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Cheap flights from St. Louis (STL) to Buenos Aires (BUE) from $514

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 5/8. 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 2 — May 91
From?
To?
Thu 5/2
Thu 5/9
1 adult, Economy
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The best prices from Lambert-St Louis to Buenos Aires are usually found in October or September, 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 April 27, 2024.

Popular in

December

Cheapest in

October

Round-trip from

$791

One-way from

$514
High demand for flights, 26% potential price rise
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Best time to find cheap flights, 16% potential price drop
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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)
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What is the cheapest day to fly round-trip from St. Louis to Buenos Aires?

Tuesday 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 39% on this flight, we recommend booking at least 29 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 $1,477 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 $1,368 per person but you can even find prices for as low as $838. The most expensive prices can be found in the month of December. Opting for a October flight can save you 34% 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 16% on flights from St. Louis to Buenos Aires by exploring options for tickets in the afternoon.

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 2,991,349 searches. Data last updated April 27, 2024.
Peruse some of the lowest-priced United Airlines flights we've found from St. Louis to Buenos Aires. It's recommended that users confirm their flight details before booking.
Tue 7/236:20 amSTL - EZE
1 stop23h 40mUnited Airlines
Mon 7/299:00 pmEZE - STL
1 stop21h 28mUnited Airlines
Deal found 4/26$1,038
Tue 7/236:20 amSTL - EZE
1 stop23h 40mUnited Airlines
Mon 7/299:00 pmEZE - STL
2 stops43h 18mUnited Airlines
Deal found 4/26$1,090
Wed 5/298:55 amSTL - EZE
1 stop21h 05mUnited Airlines
Mon 6/179:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,091
Wed 5/296:30 amSTL - EZE
2 stops23h 30mUnited Airlines
Mon 6/179:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,095
Thu 10/106:15 amSTL - EZE
1 stop23h 45mUnited Airlines
Fri 10/259:00 pmEZE - STL
1 stop14h 54mUnited Airlines
Deal found 4/26$1,110
Thu 10/106:15 amSTL - EZE
1 stop23h 45mUnited Airlines
Fri 10/259:00 pmEZE - STL
2 stops20h 49mUnited Airlines
Deal found 4/26$1,114
Wed 5/298:05 amSTL - EZE
2 stops21h 55mUnited Airlines
Mon 6/179:00 pmEZE - STL
2 stops20h 41mUnited Airlines
Deal found 4/26$1,156
Sun 5/265:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
Sun 6/29:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,203
Sun 5/265:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
Sun 6/29:00 pmEZE - STL
2 stops44h 41mUnited Airlines
Deal found 4/26$1,211

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 2,991,349 searches. Data last updated April 27, 2024.
Browse through some of the cheapest Delta flights traveling from St. Louis to Buenos Aires. Check back soon if you're not seeing flights that suit your needs.
Sat 9/711:51 amSTL - EZE
1 stop19h 49mDelta
Tue 9/108:00 pmEZE - STL
1 stop16h 43mDelta
Deal found 4/25$1,040
Sat 9/72:05 pmSTL - EZE
1 stop17h 35mDelta
Mon 9/93:45 amEZE - STL
2 stops21h 50mDelta
Deal found 4/25$1,160
Sun 5/265:07 pmSTL - EZE
1 stop14h 33mDelta
Sun 6/28:00 pmEZE - STL
1 stop20h 22mDelta
Deal found 4/26$1,214
Sun 7/215:25 pmSTL - EZE
1 stop14h 20mDelta
Sat 7/278:00 pmEZE - STL
1 stop22h 20mDelta
Deal found 4/26$1,227

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

Find cheap flight options from St. Louis to Buenos Aires specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Prices were last updated on April 27, 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.
Sun 5/267:30 pmSTL - EZE
3 stops31h 05mMultiple Airlines
Sat 6/11:40 amEZE - STL
2 stops19h 00mMultiple Airlines
Deal found 4/26$891
Wed 5/298:55 amSTL - EZE
1 stop21h 05mUnited Airlines
Mon 6/179:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,091
Wed 5/296:30 amSTL - EZE
2 stops23h 30mUnited Airlines
Mon 6/179:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,095
Sun 5/267:30 pmSTL - EZE
3 stops31h 05mMultiple Airlines
Sun 6/26:40 amEZE - STL
3 stops34h 34mMultiple Airlines
Deal found 4/26$1,103
Wed 5/298:05 amSTL - EZE
2 stops21h 55mUnited Airlines
Mon 6/179:00 pmEZE - STL
2 stops20h 41mUnited Airlines
Deal found 4/26$1,156
Sun 5/265:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
Sun 6/29:00 pmEZE - STL
1 stop27h 15mUnited Airlines
Deal found 4/26$1,203
Sun 5/265:31 pmSTL - EZE
2 stops36h 29mUnited Airlines
Sun 6/29:00 pmEZE - STL
2 stops44h 41mUnited Airlines
Deal found 4/26$1,211
Fri 4/263:51 pmSTL - EZE
1 stop15h 09mDelta
Fri 5/36:10 amEZE - STL
2 stops19h 36mDelta
Deal found 4/25$1,214
Fri 4/261:11 pmSTL - EZE
2 stops16h 19mAmerican Airlines
Fri 5/39:25 pmEZE - STL
2 stops20h 31mAmerican Airlines
Deal found 4/25$1,215

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 2,991,349 searches. Data last updated April 27, 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.
Sun 5/267:30 pmSTL - EZE
3 stops31h 05mMultiple Airlines
Sat 6/11:40 amEZE - STL
2 stops19h 00mMultiple Airlines
Deal found 4/26$891
Wed 11/132:05 pmSTL - EZE
2 stops25h 30mLATAM Airlines
Wed 11/273:45 amEZE - STL
2 stops22h 50mLATAM Airlines
Deal found 4/27$1,000
Wed 11/132:43 pmSTL - EZE
2 stops17h 07mAmerican Airlines
Wed 11/2712:40 amEZE - STL
2 stops19h 34mAmerican Airlines
Deal found 4/26$1,001
Wed 11/139:39 amSTL - EZE
1 stop21h 31mAmerican Airlines
Thu 11/2811:35 pmEZE - STL
2 stops20h 39mAmerican Airlines
Deal found 4/26$1,003
Wed 11/1311:58 amSTL - EZE
1 stop19h 12mAmerican Airlines
Wed 11/2712:40 amEZE - STL
1 stop25h 31mAmerican Airlines
Deal found 4/26$1,011
Tue 7/236:20 amSTL - EZE
1 stop23h 40mUnited Airlines
Mon 7/299:00 pmEZE - STL
1 stop21h 28mUnited Airlines
Deal found 4/26$1,038
Fri 8/236:00 amSTL - AEP
2 stops32h 00mLATAM Airlines
Tue 8/277:10 pmAEP - STL
2 stops17h 37mLATAM Airlines
Deal found 4/25$1,040
Sat 9/711:51 amSTL - EZE
1 stop19h 49mDelta
Tue 9/108:00 pmEZE - STL
1 stop16h 43mDelta
Deal found 4/25$1,040
Thu 6/66:30 amSTL - EZE
2 stops23h 30mAir Canada
Thu 6/209:00 pmEZE - STL
1 stop25h 25mAir Canada
Deal found 4/26$1,055

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 2,991,349 searches. Data last updated April 27, 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.
Wed 5/811:10 amSTL - EZE
2 stops18h 30mCopa Airlines
Deal found 4/26$514
Wed 5/811:36 amSTL - EZE
3 stops34h 29mMultiple Airlines
Deal found 4/26$599
Wed 5/83:25 pmSTL - EZE
1 stop37h 00mLufthansa
Deal found 4/26$2,184

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 2,991,349 searches. Data last updated April 27, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$891 - $1,293

Route

Depart

Return

Price

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Sun 5/26

3 stops31h 05m

Buenos Aires Ministro Pistarini

Sat 6/1

2 stops19h 00m

$891

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Tue 7/23

1 stop23h 40m

Buenos Aires Ministro Pistarini

Mon 7/29

1 stop21h 28m

$1,038

Lambert-St LouisBuenos Aires Jorge Newbery

STL - AEP

STLAEP

Lambert-St Louis

Fri 8/23

2 stops32h 00m

Buenos Aires Jorge Newbery

Tue 8/27

2 stops17h 37m

$1,040

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Sat 9/7

1 stop19h 49m

Buenos Aires Ministro Pistarini

Tue 9/10

1 stop16h 43m

$1,040

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 6/6

2 stops23h 30m

Buenos Aires Ministro Pistarini

Thu 6/20

1 stop25h 25m

$1,055

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 6/6

2 stops23h 30m

Buenos Aires Ministro Pistarini

Thu 6/20

1 stop25h 25m

$1,060

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 6/6

1 stop21h 05m

Buenos Aires Ministro Pistarini

Thu 6/20

1 stop27h 15m

$1,061

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 6/6

2 stops23h 30m

Buenos Aires Ministro Pistarini

Thu 6/20

2 stops44h 41m

$1,084

Lambert-St LouisBuenos Aires Ministro Pistarini

STL - EZE

STLEZE

Lambert-St Louis

Thu 6/6

2 stops21h 21m

Buenos Aires Ministro Pistarini

Wed 6/19

2 stops19h 04m

$1,293

Flights are sorted by cheapest first

Deals found on 4/26

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 January 28, 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 April 21, 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 $1,099 while a round-trip flight costs $1,062. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from St. Louis to Buenos Aires (average of $791). 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

$998

February

$1,128

March

$1,024

April

$806

May

$822

June

$875

July

$963

August

$824

September

$791

October

$867

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 April 27, 2024.
Get a feel of what it's like to fly with United Airlines, Delta 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
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,951 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Copa Airlines
8.0
Very good
2,854 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Austrian Airlines
7.7
Good
1,083 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

LATAM Airlines
7.6
Good
2,487 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

United Airlines
7.4
Good
11,228 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

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 $900 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Buenos Aires for under $900. The cheapest flight booked recently is on Multiple Airlines for just $891, but on average you can expect to pay $1,070.

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

    Currently priced at $1,038, United Airlines will fly you from St. Louis to Buenos Aires and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from LATAM Airlines and Delta - these airlines can fly you to your destination from $1,040 and $1,040, respectively. These flights start at 24% 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 4/27.

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.

Kansas City to Ministro Pistarini flights
St. Louis to Jorge Newbery flights
St. Louis 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 2,991,349 searches. Data last updated April 27, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$814Average$1,197FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$919Average$1,292FlexibilityNo 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

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Buenos Aires from St. Louis today with Cheapflights!

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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