How long is the flight from St. Louis to Buenos Aires?

Airlines like LATAM Airlines and Delta fly from St. Louis to Buenos Aires in about 19h 22m. The time it takes to get you to your destination can typically vary by up to 1h 08m. There are 5458 mi between St. Louis and Buenos Aires. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St. Louis to Buenos Aires round-trip?

Currently priced at $1,023, American Airlines will fly you from St. Louis to Buenos Aires and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $1,025 and $1,081, respectively. These flights start at 19% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Buenos Aires one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $984. However, be on the lookout for offers from American Airlines and LATAM Airlines, as they are both options that can get you from St. Louis to Buenos Aires for a low price.

In terms of precipitation, rainfall in Buenos Aires ranges from 2.0 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. June is typically the driest time to visit Buenos Aires when rainfall is around 2.0 in.

If weather is an important factor for your trip to Buenos Aires, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

What are the most popular airlines that fly from St. Louis to Buenos Aires?

Consider Delta, American Airlines or United Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Buenos Aires.

Most accurate provider : When it comes to deals on St. Louis-Buenos Aires flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Buenos Aires flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Buenos Aires flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Buenos Aires flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Buenos Aires?

Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Buenos Aires from St. Louis. Booking flights from Lambert-St Louis (STL) to Buenos Aires should be relatively easy as there are 0 daily outbound flights to Buenos Aires from 3 different airlines.

Can I find deals for flights from St. Louis to Buenos Aires that include hotel bookings?

Yes. In addition to deals on St. Louis to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Buenos Aires?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Buenos Aires.

Can I find deals for business class flights from St. Louis to Buenos Aires?

Yes. Cheapflights offers flight deals from St. Louis to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$487+ Flights from St. Louis to Buenos Aires

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheap flight deals from St. Louis to Buenos Aires

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$830 (KAYAK)
One-way from	$487 (Kiwi.com)
Popular in	November
Cheapest in	September
Average price	$1,458

Provider with most accurate pricing for Lambert-St Louis-Buenos Aires (BUE) flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Buenos Aires (BUE) flights.

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From Lambert-St Louis to Buenos Aires (BUE)

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One-way flight from Lambert-St Louis to Buenos Aires (BUE)

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($44 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

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Find flight deals from St. Louis to Buenos Aires

Cheapest flights from St. Louis to Buenos Aires
Explore the most affordable flight options available from St. Louis to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

Tue 11/185:17 pmSTL - AEP

2 stops22h 23mLATAM Airlines

Wed 11/263:40 pmAEP - STL

2 stops21h 19mLATAM Airlines

Deal found 11/6

$830

Tue 11/189:33 amSTL - EZE

1 stop20h 27mDelta

Wed 11/268:55 pmEZE - STL

1 stop20h 01mDelta

Deal found 11/5

$830

Tue 12/167:05 amSTL - EZE

1 stop21h 15mDelta

Mon 12/2211:55 pmEZE - STL

1 stop15h 26mDelta

Deal found 11/5

$1,052

Sat 12/138:00 amSTL - EZE

2 stops22h 35mLATAM Airlines

Sun 12/2111:00 amEZE - STL

2 stops15h 42mLATAM Airlines

Deal found 11/6

$1,089

Sat 12/134:45 pmSTL - EZE

1 stop35h 35mUnited Airlines

Sun 12/2110:05 pmEZE - STL

1 stop14h 44mUnited Airlines

Deal found 11/6

$1,109

Tue 12/162:02 pmSTL - EZE

2 stops16h 33mLATAM Airlines

Mon 12/2211:00 amEZE - STL

2 stops15h 42mLATAM Airlines

Deal found 11/5

$1,124

Tue 12/166:30 amSTL - EZE

2 stops21h 50mUnited Airlines

Mon 12/2210:05 pmEZE - STL

1 stop26h 50mUnited Airlines

Deal found 11/5

$1,176

Tue 11/189:33 amSTL - EZE

2 stops17h 47mLATAM Airlines

Tue 11/254:05 amEZE - STL

2 stops20h 53mLATAM Airlines

Deal found 11/6

$1,216

Sat 12/138:00 amSTL - EZE

2 stops19h 05mDelta

Sun 12/2111:55 pmEZE - STL

1 stop19h 33mDelta

Deal found 11/6

$1,228

Mon 12/810:47 amSTL - EZE

3 stops23h 03mMultiple Airlines

Fri 12/128:00 amEZE - STL

2 stops32h 50mMultiple Airlines

Deal found 11/5

$1,268

Mon 12/89:30 amSTL - AEP

2 stops21h 10mLATAM Airlines

Fri 12/122:55 pmAEP - STL

2 stops22h 29mLATAM Airlines

Deal found 11/5

$1,351

Mon 12/89:30 amSTL - EZE

2 stops17h 35mDelta

Fri 12/128:55 pmEZE - STL

1 stop16h 29mDelta

Deal found 11/5

$1,351

Best flights from St. Louis to Buenos Aires
Discover carefully curated flight deals from St. Louis to Buenos Aires that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 6, 2025.

Tue 11/189:33 amSTL - AEP

2 stops19h 22mLATAM Airlines

Wed 11/2612:40 pmAEP - STL

2 stops32h 55mLATAM Airlines

Deal found 11/5

$830

Tue 11/1810:45 amSTL - EZE

2 stops20h 30mDelta

Wed 11/2610:25 pmEZE - STL

2 stops23h 10mDelta

Deal found 11/5

$834

Mon 2/236:45 pmSTL - EZE

2 stops35h 35mUnited Airlines

Fri 3/610:05 pmEZE - STL

1 stop14h 19mUnited Airlines

Deal found 11/5

$884

Sat 1/1711:05 amSTL - EZE

2 stops18h 10mAmerican Airlines

Sun 1/2510:25 pmEZE - STL

1 stop15h 40mAmerican Airlines

Deal found 11/4

$934

Sun 3/84:00 pmSTL - AEP

2 stops16h 30mLATAM Airlines

Tue 3/175:15 pmAEP - STL

2 stops20h 35mLATAM Airlines

Deal found 11/5

$880

Sun 3/810:00 amSTL - EZE

1 stop21h 00mDelta

Tue 3/178:55 pmEZE - STL

1 stop14h 09mDelta

Deal found 11/5

$880

Fri 3/204:00 pmSTL - AEP

2 stops16h 30mLATAM Airlines

Tue 3/243:40 pmAEP - STL

2 stops22h 10mLATAM Airlines

Deal found 11/4

$880

Fri 3/2011:51 amSTL - EZE

1 stop19h 09mDelta

Tue 3/2410:25 pmEZE - STL

2 stops19h 36mDelta

Deal found 11/4

$884

Sun 3/84:00 pmSTL - EZE

2 stops19h 45mLATAM Airlines

Tue 3/177:45 amEZE - STL

2 stops17h 55mLATAM Airlines

Deal found 11/6

$880

Fri 3/137:05 pmSTL - AEP

2 stops24h 25mLATAM Airlines

Sun 3/2211:30 amAEP - STL

2 stops25h 20mLATAM Airlines

Deal found 11/5

$930

Thu 4/96:00 amSTL - EZE

2 stops25h 15mLATAM Airlines

Tue 5/127:40 amEZE - STL

2 stops17h 58mLATAM Airlines

Deal found 11/5

$1,009

Thu 4/911:51 amSTL - AEP

2 stops24h 09mLATAM Airlines

Tue 5/125:00 pmAEP - STL

2 stops19h 45mLATAM Airlines

Deal found 11/5

$1,018

Sat 1/175:00 pmSTL - AEP

2 stops20h 00mLATAM Airlines

Sun 1/258:25 pmAEP - STL

2 stops30h 14mLATAM Airlines

Deal found 11/5

$1,026

Mon 12/81:57 pmSTL - AEP

2 stops24h 03mLATAM Airlines

Fri 12/123:40 pmAEP - STL

2 stops21h 44mLATAM Airlines

Deal found 11/4

$1,351

Last-minute flights from St. Louis to Buenos Aires
Discover last-minute flight deals from St. Louis to Buenos Aires. Data last updated November 6, 2025 and is based on user searches.

Tue 11/185:17 pmSTL - AEP

2 stops22h 23mLATAM Airlines

Wed 11/263:40 pmAEP - STL

2 stops21h 19mLATAM Airlines

Deal found 11/6

$830

Tue 11/189:33 amSTL - EZE

1 stop20h 27mDelta

Wed 11/268:55 pmEZE - STL

1 stop20h 01mDelta

Deal found 11/5

$830

Tue 11/189:33 amSTL - EZE

2 stops17h 47mLATAM Airlines

Tue 11/254:05 amEZE - STL

2 stops20h 53mLATAM Airlines

Deal found 11/6

$1,216

Mon 12/810:47 amSTL - EZE

3 stops23h 03mMultiple Airlines

Fri 12/128:00 amEZE - STL

2 stops32h 50mMultiple Airlines

Deal found 11/5

$1,268

Mon 12/89:30 amSTL - AEP

3 stops23h 15mLATAM Airlines

Fri 12/122:55 pmAEP - STL

2 stops22h 29mLATAM Airlines

Deal found 11/4

$1,351

Mon 12/89:30 amSTL - EZE

2 stops17h 35mDelta

Fri 12/128:55 pmEZE - STL

1 stop16h 29mDelta

Deal found 11/5

$1,351

Sat 12/138:00 amSTL - EZE

2 stops22h 35mLATAM Airlines

Sun 12/2111:00 amEZE - STL

2 stops15h 42mLATAM Airlines

Deal found 11/6

$1,089

Sat 12/134:45 pmSTL - EZE

1 stop35h 35mUnited Airlines

Sun 12/2110:05 pmEZE - STL

1 stop14h 44mUnited Airlines

Deal found 11/6

$1,109

Sat 12/138:00 amSTL - EZE

2 stops19h 05mDelta

Sun 12/2111:55 pmEZE - STL

1 stop19h 33mDelta

Deal found 11/6

$1,228

Tue 12/167:05 amSTL - EZE

1 stop21h 15mDelta

Mon 12/2211:55 pmEZE - STL

1 stop15h 26mDelta

Deal found 11/5

$1,052

Tue 12/162:02 pmSTL - EZE

2 stops16h 33mLATAM Airlines

Mon 12/2211:00 amEZE - STL

2 stops15h 42mLATAM Airlines

Deal found 11/5

$1,124

Tue 12/166:30 amSTL - EZE

2 stops21h 50mUnited Airlines

Mon 12/2210:05 pmEZE - STL

1 stop26h 50mUnited Airlines

Deal found 11/5

$1,176

One-way flights from St. Louis to Buenos Aires
Search for one-way flight options from St. Louis to Buenos Aires. Find affordable one-way fares based on user searches. Data last updated November 6, 2025.

Fri 12/123:30 pmSTL - AEP

3 stops48h 10mMultiple Airlines

Deal found 11/4

$487

Fri 12/123:30 pmSTL - EZE

3 stops34h 40mMultiple Airlines

Deal found 11/4

$491

Fri 12/121:57 pmSTL - EZE

1 stop14h 23mDelta

Deal found 11/4

$984

Sun 11/3011:39 amSTL - EZE

1 stop16h 41mDelta

Deal found 11/6

$1,799

Sun 11/309:36 amSTL - EZE

2 stops21h 39mAmerican Airlines

Deal found 11/6

$2,234

Sun 11/301:55 pmSTL - AEP

2 stops23h 05mLATAM Airlines

Deal found 11/6

$2,581

Sun 11/306:30 amSTL - EZE

3 stops29h 40mAir Canada

Deal found 11/6

$3,974

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Tue 11/18

9:33 am-7:55 am

2 stops19h 22m

Buenos Aires Jorge Newbery

Wed 11/26

12:40 pm-6:35 pm

2 stops32h 55m

$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 - AEP

STLAEP

Lambert-St Louis

Sun 3/8

4:00 pm-10:30 am

2 stops16h 30m

Buenos Aires Jorge Newbery

Tue 3/17

5:15 pm-11:50 am

2 stops20h 35m

$880

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

10:00 am-9:00 am

1 stop21h 00m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-9:04 am

1 stop14h 09m

$880

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 3/20

4:00 pm-10:30 am

2 stops16h 30m

Buenos Aires Jorge Newbery

Tue 3/24

3:40 pm-11:50 am

2 stops22h 10m

$880

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 3/8

4:00 pm-1:45 pm

2 stops19h 45m

Buenos Aires Ministro Pistarini

Tue 3/17

7:45 am-11:40 pm

2 stops17h 55m

$880

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 2/23

6:45 pm-9:20 am

2 stops35h 35m

Buenos Aires Ministro Pistarini

Fri 3/6

10:05 pm-9:24 am

1 stop14h 19m

$884

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 3/20

11:51 am-9:00 am

1 stop19h 09m

Buenos Aires Ministro Pistarini

Tue 3/24

10:25 pm-4:01 pm

2 stops19h 36m

$884

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Fri 3/13

7:05 pm-9:30 pm

2 stops24h 25m

Buenos Aires Jorge Newbery

Sun 3/22

11:30 am-10:50 am

2 stops25h 20m

$930

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sat 1/17

11:05 am-8:15 am

2 stops18h 10m

Buenos Aires Ministro Pistarini

Sun 1/25

10:25 pm-11:05 am

1 stop15h 40m

$934

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 21 results

Compare providers for flights from St. Louis to Buenos Aires

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Buenos Aires in November.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Buenos Aires flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Buenos Aires flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Buenos Aires flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Buenos Aires flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Buenos Aires

What is the cheapest time of day to fly from STL to BUE?

Unlike in the morning, when flights are generally more expensive, you can save up to 8% on flights from St. Louis to Buenos Aires by exploring options for tickets at noon.

Reviews of airlines servicing Buenos Aires

Get a feel of what it's like to fly with Delta, LATAM Airlines, and United Airlines from St. Louis to Buenos Aires by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,001 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Delta

7.9

Good

8,001 reviews

Delta

7.9

Good

8,001 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

LATAM Airlines

7.5

Good

1,872 reviews

Delta

7.9

Good

8,001 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,007 reviews

Delta

7.9

Good

8,001 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,040 reviews

Delta

7.9

Good

8,001 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

What airport do you fly from for flights from St. Louis to Buenos Aires?
Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Buenos Aires from St. Louis. Booking flights from Lambert-St Louis (STL) to Buenos Aires should be relatively easy as there are 0 daily outbound flights to Buenos Aires from 3 different airlines.
How long is the flight from St. Louis to Buenos Aires?
Airlines like LATAM Airlines and Delta fly from St. Louis to Buenos Aires in about 19h 22m. The time it takes to get you to your destination can typically vary by up to 1h 08m. There are 5458 mi between St. Louis and Buenos Aires. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from St. Louis to Buenos Aires round-trip?
Currently priced at $1,023, American Airlines will fly you from St. Louis to Buenos Aires and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $1,025 and $1,081, respectively. These flights start at 19% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from St. Louis to Buenos Aires one-way?
The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $984. However, be on the lookout for offers from American Airlines and LATAM Airlines, as they are both options that can get you from St. Louis to Buenos Aires for a low price.
Can I find deals for flights from St. Louis to Buenos Aires that include hotel bookings?
Yes. In addition to deals on St. Louis to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Buenos Aires?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Buenos Aires.
Can I find deals for business class flights from St. Louis to Buenos Aires?
Yes. Cheapflights offers flight deals from St. Louis to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from St. Louis to Buenos Aires

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$1,023	Average$1,287	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$1,025	Average$1,291	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$1,081	Average$1,406	FlexibilityNo cancel fee	On-time69%

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$487+ Cheap flights from St. Louis (STL) to Buenos Aires (BUE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Buenos Aires with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Buenos Aires

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Most trusted provider

Round-trip from

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Popular in

Cheapest in

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Find flight deals from St. Louis to Buenos Aires

Cheapest flights from St. Louis to Buenos AiresExplore the most affordable flight options available from St. Louis to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

Explore the most affordable flight options available from St. Louis to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Buenos Aires that are best for you.

Compare providers for flights from St. Louis to Buenos Aires

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Buenos Aires in November.

Best time to book a flight from St. Louis to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Buenos Aires

What is the cheapest time of day to fly from STL to BUE?

Find hourly flight availability from St. Louis to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

Reviews of airlines servicing Buenos Aires

Get a feel of what it's like to fly with Delta, LATAM Airlines, and United Airlines from St. Louis to Buenos Aires by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Buenos Aires?

How long is the flight from St. Louis to Buenos Aires?

What are the cheapest airlines flying from St. Louis to Buenos Aires round-trip?

What are the cheapest airlines to fly from St. Louis to Buenos Aires one-way?

Can I find deals for flights from St. Louis to Buenos Aires that include hotel bookings?

How can I find direct flights from St. Louis to Buenos Aires?

Can I find deals for business class flights from St. Louis to Buenos Aires?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from St. Louis to Buenos Aires

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Cheapest flights from St. Louis to Buenos Aires
Explore the most affordable flight options available from St. Louis to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.