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Cheap flights from St. Louis (STL) to Buenos Aires (BUE) from $333

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — BUE
May 16 — May 231
From?
To?
Thu 5/16
Thu 5/23
1 adult, Economy
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The best prices from Lambert-St Louis to Buenos Aires are usually found in October or June, booked 76 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

Cheap flight deals from St. Louis to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Buenos Aires (BUE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 11, 2024.

Popular in

December

Cheapest in

October

Round-trip from

$795

One-way from

$640
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 26% potential price drop
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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)
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What is the cheapest day to fly round-trip from St. Louis to Buenos Aires?

Sunday 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.

How far in advance should I book a flight from St. Louis to Buenos Aires?

To save up to 43% on this flight, we recommend booking at least 55 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to Buenos Aires from $1,238 1-2 weeks out and tickets from $1,481 for flights departing within the next 72 hours.

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

October is one of the best times of the year to fly to Buenos Aires from St. Louis. Prices for October average $1,219 per person but you can even find prices for as low as $837. The most expensive prices can be found in the month of December. Opting for a October flight can save you 38% on your journey compared to booking in December

When is the cheapest time to fly from St. Louis to Buenos Aires (STL - BUE)?

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from St. Louis to Buenos Aires by exploring options for tickets in the afternoon.

Cheap Delta flights from St. Louis to Buenos Aires

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Buenos Aires. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.
Peruse some of the lowest-priced Delta flights we've found from St. Louis to Buenos Aires. It's recommended that users confirm their flight details before booking.
Mon 8/1910:00 amSTL - EZE
2 stops18h 15mDelta
Mon 8/268:00 pmEZE - STL
1 stop21h 57mDelta
Deal found 5/10$1,000
Sat 9/76:00 amSTL - EZE
2 stops22h 15mDelta
Tue 9/108:00 pmEZE - STL
1 stop16h 43mDelta
Deal found 5/9$1,040
Thu 7/117:15 amSTL - EZE
2 stops21h 00mDelta
Fri 7/266:10 amEZE - STL
2 stops28h 56mDelta
Deal found 5/10$1,045
Sun 8/47:06 pmSTL - EZE
1 stop12h 34mDelta
Sun 8/118:00 pmEZE - STL
1 stop18h 58mDelta
Deal found 5/10$1,080
Wed 7/3110:11 amSTL - EZE
2 stops18h 04mDelta
Tue 10/88:00 pmEZE - STL
1 stop18h 54mDelta
Deal found 5/10$1,137
Thu 10/107:15 pmSTL - EZE
1 stop12h 20mDelta
Fri 10/258:00 pmEZE - STL
1 stop18h 54mDelta
Deal found 5/10$1,274
Fri 8/2310:00 amSTL - AEP
2 stops28h 20mDelta
Tue 8/276:20 amAEP - STL
2 stops19h 19mDelta
Deal found 5/10$1,457
Sun 6/97:06 pmSTL - EZE
1 stop12h 39mDelta
Mon 6/178:00 pmEZE - STL
1 stop20h 57mDelta
Deal found 5/10$3,304
Sun 6/97:06 pmSTL - EZE
1 stop12h 39mDelta
Mon 6/176:10 amEZE - STL
2 stops17h 03mDelta
Deal found 5/10$3,574

Cheap American Airlines flights from St. Louis to Buenos Aires

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Buenos Aires. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.
Browse through some of the cheapest American Airlines flights traveling from St. Louis to Buenos Aires. Check back soon if you're not seeing flights that suit your needs.
Mon 8/199:06 amSTL - EZE
2 stops19h 59mAmerican Airlines
Mon 8/2610:20 pmEZE - STL
2 stops23h 00mAmerican Airlines
Deal found 5/10$1,001
Thu 8/812:48 pmSTL - EZE
2 stops19h 12mAmerican Airlines
Sun 8/1810:20 pmEZE - STL
2 stops23h 00mAmerican Airlines
Deal found 5/10$1,081
Wed 6/193:27 pmSTL - EZE
2 stops17h 23mAmerican Airlines
Wed 6/268:55 pmEZE - STL
1 stop28h 31mAmerican Airlines
Deal found 5/10$1,154
Wed 6/195:00 amSTL - EZE
1 stop26h 10mAmerican Airlines
Wed 6/268:55 pmEZE - STL
1 stop28h 31mAmerican Airlines
Deal found 5/10$1,163

Cheap St. Louis to Buenos Aires flights in May & June 2024

Find cheap flight options from St. Louis to Buenos Aires specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,684,066 searches. Prices were last updated on May 11, 2024.
These are some of the best deals we've found on flights to Buenos Aires in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Wed 6/193:27 pmSTL - EZE
2 stops17h 23mAmerican Airlines
Wed 6/268:55 pmEZE - STL
1 stop28h 31mAmerican Airlines
Deal found 5/10$1,154
Wed 6/195:00 amSTL - EZE
1 stop26h 10mAmerican Airlines
Wed 6/268:55 pmEZE - STL
1 stop28h 31mAmerican Airlines
Deal found 5/10$1,163
Wed 5/2912:53 pmSTL - AEP
2 stops25h 07mLATAM Airlines
Mon 6/175:10 pmAEP - STL
2 stops20h 51mLATAM Airlines
Deal found 5/10$1,164
Wed 5/2911:15 amSTL - EZE
1 stop18h 45mUnited Airlines
Mon 6/179:00 pmEZE - STL
1 stop21h 25mUnited Airlines
Deal found 5/10$1,164
Wed 5/292:00 pmSTL - EZE
2 stops18h 00mAmerican Airlines
Mon 6/1710:25 pmEZE - STL
2 stops20h 53mAmerican Airlines
Deal found 5/11$1,167
Wed 5/2911:15 amSTL - EZE
1 stop18h 45mUnited Airlines
Mon 6/179:00 pmEZE - STL
2 stops20h 41mUnited Airlines
Deal found 5/11$1,168
Wed 6/1910:15 amSTL - AEP
2 stops27h 45mLATAM Airlines
Wed 6/265:10 pmAEP - STL
2 stops20h 51mLATAM Airlines
Deal found 5/10$1,180
Sun 5/125:35 pmSTL - EZE
2 stops36h 25mUnited Airlines
Mon 5/279:00 pmEZE - STL
1 stop14h 53mUnited Airlines
Deal found 5/11$1,185
Sun 5/123:27 pmSTL - EZE
1 stop16h 13mDelta
Mon 5/278:00 pmEZE - STL
1 stop21h 57mDelta
Deal found 5/11$1,189

St. Louis to Buenos Aires 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Buenos Aires in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.
These are some of the best deals we've found on flights to Buenos Aires in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Mon 8/194:31 pmSTL - EZE
3 stops37h 16mMultiple Airlines
Sun 8/251:40 amEZE - STL
3 stops22h 34mMultiple Airlines
Deal found 5/10$918
Mon 8/194:31 pmSTL - EZE
3 stops37h 16mMultiple Airlines
Mon 8/266:40 amEZE - STL
3 stops28h 59mMultiple Airlines
Deal found 5/10$953
Mon 8/195:05 pmSTL - AEP
2 stops20h 55mLATAM Airlines
Mon 8/265:10 pmAEP - STL
2 stops28h 04mLATAM Airlines
Deal found 5/10$1,000
Wed 11/1310:00 amSTL - EZE
1 stop20h 00mDelta
Thu 11/288:55 pmEZE - STL
1 stop22h 01mDelta
Deal found 5/10$1,000
Mon 8/199:06 amSTL - EZE
2 stops19h 59mAmerican Airlines
Mon 8/2610:20 pmEZE - STL
2 stops23h 00mAmerican Airlines
Deal found 5/10$1,001
Mon 8/195:05 pmSTL - AEP
2 stops22h 55mLATAM Airlines
Sun 8/255:10 pmAEP - STL
2 stops19h 37mLATAM Airlines
Deal found 5/10$1,040
Sat 9/76:00 amSTL - EZE
2 stops22h 15mDelta
Tue 9/108:00 pmEZE - STL
1 stop16h 43mDelta
Deal found 5/9$1,040
Wed 11/1311:51 amSTL - EZE
2 stops19h 09mDelta
Thu 11/288:55 pmEZE - STL
1 stop14h 56mDelta
Deal found 5/10$1,041
Wed 11/139:39 amSTL - EZE
1 stop21h 31mAmerican Airlines
Wed 11/2712:40 amEZE - STL
2 stops19h 34mAmerican Airlines
Deal found 5/10$1,043

One-way flights to Buenos Aires from St. Louis

Search for one-way flight options from St. Louis to Buenos Aires. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.
Take a look at some of the one-way flights we've detected from St. Louis to Buenos Aires. Users in need of a round-trip flight from St. Louis to Buenos Aires instead should update the search form at the top of page.
Sun 6/95:22 pmSTL - EZE
2 stops36h 24mMultiple Airlines
Deal found 5/10$333
Sun 6/96:55 pmSTL - EZE
3 stops34h 51mMultiple Airlines
Deal found 5/10$346
Sun 6/95:22 pmSTL - AEP
3 stops52h 48mMultiple Airlines
Deal found 5/10$349
Sat 8/36:29 pmSTL - EZE
3 stops37h 31mMultiple Airlines
Deal found 5/10$403
Sun 8/46:29 pmSTL - AEP
3 stops36h 52mMultiple Airlines
Deal found 5/10$443
Sun 8/46:29 pmSTL - EZE
3 stops27h 36mMultiple Airlines
Deal found 5/10$472
Sat 8/311:34 amSTL - EZE
2 stops39h 01mMultiple Airlines
Deal found 5/10$501
Sun 6/95:22 pmSTL - AEP
2 stops32h 43mMultiple Airlines
Deal found 5/10$551
Sun 8/411:33 amSTL - EZE
2 stops24h 57mMultiple Airlines
Deal found 5/10$640

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

Customize your flight search to find flights from St. Louis to Buenos Aires 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, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$918 - $1,414

Route

Depart

Return

Price

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/19

3 stops37h 16m

Buenos Aires Ministro Pistarini

Sun 8/25

3 stops22h 34m

$918

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/19

3 stops37h 16m

Buenos Aires Ministro Pistarini

Mon 8/26

3 stops28h 59m

$953

Lambert-St LouisBuenos Aires Jorge Newbery

STL - AEP

STLAEP

Lambert-St Louis

Mon 8/19

2 stops20h 55m

Buenos Aires Jorge Newbery

Mon 8/26

2 stops28h 04m

$1,000

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/19

2 stops18h 15m

Buenos Aires Ministro Pistarini

Mon 8/26

1 stop21h 57m

$1,000

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/19

2 stops19h 59m

Buenos Aires Ministro Pistarini

Mon 8/26

2 stops23h 00m

$1,001

Lambert-St LouisBuenos Aires Jorge Newbery

STL - AEP

STLAEP

Lambert-St Louis

Mon 8/19

2 stops22h 55m

Buenos Aires Jorge Newbery

Sun 8/25

2 stops19h 37m

$1,040

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 7/11

1 stop23h 40m

Buenos Aires Ministro Pistarini

Fri 7/26

2 stops20h 40m

$1,044

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Wed 5/29

2 stops20h 45m

Buenos Aires Ministro Pistarini

Mon 6/17

3 stops25h 16m

$1,308

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Mon 8/19

2 stops43h 10m

Buenos Aires Ministro Pistarini

Mon 8/26

3 stops29h 56m

$1,414

Flights are sorted by cheapest first

Deals found on 5/10

When is the best time to book a flight from St. Louis to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Buenos Aires. Price data was last updated on May 3, 2024.
The price you pay for your flight from St. Louis to Buenos Aires may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from St. Louis to Buenos Aires?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Buenos Aires. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Buenos Aires flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Buenos Aires by month

Plan your trip from St. Louis to Buenos Aires by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Buenos Aires is currently $449 while a round-trip flight costs $1,075. Price data was last updated on May 5, 2024.

Currently, September is the cheapest month in which you can book a flight from St. Louis to Buenos Aires (average of $793). Flying from St. Louis to Buenos Aires in December is currently the most expensive (average of $1,153). 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.

January

$996

February

$1,121

March

$1,024

April

$797

May

$828

June

$871

July

$981

August

$809

September

$793

October

$881

November

$963

December

$1,153

Temperature and rainfall in Buenos Aires by month

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

BUE

Temperature

51.8 - 77 °F

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated May 11, 2024.
Get a feel of what it's like to fly with Delta, American Airlines and Air Canada 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
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,751 reviews
Delta
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Copa Airlines
8.0
Very good
2,738 reviews
Delta
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

LATAM Airlines
7.6
Good
2,434 reviews
Delta
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Avianca
7.5
Good
3,802 reviews
Delta
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
11,014 reviews
Delta
8.1
Very good
10,751 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.1

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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?

    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 5 different airlines.

  • Can I find flights from St. Louis to Buenos Aires for under $1,000 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Buenos Aires for under $1,000. The cheapest flight booked recently is on Multiple Airlines for just $918, but on average you can expect to pay $1,044.

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

    Currently priced at $1,000, LATAM Airlines will fly you from St. Louis to Buenos Aires and back. In addition to LATAM Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $1,000 and $1,001, respectively. These flights start at 17% lower than the current average price 3 months from now.

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

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

  • What does STL to EZE mean?

    This is defined as Lambert-St Louis Airport (STL) and Buenos Aires Ministro Pistarini Airport (EZE). Codes like Buenos Aires Ministro Pistarini Airport are often used to just call airports uniquely. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Buenos Aires Jorge Newbery Airport (AEP).

  • Can I find deals for flights from St. Louis to Buenos Aires that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Buenos Aires flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Buenos Aires with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Buenos Aires flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by 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.

  • Can I find deals for flights from St. Louis to Buenos Aires that allow pets onboard?

    Many airlines flying from St. Louis to Buenos Aires offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Buenos Aires?

    Yes, you can often find last-minute deals on St. Louis to Buenos Aires flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Buenos Aires flight deals updated?

    The St. Louis to Buenos Aires flight deals you see on this page were last updated on 5/10.

See more FAQs

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Alternative routes for St. Louis to Buenos Aires
See prices for flight routes from nearby airports that may be better suited for you.

St. Louis to Jorge Newbery flights
St. Louis to Ministro Pistarini flights
Kansas City to Ministro Pistarini flights
Kansas City to Jorge Newbery flights
Kansas City to Cordoba flights

Top 5 airlines flying from St. Louis to Buenos Aires

Discover the top 5 airlines that operate flights from St. Louis to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,684,066 searches. Data last updated May 11, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$814Average$1,197FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$923Average$1,277FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$959Average$1,265FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Copa AirlinesCheapest$1,003Average$1,413FlexibilityNo cancel feeOn-time70%
Search Copa Airlines flights
LATAM AirlinesCheapest$1,100Average$1,546FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
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Search flights from St. Louis to Buenos Aires by cabin class

Find flights from St. Louis to Buenos Aires, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Why should you use Cheapflights to find cheap flight tickets from St. Louis to Buenos Aires?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Buenos Aires.

Can Cheapflights find flights from St. Louis to Buenos Aires with no change fees?

Need flexible booking options for your flight to Buenos Aires from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Buenos Aires become cheaper?

Not ready to book yet? You can track prices for flights from St. Louis to Buenos Aires on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
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