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Cheap flights from St. Louis to Buenos Aires from $345

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Buenos Aires departing on 12/30. 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

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Delta Logo
1:55 pm - 9:00 amSTL-EZE
16h 05m1 stop
Delta Logo
8:55 pm - 9:59 amEZE-STL
16h 04m1 stop
$830Delta
Find Deal
Tue, Nov 18 - Wed, Nov 26
Delta Logo
10:45 am - 10:15 amSTL-EZE
20h 30m2 stops
Delta Logo
10:25 pm - 6:35 pmEZE-STL
23h 10m2 stops
$834Delta
Find Deal
Tue, Nov 18 - Wed, Nov 26
LATAM Airlines Logo
6:00 am - 9:35 amSTL-EZE
24h 35m2 stops
LATAM Airlines Logo
7:45 am - 9:04 amEZE-STL
27h 19m3 stops
$837LATAM Airlines
Find Deal
Mon, Jan 12 - Tue, Mar 24
LATAM Airlines Logo
6:00 am - 6:20 amSTL-EZE
22h 20m2 stops
LATAM Airlines Logo
3:55 pm - 9:04 amEZE-STL
43h 09m2 stops
$860LATAM Airlines
Find Deal
Wed, Mar 11 - Sun, Mar 22
American Airlines Logo
6:00 am - 8:25 amSTL-EZE
23h 25m1 stop
American Airlines Logo
11:20 pm - 10:27 amEZE-STL
14h 07m1 stop
$930American Airlines
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Fri, Jan 30 - Sat, Feb 14
American Airlines Logo
11:05 am - 8:25 amSTL-EZE
18h 20m2 stops
American Airlines Logo
11:20 pm - 10:27 amEZE-STL
14h 07m1 stop
$934American Airlines
Find Deal
Fri, Jan 30 - Sat, Feb 14
United Airlines Logo
4:49 pm - 9:20 amSTL-EZE
37h 31m2 stops
United Airlines Logo
11:55 pm - 9:00 pmEZE-STL
48h 05m2 stops
$950United Airlines
Find Deal
Sat, Jan 31 - Sun, Feb 15
United Airlines Logo
6:15 am - 9:20 amSTL-EZE
24h 05m1 stop
United Airlines Logo
10:05 pm - 9:55 pmEZE-STL
26h 50m1 stop
$1,086United Airlines
Find Deal
Tue, Dec 16 - Mon, Dec 22
GOL Logo
11:30 am - 12:50 pmSTL-EZE
23h 20m2 stops
GOL Logo
3:30 am - 10:04 pmEZE-STL
20h 34m2 stops
$1,243GOL
Find Deal
Sun, Mar 8 - Mon, Mar 16
GOL Logo
11:30 am - 12:50 pmSTL-EZE
23h 20m2 stops
GOL Logo
3:30 am - 10:04 pmEZE-STL
20h 34m2 stops
$1,249GOL
Find Deal
Sun, Mar 8 - Mon, Mar 16

Delta flights from St. Louis to Buenos Aires Ministro Pistarini Airport

Our best Delta deals on St. Louis to Buenos Aires Ministro Pistarini Airport flight tickets
Delta
Nov 18
STL1:55 pmLambert-St Louis
16h 05m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Nov 26
EZE8:55 pmBuenos Aires Ministro Pistarini
16h 04m
1 stop
STL9:59 amLambert-St Louis
$830
Find similar
Delta
Nov 18
STL10:45 amLambert-St Louis
20h 30m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Nov 26
EZE10:25 pmBuenos Aires Ministro Pistarini
23h 10m
2 stops
STL6:35 pmLambert-St Louis
$834
Find similar
Delta
Mar 8
STL10:00 amLambert-St Louis
19h 20m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
20h 06m
1 stop
STL3:01 pmLambert-St Louis
$880
Find similar

LATAM Airlines flights from St. Louis to Buenos Aires Ministro Pistarini Airport

Our best LATAM Airlines deals on St. Louis to Buenos Aires Ministro Pistarini Airport flight tickets
LATAM Airlines
Jan 12
STL6:00 amLambert-St Louis
24h 35m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 24
EZE7:45 amBuenos Aires Ministro Pistarini
27h 19m
3 stops
STL9:04 amLambert-St Louis
$837
Find similar
LATAM Airlines
Mar 11
STL6:00 amLambert-St Louis
22h 20m
2 stops
EZE6:20 amBuenos Aires Ministro Pistarini
Mar 22
EZE3:55 pmBuenos Aires Ministro Pistarini
43h 09m
2 stops
STL9:04 amLambert-St Louis
$860
Find similar
LATAM Airlines
Mar 8
STL6:00 amLambert-St Louis
25h 35m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 17
EZE7:45 amBuenos Aires Ministro Pistarini
27h 19m
3 stops
STL9:04 amLambert-St Louis
$887
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Buenos Aires Ministro Pistarini Airport 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 November 2, 2025.
Use the filters below to find and compare flights from St. Louis to Buenos Aires Ministro Pistarini Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

1:55 pm-9:00 am

1 stop16h 05m

Buenos Aires Ministro Pistarini

Wed 11/26

8:55 pm-9:59 am

1 stop16h 04m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

10:45 am-10:15 am

2 stops20h 30m

Buenos Aires Ministro Pistarini

Wed 11/26

10:25 pm-6:35 pm

2 stops23h 10m

$834

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 1/12

6:00 am-9:35 am

2 stops24h 35m

Buenos Aires Ministro Pistarini

Tue 3/24

7:45 am-9:04 am

3 stops27h 19m

$837

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 3/11

6:00 am-6:20 am

2 stops22h 20m

Buenos Aires Ministro Pistarini

Sun 3/22

3:55 pm-9:04 am

2 stops43h 09m

$860

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 1/30

6:00 am-8:25 am

1 stop23h 25m

Buenos Aires Ministro Pistarini

Sat 2/14

11:20 pm-10:27 am

1 stop14h 07m

$930

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 1/30

11:05 am-8:25 am

2 stops18h 20m

Buenos Aires Ministro Pistarini

Sat 2/14

11:20 pm-10:27 am

1 stop14h 07m

$934

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/31

4:49 pm-9:20 am

2 stops37h 31m

Buenos Aires Ministro Pistarini

Sun 2/15

11:55 pm-9:00 pm

2 stops48h 05m

$950

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 12/16

6:15 am-9:20 am

1 stop24h 05m

Buenos Aires Ministro Pistarini

Mon 12/22

10:05 pm-9:55 pm

1 stop26h 50m

$1,086

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

11:30 am-12:50 pm

2 stops23h 20m

Buenos Aires Ministro Pistarini

Mon 3/16

3:30 am-10:04 pm

2 stops20h 34m

$1,243

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

11:30 am-12:50 pm

2 stops23h 20m

Buenos Aires Ministro Pistarini

Mon 3/16

3:30 am-10:04 pm

2 stops20h 34m

$1,249

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Buenos Aires Ministro Pistarini Airport

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 Buenos Aires Ministro Pistarini Airport?

Our data shows that Tuesday is the least expensive day to fly to Buenos Aires Ministro Pistarini Airport. Tickets to fly out on this day can be as low as $1,023. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires Ministro Pistarini Airport on Wednesday is $1,341.

What is the cheapest time of day to depart on your flight to Buenos Aires Ministro Pistarini Airport?

According to our data, the cheapest time of day to fly to Buenos Aires Ministro Pistarini Airport is in the evening. momondo users have found flights departing from St. Louis to Buenos Aires Ministro Pistarini Airport in the evening for as low as $1,188. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,287 on average. Flights to Buenos Aires Ministro Pistarini Airport from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from St. Louis to Buenos Aires Ministro Pistarini Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Buenos Aires Ministro Pistarini Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Buenos Aires Ministro Pistarini Airport (STL to EZE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Buenos Aires Ministro Pistarini Airport

Direct flights

None
There are no direct flights from St. Louis to Buenos Aires Ministro Pistarini Airport. There are no popular flight routes from St. Louis to Buenos Aires Ministro Pistarini Airport.
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  • How far is Lambert-St Louis to Buenos Aires Ministro Pistarini by plane?

    Buenos Aires Ministro Pistarini is 5460.2 mi away from Lambert-St Louis. A reasonable flight in good conditions will take 12h 32m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Buenos Aires Ministro Pistarini Airport?

    Prices for flights from Lambert-St Louis Airport to Buenos Aires Ministro Pistarini Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Buenos Aires Ministro Pistarini Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Buenos Aires Ministro Pistarini Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Buenos Aires Ministro Pistarini Airport.

  • What documentation or ID do you need to fly to Buenos Aires Ministro Pistarini Airport?

    The necessary travel and health documents for your Buenos Aires Ministro Pistarini Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Buenos Aires Ministro Pistarini Airport?

Best airlines flying from St. Louis to Buenos Aires Ministro Pistarini Airport

Compare and see reviews for airlines that fly from St. Louis to Buenos Aires Ministro Pistarini Airport with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $1,023Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $1,081Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Buenos Aires?

Finding the right flight to Buenos Aires from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Buenos Aires quick and easy, saving you time and money.

Can I find flights from St. Louis to Buenos Aires with flexible booking policies on momondo?

Yes. All flights to Buenos Aires from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Buenos Aires?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Buenos Aires from St. Louis.

I’m not ready to book a flight from St. Louis to Buenos Aires right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Buenos Aires from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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