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Cheap flights from St. Louis to Buenos Aires from $1,112

This is the cheapest round-trip 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 5/4. 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:00 am - 4:30 am
STL
-
EZE
20h 30m
1 stop
Multiple Airlines Logo
1:10 pm - 5:33 pm
EZE
-
STL
30h 23m
2 stops
$1,112Multiple Airlines
Mon, May 4 - Mon, May 11
Air Canada Logo
1:05 pm - 2:30 pm
STL
-
EZE
47h 25m
3 stops
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
53h 50m
3 stops
$1,115Air Canada
Thu, May 7 - Thu, May 14
United Airlines Logo
2:57 pm - 8:00 am
STL
-
EZE
15h 03m
1 stop
United Airlines Logo
9:00 pm - 5:42 pm
EZE
-
STL
22h 42m
1 stop
$1,122United Airlines
Thu, May 28 - Tue, Jun 9
United Airlines Logo
1:13 pm - 8:00 am
STL
-
EZE
16h 47m
2 stops
United Airlines Logo
9:00 pm - 3:46 pm
EZE
-
STL
20h 46m
2 stops
$1,126United Airlines
Thu, May 28 - Tue, Jun 9
Air Canada Logo
1:05 pm - 2:30 pm
STL
-
EZE
23h 25m
2 stops
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
29h 50m
2 stops
$1,128Air Canada
Wed, May 6 - Wed, Jun 17
Air Canada Logo
1:05 pm - 2:30 pm
STL
-
EZE
23h 25m
3 stops
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
29h 50m
2 stops
$1,136Air Canada
Wed, May 6 - Wed, Jun 17
Multiple Airlines Logo
6:00 am - 4:30 am
STL
-
EZE
20h 30m
1 stop
Multiple Airlines Logo
11:25 pm - 2:39 pm
EZE
-
STL
41h 14m
2 stops
$1,186Multiple Airlines
Sat, May 16 - Sun, May 24
Air Canada Logo
7:05 am - 2:30 pm
STL
-
EZE
29h 25m
2 stops
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
53h 50m
3 stops
$1,200Air Canada
Wed, May 20 - Wed, May 27
Multiple Airlines Logo
6:00 am - 7:30 pm
STL
-
EZE
35h 30m
1 stop
Multiple Airlines Logo
1:35 am - 12:14 am
EZE
-
STL
24h 39m
2 stops
$1,202Multiple Airlines
Wed, May 6 - Tue, Jun 16
Air Canada Logo
2:15 pm - 2:30 pm
STL
-
EZE
22h 15m
2 stops
Air Canada Logo
4:35 pm - 8:25 pm
EZE
-
STL
29h 50m
2 stops
$1,211Air Canada
Fri, Jun 12 - Wed, Jun 17

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

Our best American Airlines deals on St. Louis to Buenos Aires Ministro Pistarini Airport flight tickets
American Airlines
May 6
STL5:24 amLambert-St Louis
23h 51m
1 stop
EZE7:15 amBuenos Aires Ministro Pistarini
Jun 17
EZE10:35 pmBuenos Aires Ministro Pistarini
14h 00m
1 stop
STL10:35 amLambert-St Louis
$1,249
American Airlines
May 22
STL5:21 amLambert-St Louis
23h 44m
1 stop
EZE7:05 amBuenos Aires Ministro Pistarini
May 30
EZE9:15 amBuenos Aires Ministro Pistarini
15h 43m
1 stop
STL10:58 pmLambert-St Louis
$1,302
American Airlines
May 22
STL12:39 pmLambert-St Louis
17h 56m
2 stops
EZE8:35 amBuenos Aires Ministro Pistarini
May 30
EZE8:35 pmBuenos Aires Ministro Pistarini
18h 40m
2 stops
STL1:15 pmLambert-St Louis
$1,306

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
May 7
STL1:05 pmLambert-St Louis
47h 25m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
May 14
EZE4:35 pmBuenos Aires Ministro Pistarini
53h 50m
3 stops
STL8:25 pmLambert-St Louis
$1,115
Air Canada
May 6
STL1:05 pmLambert-St Louis
23h 25m
2 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jun 17
EZE4:35 pmBuenos Aires Ministro Pistarini
29h 50m
2 stops
STL8:25 pmLambert-St Louis
$1,128
Air Canada
May 6
STL1:05 pmLambert-St Louis
23h 25m
3 stops
EZE2:30 pmBuenos Aires Ministro Pistarini
Jun 17
EZE4:35 pmBuenos Aires Ministro Pistarini
29h 50m
2 stops
STL8:25 pmLambert-St Louis
$1,136

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 April 11, 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

Mon 5/4

6:00 am-4:30 am

1 stop20h 30m

Buenos Aires Ministro Pistarini

Mon 5/11

1:10 pm-5:33 pm

2 stops30h 23m

$1,112

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/7

1:05 pm-2:30 pm

3 stops47h 25m

Buenos Aires Ministro Pistarini

Thu 5/14

4:35 pm-8:25 pm

3 stops53h 50m

$1,115

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/28

2:57 pm-8:00 am

1 stop15h 03m

Buenos Aires Ministro Pistarini

Tue 6/9

9:00 pm-5:42 pm

1 stop22h 42m

$1,122
Quickest round-trip

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 5/28

1:13 pm-8:00 am

2 stops16h 47m

Buenos Aires Ministro Pistarini

Tue 6/9

9:00 pm-3:46 pm

2 stops20h 46m

$1,126

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/6

1:05 pm-2:30 pm

2 stops23h 25m

Buenos Aires Ministro Pistarini

Wed 6/17

4:35 pm-8:25 pm

2 stops29h 50m

$1,128

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/6

1:05 pm-2:30 pm

3 stops23h 25m

Buenos Aires Ministro Pistarini

Wed 6/17

4:35 pm-8:25 pm

2 stops29h 50m

$1,136

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 5/16

6:00 am-4:30 am

1 stop20h 30m

Buenos Aires Ministro Pistarini

Sun 5/24

11:25 pm-2:39 pm

2 stops41h 14m

$1,186

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/20

7:05 am-2:30 pm

2 stops29h 25m

Buenos Aires Ministro Pistarini

Wed 5/27

4:35 pm-8:25 pm

3 stops53h 50m

$1,200

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/6

6:00 am-7:30 pm

1 stop35h 30m

Buenos Aires Ministro Pistarini

Tue 6/16

1:35 am-12:14 am

2 stops24h 39m

$1,202

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 6/12

2:15 pm-2:30 pm

2 stops22h 15m

Buenos Aires Ministro Pistarini

Wed 6/17

4:35 pm-8:25 pm

2 stops29h 50m

$1,211

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Buenos Aires from

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 airline that flies from Lambert-St Louis to Buenos Aires Ministro Pistarini?

Air Canada and LATAM Airlines are the most popular carriers operating from Lambert-St Louis to Buenos Aires Ministro Pistarini

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

18h 49m

Direct flights

None
The fastest flight from St. Louis to Buenos Aires Ministro Pistarini Airport takes 18h 49m
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 18h 49m.

  • 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
1,910 reviews
Search LATAM Airlines flights
DeltaPriceFrom $1,025Free CancellationRating
7.9
8,404 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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