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Cheap flights from St. Louis to Buenos Aires from $456

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 12/2. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
1:30 pm - 9:40 am
STL
-
EZE
17h 10m
2 stops
LATAM Airlines Logo
1:10 pm - 5:06 pm
EZE
-
STL
30h 56m
2 stops
$1,126LATAM Airlines
Wed, Dec 2 - Tue, Mar 2
United Airlines Logo
1:08 pm - 9:20 am
STL
-
EZE
17h 12m
2 stops
United Airlines Logo
10:05 pm - 9:42 am
EZE
-
STL
14h 37m
1 stop
$1,148United Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
2:25 pm - 9:40 am
STL
-
EZE
17h 15m
2 stops
LATAM Airlines Logo
8:10 pm - 6:15 pm
EZE
-
STL
24h 05m
1 stop
$1,152LATAM Airlines
Thu, Oct 15 - Thu, Oct 22
American Airlines Logo
11:35 am - 8:45 am
STL
-
EZE
19h 10m
1 stop
American Airlines Logo
10:30 pm - 10:39 am
EZE
-
STL
14h 09m
1 stop
$1,163American Airlines
Thu, Aug 20 - Thu, Aug 27
LATAM Airlines Logo
11:51 am - 9:40 am
STL
-
EZE
18h 49m
2 stops
LATAM Airlines Logo
4:00 am - 5:06 pm
EZE
-
STL
40h 06m
2 stops
$1,164LATAM Airlines
Thu, Nov 19 - Fri, Nov 27
United Airlines Logo
11:15 am - 8:00 am
STL
-
EZE
18h 45m
1 stop
United Airlines Logo
9:00 pm - 5:06 pm
EZE
-
STL
22h 06m
2 stops
$1,167United Airlines
Thu, Aug 20 - Thu, Aug 27
LATAM Airlines Logo
9:00 am - 6:20 am
STL
-
EZE
18h 20m
2 stops
LATAM Airlines Logo
7:20 am - 11:39 pm
EZE
-
STL
19h 19m
2 stops
$1,188LATAM Airlines
Mon, Jan 4 - Sun, Jan 24
Delta Logo
1:30 pm - 9:40 am
STL
-
EZE
17h 10m
2 stops
Delta Logo
7:20 am - 11:39 pm
EZE
-
STL
19h 19m
2 stops
$1,192Delta
Thu, Nov 19 - Fri, Nov 27
LATAM Airlines Logo
6:00 am - 9:40 am
STL
-
EZE
25h 40m
2 stops
LATAM Airlines Logo
7:35 am - 8:09 am
EZE
-
STL
26h 34m
2 stops
$1,212LATAM Airlines
Sat, Aug 22 - Sat, Aug 29
LATAM Airlines Logo
11:51 am - 9:40 am
STL
-
EZE
18h 49m
2 stops
LATAM Airlines Logo
7:20 am - 10:48 am
EZE
-
STL
30h 28m
2 stops
$1,217LATAM Airlines
Thu, Dec 10 - Sat, Dec 19

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

Our best United Airlines deals on St. Louis to Buenos Aires Ministro Pistarini Airport flight tickets
United Airlines
Dec 2
STL11:00 amLambert-St Louis
17h 20m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 17
EZE10:05 pmBuenos Aires Ministro Pistarini
14h 37m
1 stop
STL9:42 amLambert-St Louis
$1,148
United Airlines
Aug 20
STL11:15 amLambert-St Louis
18h 45m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Aug 27
EZE9:00 pmBuenos Aires Ministro Pistarini
22h 06m
2 stops
STL5:06 pmLambert-St Louis
$1,167
United Airlines
Jul 15
STL11:10 amLambert-St Louis
18h 50m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Jul 23
EZE9:00 pmBuenos Aires Ministro Pistarini
47h 13m
2 stops
STL6:13 pmLambert-St Louis
$1,200

Air Canada flights from St. Louis to Buenos Aires Ministro Pistarini Airport

Our best Air Canada deals on St. Louis to Buenos Aires Ministro Pistarini Airport flight tickets
Air Canada
Jul 15
STL12:10 pmLambert-St Louis
24h 20m
2 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jul 23
EZE4:35 pmBuenos Aires Ministro Pistarini
28h 07m
3 stops
STL6:42 pmLambert-St Louis
$2,082
Air Canada
Jul 15
STL12:10 pmLambert-St Louis
24h 20m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jul 23
EZE4:35 pmBuenos Aires Ministro Pistarini
28h 07m
3 stops
STL6:42 pmLambert-St Louis
$2,446
Air Canada
Jul 13
STL12:10 pmLambert-St Louis
48h 20m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jul 18
EZE4:35 pmBuenos Aires Ministro Pistarini
23h 27m
2 stops
STL2:02 pmLambert-St Louis
$2,954

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 July 12, 2026.
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

Cheapest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 12/2

1:30 pm-9:40 am

2 stops17h 10m

Buenos Aires Ministro Pistarini

Tue 3/2

1:10 pm-5:06 pm

2 stops30h 56m

$1,126
Quickest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 12/2

1:08 pm-9:20 am

2 stops17h 12m

Buenos Aires Ministro Pistarini

Thu 12/17

10:05 pm-9:42 am

1 stop14h 37m

$1,148

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 10/15

2:25 pm-9:40 am

2 stops17h 15m

Buenos Aires Ministro Pistarini

Thu 10/22

8:10 pm-6:15 pm

1 stop24h 05m

$1,152

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 8/20

11:35 am-8:45 am

1 stop19h 10m

Buenos Aires Ministro Pistarini

Thu 8/27

10:30 pm-10:39 am

1 stop14h 09m

$1,163

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 11/19

11:51 am-9:40 am

2 stops18h 49m

Buenos Aires Ministro Pistarini

Fri 11/27

4:00 am-5:06 pm

2 stops40h 06m

$1,164

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 8/20

11:15 am-8:00 am

1 stop18h 45m

Buenos Aires Ministro Pistarini

Thu 8/27

9:00 pm-5:06 pm

2 stops22h 06m

$1,167

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 1/4

9:00 am-6:20 am

2 stops18h 20m

Buenos Aires Ministro Pistarini

Sun 1/24

7:20 am-11:39 pm

2 stops19h 19m

$1,188

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 11/19

1:30 pm-9:40 am

2 stops17h 10m

Buenos Aires Ministro Pistarini

Fri 11/27

7:20 am-11:39 pm

2 stops19h 19m

$1,192

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 8/22

6:00 am-9:40 am

2 stops25h 40m

Buenos Aires Ministro Pistarini

Sat 8/29

7:35 am-8:09 am

2 stops26h 34m

$1,212

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 12/10

11:51 am-9:40 am

2 stops18h 49m

Buenos Aires Ministro Pistarini

Sat 12/19

7:20 am-10:48 am

2 stops30h 28m

$1,217

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 month to fly to Buenos Aires Ministro Pistarini Airport?

If you aren’t able to travel during the month of August, then book flights to Buenos Aires Ministro Pistarini Airport from St. Louis during April instead. Flights to Buenos Aires Ministro Pistarini Airport in April, while not as cheap as those in August, still average around $0.

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

16h 44m

Direct flights

None
The fastest flight from St. Louis to Buenos Aires Ministro Pistarini Airport takes 16h 44m
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

Frequently asked questions about flying from St. Louis to Buenos Aires Ministro Pistarini Airport

  • 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 16h 44m.

  • 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
LATAM AirlinesPriceFrom $884Free CancellationRating
7.4
1,954 reviews
Search LATAM Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.8
8,458 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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