What is the cheapest airline that flies from Lambert-St Louis to Buenos Aires?

GOL and Copa Airlines are the most popular carriers operating from Lambert-St Louis to Buenos Aires

Which layover airport has the shortest travel time from St. Louis to Buenos Aires?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 13h 31m.

Which layover airport offers the lowest fares from St. Louis to Buenos Aires?

Flights via Dallas (DFW) offer the lowest average round-trip price of $1,237.

Which layover airport has the shortest connection time from St. Louis to Buenos Aires?

Dallas (DFW) has the shortest average layover time for this route: 1h 45m.

What airlines fly to Buenos Aires?

Delta, LATAM Airlines and American Airlines are the top three most popular airlines that fly to Buenos Aires from St. Louis according to our data. Delta is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Buenos Aires. Keep in mind that there are 3 different airlines that fly to Buenos Aires on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between St. Louis and Buenos Aires?

Atlanta (ATL) was the most common stop: 73% of momondo users choosing 1-stop flights on this route connected there.

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

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

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

As of September 2026, there are 3 operators available to choose from for flights from Lambert-St Louis Airport to Buenos Aires.

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

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 Lambert-St Louis Airport to Buenos Aires.

What documentation or ID do you need to fly to Buenos Aires?

The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$482 Cheap Flights from St. Louis to Buenos Aires in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Buenos Aires

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 7:35 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

22h 35m1 stop Atlanta Hartsfield-Jackson

11:35 pm - 10:48 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 13m1 stop Atlanta Hartsfield-Jackson

$1,133LATAM Airlines

Thu, Jan 21 - Tue, Feb 2

5:48 pm - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

12h 52m1 stop Atlanta Hartsfield-Jackson

9:30 pm - 4:23 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 53m1 stop Atlanta Hartsfield-Jackson

$1,133LATAM Airlines

Wed, Nov 11 - Wed, Nov 18

9:00 am - 3:00 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

39h 00m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

11:35 pm - 6:01 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 26m1 stop Atlanta Hartsfield-Jackson

$1,138LATAM Airlines

Thu, Jan 21 - Tue, Feb 2

6:30 am - 2:35 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

18h 05m1 stop Cancun

1:10 pm - 5:40 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

30h 30m2 stops Miami Atlanta Hartsfield-Jackson

$1,143Multiple Airlines

Wed, Oct 14 - Thu, Oct 22

9:00 am - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

21h 40m1 stop Atlanta Hartsfield-Jackson

11:35 pm - 2:43 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

17h 08m1 stop Atlanta Hartsfield-Jackson

$1,148Delta

Tue, Feb 23 - Wed, Mar 17

3:40 pm - 9:40 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

15h 00m1 stop Atlanta Hartsfield-Jackson

4:00 am - 11:39 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 39m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,148Delta

Mon, Feb 22 - Mon, Mar 15

6:15 am - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

24h 05m1 stop Houston George Bush Intcntl

10:05 pm - 9:42 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 37m1 stop Houston George Bush Intcntl

$1,148United Airlines

Tue, Feb 23 - Thu, Mar 11

1:08 pm - 9:20 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

17h 12m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

10:05 pm - 4:44 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 39m1 stop Houston George Bush Intcntl

$1,148United Airlines

Tue, Feb 23 - Thu, Mar 11

5:00 pm - 10:15 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

14h 15m1 stop Miami

11:35 pm - 11:33 amEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

14h 58m1 stop Miami

$1,666American Airlines

Wed, Dec 16 - Wed, Dec 30

5:03 am - 7:25 amSTL Lambert-St Louis-EZE Buenos Aires Ministro Pistarini

23h 22m1 stop Miami

10:50 pm - 5:24 pmEZE Buenos Aires Ministro Pistarini-STL Lambert-St Louis

21h 34m1 stop Miami

$1,828American Airlines

Mon, Dec 21 - Wed, Jan 6

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Delta flights from St. Louis to Buenos Aires

Our best Delta deals on St. Louis to Buenos Aires flight tickets

Delta

Feb 18

STL9:00 amLambert-St Louis

21h 40m

1 stop

EZE9:40 amBuenos Aires Ministro Pistarini

Mar 16

EZE9:30 pmBuenos Aires Ministro Pistarini

15h 18m

1 stop

STL10:48 amLambert-St Louis

$1,148

Delta

Feb 21

STL6:59 pmLambert-St Louis

35h 41m

1 stop

EZE9:40 amBuenos Aires Ministro Pistarini

Mar 15

EZE11:35 pmBuenos Aires Ministro Pistarini

20h 26m

1 stop

STL6:01 pmLambert-St Louis

$1,156

Delta

Oct 13

STL7:20 pmLambert-St Louis

12h 25m

1 stop

EZE9:45 amBuenos Aires Ministro Pistarini

Oct 21

EZE4:45 pmBuenos Aires Ministro Pistarini

22h 35m

2 stops

STL1:20 pmLambert-St Louis

$1,178

United Airlines flights from St. Louis to Buenos Aires

Our best United Airlines deals on St. Louis to Buenos Aires flight tickets

United Airlines

Oct 14

STL5:36 pmLambert-St Louis

36h 24m

2 stops

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 21

EZE9:00 pmBuenos Aires Ministro Pistarini

19h 10m

1 stop

STL2:10 pmLambert-St Louis

$1,167

United Airlines

Oct 14

STL3:12 pmLambert-St Louis

14h 48m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 21

EZE9:00 pmBuenos Aires Ministro Pistarini

19h 10m

1 stop

STL2:10 pmLambert-St Louis

$1,203

United Airlines

Oct 14

STL3:12 pmLambert-St Louis

14h 48m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 21

EZE9:00 pmBuenos Aires Ministro Pistarini

15h 10m

1 stop

STL10:10 amLambert-St Louis

$1,226

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 1/21

6:00 am-7:35 am

1 stop22h 35m

Buenos Aires Ministro Pistarini

Tue 2/2

11:35 pm-10:48 am

1 stop14h 13m

$1,133

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 11/11

5:48 pm-9:40 am

1 stop12h 52m

Buenos Aires Ministro Pistarini

Wed 11/18

9:30 pm-4:23 pm

1 stop21h 53m

$1,133

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Thu 1/21

9:00 am-3:00 am

2 stops39h 00m

Buenos Aires Ministro Pistarini

Tue 2/2

11:35 pm-6:01 pm

1 stop21h 26m

$1,138

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 10/14

6:30 am-2:35 am

1 stop18h 05m

Buenos Aires Ministro Pistarini

Thu 10/22

1:10 pm-5:40 pm

2 stops30h 30m

$1,143

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 2/23

9:00 am-9:40 am

1 stop21h 40m

Buenos Aires Ministro Pistarini

Wed 3/17

11:35 pm-2:43 pm

1 stop17h 08m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 2/22

3:40 pm-9:40 am

1 stop15h 00m

Buenos Aires Ministro Pistarini

Mon 3/15

4:00 am-11:39 pm

2 stops21h 39m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 2/23

6:15 am-9:20 am

1 stop24h 05m

Buenos Aires Ministro Pistarini

Thu 3/11

10:05 pm-9:42 am

1 stop14h 37m

$1,148

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Tue 2/23

1:08 pm-9:20 am

2 stops17h 12m

Buenos Aires Ministro Pistarini

Thu 3/11

10:05 pm-4:44 pm

1 stop21h 39m

$1,148

Quickest round-trip

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Wed 12/16

5:00 pm-10:15 am

1 stop14h 15m

Buenos Aires Ministro Pistarini

Wed 12/30

11:35 pm-11:33 am

1 stop14h 58m

$1,666

St. LouisBuenos Aires

STL Lambert-St Louis - EZE Buenos Aires Ministro Pistarini

STLEZE

Lambert-St Louis

Mon 12/21

5:03 am-7:25 am

1 stop23h 22m

Buenos Aires Ministro Pistarini

Wed 1/6

10:50 pm-5:24 pm

1 stop21h 34m

$1,828

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Buenos Aires

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

Prices

Airlines

Layovers

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from St. Louis is in September. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from St. Louis during November instead. Flights to Buenos Aires in November, while not as cheap as those in September, still average around $1,065.

When to book flights from St. Louis to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Buenos Aires 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 (STL to BUE) flight deals and tips

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

Best Price Found	$482
Fastest flight time	16h 06m
Direct flights	None

The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $482. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,133.

The fastest flight from St. Louis to Buenos Aires takes 16h 06m

There are no direct flights from St. Louis to Buenos Aires. There are no popular flight routes from St. Louis to Buenos Aires.

Search flight deals

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

How far is Lambert-St Louis to Buenos Aires by plane?
The straight-line distance from Lambert-St Louis to Buenos Aires is 5450.9 mi. Typically, this will take 16h 06m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Buenos Aires?
Prices for flights from Lambert-St Louis Airport to Buenos Aires are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Buenos Aires?
As of September 2026, there are 3 operators available to choose from for flights from Lambert-St Louis Airport to Buenos Aires.
How old do you have to be to fly from Lambert-St Louis Airport to Buenos Aires?
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 Lambert-St Louis Airport to Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Buenos Aires?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Buenos Aires is Delta (54% of total bookings). The next most popular airlines are LATAM Airlines (30%) and American Airlines (16%).

Best airlines flying from St. Louis to Buenos Aires

Compare and see reviews for airlines that fly from St. Louis to Buenos Aires with momondo

Airline	Rating	Free Cancellation	Price
LATAM Airlines	PriceFrom $884	Free Cancellation	Rating 7.4 1,987 reviews	Search LATAM Airlines flights
Delta	PriceFrom $1,025	Free Cancellation	Rating 7.8 8,536 reviews	Search Delta flights
American Airlines	PriceFrom $1,147	Free Cancellation	Rating 7.1 12,028 reviews	Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Buenos Aires from St. Louis.

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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Cheap flights from St. Louis to Buenos Aires from $482

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 12/6. 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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Delta flights from St. Louis to Buenos Aires

Our best Delta deals on St. Louis to Buenos Aires flight tickets

United Airlines flights from St. Louis to Buenos Aires

Our best United Airlines deals on St. Louis to Buenos Aires flight tickets

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How to get the cheapest flight ticket from St. Louis to Buenos Aires

What is the cheapest month to fly to Buenos Aires?

What is the cheapest airline that flies from Lambert-St Louis to Buenos Aires?

What airlines fly to Buenos Aires?

Which airport is the most popular layover for flights between St. Louis and Buenos Aires?

Which layover airport offers the lowest fares from St. Louis to Buenos Aires?

Which layover airport has the shortest travel time from St. Louis to Buenos Aires?

Which layover airport has the shortest connection time from St. Louis to Buenos Aires?

When to book flights from St. Louis to Buenos Aires

Cheap St. Louis to Buenos Aires (STL to BUE) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

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

Best airlines flying from St. Louis to Buenos Aires

Compare and see reviews for airlines that fly from St. Louis to Buenos Aires with momondo

Why use momondo?

An easier way to manage your Buenos Aires 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires

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List of cabin classes available on flights landing in Buenos Aires. Availability may vary depending on flight origin and airline.

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