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Cheap flights from St. Louis (STL) to Buenos Aires (BUE) from $343

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 6/8. 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. 21 — may. 281
From?
To?
mar. 5/21
mar. 5/28
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 Monday 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 mayo 16, 2024.

Popular in

December

Cheapest in

October

Round-trip from

$795

One-way from

$668
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?

Friday 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 18% 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 2,637,452 searches. Data last updated mayo 16, 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.
mar. 7/163:49 pmSTL - EZE
1 stop15h 56mDelta
mar. 7/238:00 pmEZE - STL
1 stop22h 20mDelta
Deal found 5/14$1,000
sáb. 9/72:05 pmSTL - EZE
1 stop17h 35mDelta
mar. 9/107:35 amEZE - STL
2 stops31h 19mDelta
Deal found 5/15$1,040
jue. 10/102:05 pmSTL - EZE
1 stop17h 30mDelta
vie. 10/256:10 amEZE - STL
2 stops19h 25mDelta
Deal found 5/15$1,122
mié. 5/2912:53 pmSTL - EZE
1 stop18h 47mDelta
lun. 6/178:00 pmEZE - STL
1 stop22h 20mDelta
Deal found 5/15$1,164
mié. 5/2912:53 pmSTL - EZE
2 stops20h 37mDelta
lun. 6/178:00 pmEZE - STL
1 stop15h 10mDelta
Deal found 5/15$1,168
vie. 6/144:02 pmSTL - EZE
1 stop15h 43mDelta
vie. 6/216:10 amEZE - STL
2 stops17h 03mDelta
Deal found 5/15$1,214
jue. 10/102:05 pmSTL - EZE
1 stop17h 30mDelta
vie. 10/258:00 pmEZE - STL
1 stop16h 43mDelta
Deal found 5/15$1,219
lun. 8/511:51 amSTL - EZE
2 stops16h 24mDelta
mié. 8/78:00 pmEZE - STL
1 stop18h 58mDelta
Deal found 5/15$1,224
mié. 5/293:27 pmSTL - EZE
1 stop16h 13mDelta
lun. 6/178:00 pmEZE - STL
1 stop22h 20mDelta
Deal found 5/16$1,234

Cheap United Airlines flights from St. Louis to Buenos Aires

Explore cheap flight options specifically provided by United 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 2,637,452 searches. Data last updated mayo 16, 2024.
Browse through some of the cheapest United Airlines flights traveling from St. Louis to Buenos Aires. Check back soon if you're not seeing flights that suit your needs.
jue. 9/511:10 amSTL - EZE
2 stops18h 50mUnited Airlines
dom. 9/89:00 pmEZE - STL
2 stops39h 07mUnited Airlines
Deal found 5/15$1,061
vie. 8/96:20 amSTL - EZE
1 stop23h 40mUnited Airlines
dom. 8/189:00 pmEZE - STL
1 stop14h 51mUnited Airlines
Deal found 5/16$1,080
vie. 8/95:03 pmSTL - EZE
1 stop12h 57mUnited Airlines
dom. 8/189:00 pmEZE - STL
2 stops20h 49mUnited Airlines
Deal found 5/16$1,084
mié. 5/295:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
lun. 6/179:00 pmEZE - STL
1 stop21h 25mUnited Airlines
Deal found 5/16$1,185
jue. 6/136:30 amSTL - EZE
2 stops23h 30mUnited Airlines
lun. 6/179:00 pmEZE - STL
2 stops20h 41mUnited Airlines
Deal found 5/15$1,228

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 2,637,452 searches. Prices were last updated on mayo 16, 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.
jue. 6/138:12 pmSTL - EZE
3 stops30h 23mMultiple Airlines
dom. 6/161:40 amEZE - STL
3 stops38h 43mMultiple Airlines
Deal found 5/15$1,042
jue. 6/138:12 pmSTL - EZE
3 stops30h 23mMultiple Airlines
lun. 6/176:40 amEZE - STL
3 stops33h 43mMultiple Airlines
Deal found 5/15$1,077
mié. 5/293:27 pmSTL - AEP
2 stops18h 06mLATAM Airlines
lun. 6/175:10 pmAEP - STL
2 stops20h 51mLATAM Airlines
Deal found 5/15$1,164
mié. 5/2912:53 pmSTL - EZE
1 stop18h 47mDelta
lun. 6/178:00 pmEZE - STL
1 stop22h 20mDelta
Deal found 5/15$1,164
mié. 5/2912:53 pmSTL - EZE
2 stops20h 37mDelta
lun. 6/178:00 pmEZE - STL
1 stop15h 10mDelta
Deal found 5/15$1,168
mié. 5/295:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
lun. 6/179:00 pmEZE - STL
1 stop21h 25mUnited Airlines
Deal found 5/16$1,185
jue. 6/135:25 pmSTL - AEP
2 stops16h 08mLATAM Airlines
jue. 6/204:10 pmAEP - STL
2 stops19h 00mLATAM Airlines
Deal found 5/15$1,186
dom. 6/306:20 amSTL - EZE
1 stop23h 40mUnited Airlines
lun. 7/299:00 pmEZE - STL
1 stop27h 17mUnited Airlines
Deal found 5/16$1,186
dom. 6/306:30 amSTL - EZE
2 stops23h 30mUnited Airlines
lun. 7/299:00 pmEZE - STL
1 stop27h 17mUnited Airlines
Deal found 5/16$1,191

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 2,637,452 searches. Data last updated mayo 16, 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.
mié. 11/1310:00 amSTL - AEP
3 stops20h 08mLATAM Airlines
jue. 11/285:10 pmAEP - STL
2 stops20h 23mLATAM Airlines
Deal found 5/15$1,000
mié. 11/132:05 pmSTL - EZE
1 stop15h 55mDelta
jue. 11/288:55 pmEZE - STL
1 stop16h 38mDelta
Deal found 5/16$1,000
mié. 11/1311:51 amSTL - EZE
2 stops19h 09mDelta
jue. 11/288:55 pmEZE - STL
1 stop18h 59mDelta
Deal found 5/15$1,036
vie. 8/2311:51 amSTL - AEP
2 stops26h 09mLATAM Airlines
mar. 8/277:10 pmAEP - STL
2 stops26h 04mLATAM Airlines
Deal found 5/14$1,040
sáb. 9/72:05 pmSTL - EZE
1 stop17h 35mDelta
mar. 9/107:35 amEZE - STL
2 stops31h 19mDelta
Deal found 5/15$1,040
jue. 6/138:12 pmSTL - EZE
3 stops30h 23mMultiple Airlines
dom. 6/161:40 amEZE - STL
3 stops38h 43mMultiple Airlines
Deal found 5/15$1,042
mié. 11/139:39 amSTL - EZE
1 stop21h 31mAmerican Airlines
mié. 11/2712:40 amEZE - STL
2 stops19h 34mAmerican Airlines
Deal found 5/15$1,043
jue. 9/511:10 amSTL - EZE
2 stops18h 50mUnited Airlines
dom. 9/89:00 pmEZE - STL
2 stops39h 07mUnited Airlines
Deal found 5/15$1,061
mar. 7/1610:08 amSTL - EZE
2 stops38h 47mLATAM Airlines
mar. 7/239:10 amEZE - STL
2 stops28h 28mLATAM Airlines
Deal found 5/14$1,067

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 2,637,452 searches. Data last updated mayo 16, 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.
sáb. 6/86:22 pmSTL - EZE
2 stops49h 46mMultiple Airlines
Deal found 5/15$343
jue. 6/207:44 pmSTL - AEP
3 stops50h 26mMultiple Airlines
Deal found 5/15$394
lun. 6/246:16 pmSTL - AEP
3 stops51h 54mMultiple Airlines
Deal found 5/15$403
jue. 9/56:24 pmSTL - EZE
3 stops31h 46mMultiple Airlines
Deal found 5/15$419
sáb. 6/86:22 pmSTL - EZE
3 stops43h 28mMultiple Airlines
Deal found 5/15$423
sáb. 6/86:22 pmSTL - AEP
3 stops49h 38mMultiple Airlines
Deal found 5/15$431
jue. 6/207:44 pmSTL - EZE
3 stops30h 51mMultiple Airlines
Deal found 5/15$452
vie. 9/64:31 pmSTL - EZE
3 stops32h 54mMultiple Airlines
Deal found 5/15$479
vie. 9/64:31 pmSTL - AEP
3 stops36h 44mMultiple Airlines
Deal found 5/15$485

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 2,637,452 searches. Data last updated mayo 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,000 - $1,345

Route

Depart

Return

Price

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

mar. 7/16

1 stop15h 56m

Buenos Aires Ministro Pistarini

mar. 7/23

1 stop22h 20m

$1,000

Lambert-St LouisBuenos Aires Jorge Newbery

STL - AEP

STLAEP

Lambert-St Louis

vie. 8/23

2 stops26h 09m

Buenos Aires Jorge Newbery

mar. 8/27

2 stops26h 04m

$1,040

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

sáb. 9/7

1 stop17h 35m

Buenos Aires Ministro Pistarini

mar. 9/10

2 stops31h 19m

$1,040

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

jue. 6/13

3 stops30h 23m

Buenos Aires Ministro Pistarini

dom. 6/16

3 stops38h 43m

$1,042

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

jue. 9/5

2 stops18h 50m

Buenos Aires Ministro Pistarini

dom. 9/8

2 stops39h 07m

$1,061

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

mar. 7/16

2 stops38h 47m

Buenos Aires Ministro Pistarini

mar. 7/23

2 stops28h 28m

$1,067

Lambert-St LouisBuenos Aires Jorge Newbery

STL - AEP

STLAEP

Lambert-St Louis

jue. 9/5

3 stops33h 27m

Buenos Aires Jorge Newbery

dom. 9/8

3 stops31h 34m

$1,069

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

sáb. 8/10

2 stops21h 51m

Buenos Aires Ministro Pistarini

sáb. 8/17

2 stops21h 15m

$1,083

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

sáb. 8/10

3 stops48h 50m

Buenos Aires Ministro Pistarini

sáb. 8/17

2 stops24h 56m

$1,345

Flights are sorted by cheapest first

Deals found on 5/14

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 10, 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 12, 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 $425 while a round-trip flight costs $1,083. Price data was last updated on May 12, 2024.

Currently, April 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

$1,125

March

$1,024

April

$793

May

$828

June

$871

July

$991

August

$806

September

$798

October

$861

November

$964

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 mayo 16, 2024.
Get a feel of what it's like to fly with Delta, United Airlines and American 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
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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
8.0
Very good
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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
2,707 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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
2,405 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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
3,765 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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
10,924 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Food

7.4

Crew

8.6

Comfort

7.9

Overall

8.0

Entertainment

8.0

Boarding

8.2

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 Delta for just $1,000, but on average you can expect to pay $1,088.

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

    Currently priced at $1,000, 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 $1,040 and $1,061, respectively. These flights start at 17% 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 Copa Airlines, with whom users have recently found tickets for as low as $668. However, be on the lookout for offers from United Airlines and LATAM Airlines, as they are both options that can get you from St. Louis to Buenos Aires for a low price.

  • 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 5/16.

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 2,637,452 searches. Data last updated mayo 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$814Average$1,197FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$925Average$1,283FlexibilityNo 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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Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis to Buenos Aires?

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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?

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

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