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Cheap flights from St. Louis to Buenos Aires from $368

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 1/26. 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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LATAM Airlines Logo
5:00 pm - 9:00 am
STL
-
EZE
14h 00m1 stop
LATAM Airlines Logo
4:05 am - 11:42 pm
EZE
-
STL
21h 37m2 stops
$936LATAM Airlines
Tue, Mar 10 - Wed, Mar 25
LATAM Airlines Logo
5:00 pm - 9:35 am
STL
-
EZE
14h 35m2 stops
LATAM Airlines Logo
4:05 am - 11:42 pm
EZE
-
STL
21h 37m2 stops
$940LATAM Airlines
Tue, Mar 10 - Wed, Mar 25
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m2 stops
United Airlines Logo
9:05 pm - 2:42 pm
EZE
-
STL
19h 37m2 stops
$956United Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m2 stops
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m1 stop
$1,002United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
10:02 am - 9:00 am
STL
-
EZE
20h 58m1 stop
LATAM Airlines Logo
8:55 pm - 8:52 am
EZE
-
STL
13h 57m1 stop
$1,013LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
1:30 pm - 9:45 am
STL
-
EZE
18h 15m1 stop
LATAM Airlines Logo
7:35 am - 7:12 pm
EZE
-
STL
37h 37m3 stops
$1,021LATAM Airlines
Wed, May 27 - Mon, Jun 8
United Airlines Logo
10:20 am - 7:20 am
STL
-
EZE
18h 00m1 stop
United Airlines Logo
10:05 pm - 9:23 am
EZE
-
STL
14h 18m1 stop
$1,026United Airlines
Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
1:30 pm - 8:35 am
STL
-
EZE
17h 05m2 stops
Multiple Airlines Logo
8:10 pm - 8:07 am
EZE
-
STL
13h 57m1 stop
$1,030Multiple Airlines
Wed, May 27 - Mon, Jun 8
LATAM Airlines Logo
9:59 am - 9:00 am
STL
-
EZE
20h 01m1 stop
LATAM Airlines Logo
8:55 pm - 9:06 am
EZE
-
STL
15h 11m1 stop
$1,066LATAM Airlines
Thu, Feb 5 - Fri, Feb 13
United Airlines Logo
4:35 pm - 9:20 am
STL
-
EZE
13h 45m1 stop
United Airlines Logo
11:55 pm - 3:52 pm
EZE
-
STL
18h 57m1 stop
$1,101United Airlines
Mon, Feb 2 - Mon, Feb 9

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
Mar 10
STL5:00 pmLambert-St Louis
14h 00m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 25
EZE4:05 amBuenos Aires Ministro Pistarini
21h 37m
2 stops
STL11:42 pmLambert-St Louis
$936
Find similar
LATAM Airlines
Mar 10
STL5:00 pmLambert-St Louis
14h 35m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 25
EZE4:05 amBuenos Aires Ministro Pistarini
21h 37m
2 stops
STL11:42 pmLambert-St Louis
$940
Find similar
LATAM Airlines
Mar 8
STL10:02 amLambert-St Louis
20h 58m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 17
EZE8:55 pmBuenos Aires Ministro Pistarini
13h 57m
1 stop
STL8:52 amLambert-St Louis
$1,013
Find similar

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
Jan 13
STL5:00 pmLambert-St Louis
13h 00m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Jan 20
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 58m
1 stop
STL8:53 amLambert-St Louis
$1,176
Find similar
Delta
Jan 25
STL6:57 pmLambert-St Louis
35h 03m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Feb 3
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 58m
1 stop
STL8:53 amLambert-St Louis
$1,184
Find similar
Delta
Jan 11
STL6:55 pmLambert-St Louis
33h 25m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Jan 20
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 58m
1 stop
STL8:53 amLambert-St Louis
$1,224
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 December 18, 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 3/10

5:00 pm-9:00 am

1 stop14h 00m

Buenos Aires Ministro Pistarini

Wed 3/25

4:05 am-11:42 pm

2 stops21h 37m

$936

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/10

5:00 pm-9:35 am

2 stops14h 35m

Buenos Aires Ministro Pistarini

Wed 3/25

4:05 am-11:42 pm

2 stops21h 37m

$940

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

7:41 am-8:20 am

2 stops46h 39m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-2:42 pm

2 stops19h 37m

$956

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

7:41 am-8:20 am

2 stops46h 39m

Buenos Aires Ministro Pistarini

Tue 3/17

9:05 pm-9:21 am

1 stop14h 16m

$1,002

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

10:02 am-9:00 am

1 stop20h 58m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-8:52 am

1 stop13h 57m

$1,013

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/27

1:30 pm-9:45 am

1 stop18h 15m

Buenos Aires Ministro Pistarini

Mon 6/8

7:35 am-7:12 pm

3 stops37h 37m

$1,021

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 2/4

10:20 am-7:20 am

1 stop18h 00m

Buenos Aires Ministro Pistarini

Wed 2/11

10:05 pm-9:23 am

1 stop14h 18m

$1,026

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/27

1:30 pm-8:35 am

2 stops17h 05m

Buenos Aires Ministro Pistarini

Mon 6/8

8:10 pm-8:07 am

1 stop13h 57m

$1,030

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 2/5

9:59 am-9:00 am

1 stop20h 01m

Buenos Aires Ministro Pistarini

Fri 2/13

8:55 pm-9:06 am

1 stop15h 11m

$1,066

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/2

4:35 pm-9:20 am

1 stop13h 45m

Buenos Aires Ministro Pistarini

Mon 2/9

11:55 pm-3:52 pm

1 stop18h 57m

$1,101

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 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

Fastest flight time

14h 58m

Direct flights

None
The fastest flight from St. Louis to Buenos Aires Ministro Pistarini Airport takes 14h 58m
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.
Search flight deals

  • 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 14h 58m.

  • 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
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,005 reviews
Search Delta 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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