Logo
6:40 am - 7:38 pmEZE-STL
38h 58m2 stops
Logo
1:00 pm - 3:10 pmSTL-EZE
23h 10m3 stops
$1,924
Find Deal
Tue, Oct 21 - Tue, Dec 2
Logo
4:35 pm - 7:38 pmEZE-STL
29h 03m2 stops
Logo
6:43 pm - 3:10 pmSTL-EZE
41h 27m3 stops
$2,413
Find Deal
Mon, Oct 6 - Mon, Nov 17
Air Canada Logo
4:35 pm - 2:27 pmEZE-STL
23h 52m3 stops
Air Canada Logo
9:20 am - 2:30 pmSTL-EZE
51h 10m3 stops
$3,070Air Canada
Find Deal
Mon, Oct 6 - Sat, Oct 18

Delta flights from Buenos Aires to St. Louis

Our best Delta deals on Buenos Aires to St. Louis flight tickets
Delta
Sep 25
EZE8:10 pmBuenos Aires Ministro Pistarini
18h 21m
1 stop
STL12:31 pmLambert-St Louis
Sep 29
STL6:42 pmLambert-St Louis
13h 03m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,198
Find similar
Delta
Sep 25
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 49m
1 stop
STL9:59 amLambert-St Louis
Sep 29
STL6:42 pmLambert-St Louis
13h 03m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,208
Find similar
Delta
Sep 25
EZE7:40 amBuenos Aires Ministro Pistarini
30h 51m
2 stops
STL12:31 pmLambert-St Louis
Sep 29
STL6:42 pmLambert-St Louis
13h 03m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
$1,209
Find similar

LATAM Airlines flights from Buenos Aires to St. Louis

Our best LATAM Airlines deals on Buenos Aires to St. Louis flight tickets
LATAM Airlines
Oct 20
EZE3:55 amBuenos Aires Ministro Pistarini
30h 10m
2 stops
STL8:05 amLambert-St Louis
Dec 2
STL1:30 pmLambert-St Louis
34h 20m
2 stops
EZE2:50 amBuenos Aires Ministro Pistarini
$1,074
Find similar
LATAM Airlines
Oct 6
EZE6:15 amBuenos Aires Ministro Pistarini
27h 50m
2 stops
STL8:05 amLambert-St Louis
Nov 13
STL6:00 amLambert-St Louis
35h 55m
2 stops
EZE8:55 pmBuenos Aires Ministro Pistarini
$1,212
Find similar
LATAM Airlines
Oct 5
EZE3:55 amBuenos Aires Ministro Pistarini
21h 46m
2 stops
STL11:41 pmLambert-St Louis
Oct 18
STL10:30 amLambert-St Louis
28h 41m
2 stops
EZE5:11 pmBuenos Aires Ministro Pistarini
$1,286
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 July 31, 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

Tue 10/21

9:15 pm-3:41 pm

2 stops20h 26m

Lambert-St Louis

Tue 12/2

1:52 pm-10:15 am

2 stops17h 23m

$930

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 10/21

8:30 pm-11:56 pm

1 stop29h 26m

Lambert-St Louis

Tue 12/2

1:20 pm-8:15 am

1 stop15h 55m

$936

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/20

3:55 am-8:05 am

2 stops30h 10m

Lambert-St Louis

Tue 12/2

1:30 pm-2:50 am

2 stops34h 20m

$1,074

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/25

8:10 pm-12:31 pm

1 stop18h 21m

Lambert-St Louis

Mon 9/29

6:42 pm-9:45 am

1 stop13h 03m

$1,198

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Thu 9/25

8:10 pm-9:59 am

1 stop15h 49m

Lambert-St Louis

Mon 9/29

6:42 pm-9:45 am

1 stop13h 03m

$1,208

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

6:15 am-8:05 am

2 stops27h 50m

Lambert-St Louis

Thu 11/13

6:00 am-8:55 pm

2 stops35h 55m

$1,212

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

4:35 pm-7:57 pm

3 stops53h 22m

Lambert-St Louis

Thu 11/13

4:05 pm-3:10 pm

2 stops20h 05m

$1,646

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Tue 10/21

6:40 am-7:38 pm

2 stops38h 58m

Lambert-St Louis

Tue 12/2

1:00 pm-3:10 pm

3 stops23h 10m

$1,924

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

4:35 pm-7:38 pm

2 stops29h 03m

Lambert-St Louis

Mon 11/17

6:43 pm-3:10 pm

3 stops41h 27m

$2,413

Buenos AiresSt. Louis

EZE - STL

EZESTL

Buenos Aires Ministro Pistarini

Mon 10/6

4:35 pm-2:27 pm

3 stops23h 52m

Lambert-St Louis

Sat 10/18

9:20 am-2:30 pm

3 stops51h 10m

$3,070

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 36% 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

Best Price Found

$525

Fastest flight time

13h 55m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Buenos Aires in the past 72 hours is $525. The best round-trip flight deal from Buenos Aires to St. Louis found on momondo in the last 72 hours is $930.
The fastest flight from Buenos Aires to St. Louis takes 13h 55m
There are no direct flights from Buenos Aires to St. Louis. Popular non-direct route for this connection is Buenos Aires Ministro Pistarini Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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 13h 55m, 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
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/5
Tue 8/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States