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

Currently priced at $1,025, Delta will fly you from St. Louis to Buenos Aires and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from LATAM Airlines and United Airlines - these airlines can fly you to your destination from $1,130 and $1,175, respectively. These flights start at 18% 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 $718. However, be on the lookout for offers from LATAM Airlines and Air Canada, as they are both options that can get you from St. Louis to Buenos Aires for a low price.

What is the cheapest day to fly from St. Louis to Buenos Aires?

Travelers seeking maximum savings on their St. Louis to Buenos Aires flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

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

What is the cheapest day to fly round-trip from St. Louis to Buenos Aires?

Thursday flights are generally found to be more expensive for flights from St. Louis to Buenos Aires. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Buenos Aires.

What is the cheapest month to fly from St. Louis to Buenos Aires?

August is one of the best times of the year to fly to Buenos Aires from St. Louis. Prices for August average $1,258 per person but you can even find prices for as low as $999. The most expensive prices can be found in the month of February. Opting for a August flight can save you 11% on your journey compared to booking in February

Most accurate provider : When it comes to deals on St. Louis-Buenos Aires flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Buenos Aires flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

$614+ Save on Flights from St. Louis to Buenos Aires

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Cheap flight deals from St. Louis to Buenos Aires

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$1,025 (Delta)
One-way from	$614 (Kiwi.com)
Popular in	February
Cheapest in	August
Average price	$1,408

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

Search Deals

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)

Search Deals

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

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($82 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 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 February 20, 2025.

Tue 11/183:30 pmSTL - EZE

1 stop14h 30mDelta

Wed 11/267:35 pmEZE - STL

2 stops19h 49mDelta

Deal found 2/19

$1,025

Tue 11/1810:30 amSTL - EZE

2 stops19h 50mUnited Airlines

Wed 11/2610:05 pmEZE - STL

2 stops22h 09mUnited Airlines

Deal found 2/18

$1,030

Thu 9/43:30 pmSTL - AEP

2 stops18h 30mLATAM Airlines

Fri 9/1210:50 pmAEP - STL

2 stops23h 57mLATAM Airlines

Deal found 2/18

$1,065

Sun 10/125:40 pmSTL - EZE

2 stops34h 15mMultiple Airlines

Tue 10/217:35 amEZE - STL

3 stops40h 31mMultiple Airlines

Deal found 2/19

$1,081

Sun 4/207:01 pmSTL - EZE

2 stops53h 29mLATAM Airlines

Mon 4/285:35 amEZE - STL

2 stops32h 10mLATAM Airlines

Deal found 2/18

$1,130

Sun 10/125:34 amSTL - EZE

1 stop25h 26mAmerican Airlines

Tue 10/2110:00 pmEZE - STL

2 stops18h 08mAmerican Airlines

Deal found 2/19

$1,161

Tue 11/184:15 pmSTL - EZE

2 stops20h 10mAir Canada

Wed 11/265:00 pmEZE - STL

3 stops24h 18mAir Canada

Deal found 2/19

$1,372

Mon 3/174:42 pmSTL - EZE

2 stops17h 38mGOL

Mon 3/313:40 amEZE - STL

2 stops22h 16mGOL

Deal found 2/19

$1,594

Mon 3/248:25 amSTL - EZE

2 stops35h 46mCopa Airlines

Fri 3/2812:22 amEZE - STL

2 stops21h 28mCopa Airlines

Deal found 2/20

$1,760

Sun 2/234:00 pmSTL - AEP

3 stops34h 40mMultiple Airlines

Tue 2/254:30 pmAEP - STL

3 stops46h 15mMultiple Airlines

Deal found 2/19

$1,812

Fri 4/188:25 amSTL - EZE

2 stops37h 45mAvianca

Sun 4/271:40 amEZE - STL

2 stops34h 18mAvianca

Deal found 2/18

$6,156

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 February 20, 2025.

Mon 4/2110:42 amSTL - EZE

2 stops41h 28mDelta

Mon 4/288:10 pmEZE - STL

1 stop17h 35mDelta

Deal found 2/18

$1,025

Sun 4/207:01 pmSTL - EZE

2 stops53h 29mLATAM Airlines

Mon 4/285:35 amEZE - STL

2 stops32h 10mLATAM Airlines

Deal found 2/18

$1,130

Tue 3/188:40 amSTL - EZE

1 stop21h 40mUnited Airlines

Tue 3/259:05 pmEZE - STL

1 stop14h 46mUnited Airlines

Deal found 2/18

$1,175

Tue 5/69:40 amSTL - EZE

2 stops36h 30mMultiple Airlines

Sat 5/104:35 pmEZE - STL

3 stops53h 26mMultiple Airlines

Deal found 2/19

$1,336

Tue 5/61:38 pmSTL - EZE

2 stops18h 37mAmerican Airlines

Sat 5/108:30 pmEZE - STL

1 stop27h 50mAmerican Airlines

Deal found 2/19

$1,364

Fri 4/183:30 pmSTL - EZE

2 stops21h 00mAir Canada

Mon 4/284:35 pmEZE - STL

3 stops53h 26mAir Canada

Deal found 2/19

$1,423

Mon 3/174:42 pmSTL - EZE

2 stops17h 38mGOL

Mon 3/313:40 amEZE - STL

2 stops22h 16mGOL

Deal found 2/19

$1,594

Mon 3/248:25 amSTL - EZE

2 stops35h 46mCopa Airlines

Fri 3/2812:22 amEZE - STL

2 stops21h 28mCopa Airlines

Deal found 2/20

$1,760

Sat 4/194:15 pmSTL - AEP

2 stops48h 20mLATAM Airlines

Mon 4/288:40 amAEP - STL

2 stops26h 56mLATAM Airlines

Deal found 2/18

$1,146

Tue 5/65:32 pmSTL - AEP

2 stops20h 28mMultiple Airlines

Fri 5/93:40 amAEP - STL

2 stops20h 40mMultiple Airlines

Deal found 2/19

$1,887

Fri 4/188:25 amSTL - EZE

2 stops37h 45mAvianca

Sun 4/271:40 amEZE - STL

2 stops34h 18mAvianca

Deal found 2/18

$6,156

Last-minute flights from St. Louis to Buenos Aires
Discover last-minute flight deals from St. Louis to Buenos Aires. Data last updated February 20, 2025 and is based on user searches.

Sun 2/233:50 pmSTL - EZE

2 stops20h 35mMultiple Airlines

Tue 2/257:10 amEZE - STL

2 stops53h 55mMultiple Airlines

Deal found 2/19

$1,461

Sun 2/234:00 pmSTL - AEP

3 stops34h 40mMultiple Airlines

Tue 2/254:30 pmAEP - STL

3 stops46h 15mMultiple Airlines

Deal found 2/19

$1,812

Sun 2/237:04 amSTL - EZE

1 stop24h 25mAmerican Airlines

Tue 2/2510:30 pmEZE - STL

1 stop21h 03mAmerican Airlines

Deal found 2/19

$2,055

Mon 3/171:06 pmSTL - AEP

2 stops24h 54mLATAM Airlines

Tue 4/110:35 amAEP - STL

2 stops27h 25mLATAM Airlines

Deal found 2/19

$1,195

Mon 3/1710:19 amSTL - EZE

2 stops17h 41mLATAM Airlines

Tue 4/17:35 amEZE - STL

2 stops17h 56mLATAM Airlines

Deal found 2/19

$1,195

Mon 3/174:42 pmSTL - EZE

2 stops17h 38mGOL

Mon 3/313:40 amEZE - STL

2 stops22h 16mGOL

Deal found 2/19

$1,594

Tue 3/188:40 amSTL - EZE

1 stop21h 40mUnited Airlines

Tue 3/259:05 pmEZE - STL

1 stop14h 46mUnited Airlines

Deal found 2/18

$1,175

Tue 3/1810:19 amSTL - EZE

2 stops21h 26mDelta

Tue 3/258:55 pmEZE - STL

1 stop17h 05mDelta

Deal found 2/18

$1,180

Tue 3/183:50 pmSTL - EZE

2 stops20h 35mAir Canada

Tue 3/254:00 pmEZE - STL

3 stops31h 49mAir Canada

Deal found 2/18

$1,437

Mon 3/248:25 amSTL - EZE

2 stops35h 46mCopa Airlines

Fri 3/2812:22 amEZE - STL

2 stops21h 28mCopa Airlines

Deal found 2/20

$1,760

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 February 20, 2025.

Tue 7/156:10 amSTL - EZE

3 stops43h 30mMultiple Airlines

Deal found 2/20

$614

Wed 7/97:20 amSTL - EZE

2 stops20h 35mDelta

Deal found 2/20

$718

Sat 7/123:30 pmSTL - AEP

2 stops21h 10mLATAM Airlines

Deal found 2/20

$791

Wed 7/98:10 amSTL - EZE

3 stops28h 20mAir Canada

Deal found 2/20

$951

Find flights from St. Louis to Buenos Aires within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 4/21

10:42 am-6:10 am

2 stops41h 28m

Buenos Aires Ministro Pistarini

Mon 4/28

8:10 pm-11:45 am

1 stop17h 35m

$1,025

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Sun 4/20

7:01 pm-2:30 am

2 stops53h 29m

Buenos Aires Ministro Pistarini

Mon 4/28

5:35 am-11:45 am

2 stops32h 10m

$1,130

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Sat 4/19

4:15 pm-6:35 pm

2 stops48h 20m

Buenos Aires Jorge Newbery

Mon 4/28

8:40 am-9:36 am

2 stops26h 56m

$1,146

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 3/18

8:40 am-8:20 am

1 stop21h 40m

Buenos Aires Ministro Pistarini

Tue 3/25

9:05 pm-9:51 am

1 stop14h 46m

$1,175

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 5/6

9:40 am-12:10 am

2 stops36h 30m

Buenos Aires Ministro Pistarini

Sat 5/10

4:35 pm-8:01 pm

3 stops53h 26m

$1,336

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 5/6

1:38 pm-10:15 am

2 stops18h 37m

Buenos Aires Ministro Pistarini

Sat 5/10

8:30 pm-10:20 pm

1 stop27h 50m

$1,364

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Fri 4/18

3:30 pm-2:30 pm

2 stops21h 00m

Buenos Aires Ministro Pistarini

Mon 4/28

4:35 pm-8:01 pm

3 stops53h 26m

$1,423

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 3/17

4:42 pm-12:20 pm

2 stops17h 38m

Buenos Aires Ministro Pistarini

Mon 3/31

3:40 am-11:56 pm

2 stops22h 16m

$1,594

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Mon 3/24

8:25 am-10:11 pm

2 stops35h 46m

Buenos Aires Ministro Pistarini

Fri 3/28

12:22 am-7:50 pm

2 stops21h 28m

$1,760

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Tue 5/6

5:32 pm-4:00 pm

2 stops20h 28m

Buenos Aires Jorge Newbery

Fri 5/9

3:40 am-10:20 pm

2 stops20h 40m

$1,887

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 15 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 February.

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

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Buenos Aires flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Travel insights for flights from St. Louis to Buenos Aires

Get recent, data-driven insights about flights from St. Louis to Buenos Aires including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Buenos Aires?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Buenos Aires (average of $795). Flying from St. Louis to Buenos Aires in December is currently the most expensive (average of $1,260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 16% on flights from St. Louis to Buenos Aires by exploring options for tickets in the evening.

Rainfall in Buenos Aires by month

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.

Temperature in Buenos Aires by month

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).

Reviews of airlines servicing Buenos Aires

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

8,220 reviews

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Copa Airlines

7.6

Good

1,510 reviews

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

LATAM Airlines

7.5

Good

1,795 reviews

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,766 reviews

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

GOL

7.3

Good

1,066 reviews

Delta

8.0

Very good

8,220 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.
What are the cheapest airlines flying from St. Louis to Buenos Aires round-trip?
Currently priced at $1,025, Delta will fly you from St. Louis to Buenos Aires and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from LATAM Airlines and United Airlines - these airlines can fly you to your destination from $1,130 and $1,175, respectively. These flights start at 18% 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 $718. However, be on the lookout for offers from LATAM Airlines and Air Canada, 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.
What is the cheapest month to book a flight from St. Louis to Buenos Aires?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Buenos Aires (average of $795). Flying from St. Louis to Buenos Aires in December is currently the most expensive (average of $1,260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
United Airlines	Cheapest$814	Average$1,203	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$999	Average$1,262	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$1,023	Average$1,243	FlexibilityNo cancel fee	On-timeN/A

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$614+ 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 7/15. 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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Cheap flight deals from St. Louis to Buenos Aires

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Round-trip from

One-way from

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 February 20, 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 February 20, 2025.

Find flights from St. Louis to Buenos Aires within your budget

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 February.

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.

Travel insights for flights from St. Louis to Buenos Aires

Get recent, data-driven insights about flights from St. Louis to Buenos Aires including ideal travel times, pricing trends, and more.

What is the cheapest month to book a 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 February 20, 2025.

Rainfall in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average rainfall totals by month.

Temperature in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average temperature totals by month.

Reviews of airlines servicing Buenos Aires

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?

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?

What is the cheapest month to book a flight 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 February 20, 2025.