STL - BUE

$716 Find Cheap Flights from St. Louis to Buenos Aires - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Buenos Aires departing on 1/9. 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.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,148
Typical prices: $1,225-$1,667
American Airlines
Wed 12/2Thu 12/17
STL - EZE • 1 stop
Cheapest one-way
$716
Multiple Airlines
Sat 1/9
STL - EZE • 3 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Buenos Aires. You'll need at least 1 connection.
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Top layover airports
Dallas (DFW)
Cheapest • Avg $1,253 (round-trip)
Atlanta (ATL)
Shortest trip • 13h 22m (one-way)
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Flight Deals

Cheap Flights from St. Louis to Buenos Aires (STL-BUE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Buenos Aires that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Buenos Aires

Wed, Dec 2 - Thu, Dec 17
American Airlines Logo
5:00 pm - 9:10 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 10m1 stop Miami
American Airlines Logo
9:40 pm - 11:33 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
16h 53m1 stop Miami
$1,148American Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
12:20 pm - 7:35 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
16h 15m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
5:00 pm - 8:53 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 53m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
Delta Logo
10:00 am - 6:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
17h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:00 pm - 11:15 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
21h 15m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson
$1,148Delta
Wed, Dec 2 - Thu, Dec 17
Delta Logo
10:00 am - 7:40 amSTL  Lambert-St Louis-AEP Buenos Aires Jorge Newbery
18h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
Delta Logo
5:35 pm - 11:15 amAEP  Buenos Aires Jorge Newbery-STL Lambert-St Louis
20h 40m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148Delta
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
5:37 pm - 9:40 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
13h 03m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
11:35 pm - 11:15 amEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
14h 40m1 stop Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
6:00 am - 9:50 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
24h 50m2 stops Atlanta Hartsfield-Jackson Miami
LATAM Airlines Logo
7:20 am - 11:56 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 36m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
$1,148LATAM Airlines
Thu, Sep 17 - Thu, Sep 24
American Airlines Logo
2:11 pm - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
16h 19m1 stop Miami
American Airlines Logo
8:45 pm - 1:21 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 36m1 stop Miami
$1,188American Airlines
Thu, Sep 17 - Thu, Sep 24
American Airlines Logo
2:11 pm - 8:30 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
16h 19m1 stop Miami
American Airlines Logo
10:15 pm - 2:44 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
18h 29m2 stops Miami Dallas/Fort Worth
$1,192American Airlines
Tue, Dec 22 - Tue, Dec 29
United Airlines Logo
6:50 pm - 7:20 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
33h 30m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
10:05 pm - 10:19 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
27h 14m1 stop Houston George Bush Intcntl
$1,220United Airlines
Sun, Sep 20 - Sun, Sep 27
United Airlines Logo
6:53 pm - 8:00 amSTL  Lambert-St Louis-EZE Buenos Aires Ministro Pistarini
35h 07m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
9:00 pm - 2:10 pmEZE  Buenos Aires Ministro Pistarini-STL Lambert-St Louis
19h 10m1 stop Houston George Bush Intcntl
$1,232United Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Buenos Aires flights

Get data-powered insights and trends into flights from St. Louis to Buenos Aires to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Buenos Aires, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Buenos Aires is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $1,646 and $1,414 respectively.

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Good to know

Cheapest flight

$716
Flight from St. Louis to Buenos Aires Ministro Pistarini

When to book flights from St. Louis to Buenos Aires

Are your dates flexible? Find out the best times to travel from St. Louis to Buenos Aires based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Buenos Aires

  • What is the cheapest flight from St. Louis to Buenos Aires?

    In the last 5 days, the lowest price for a flight from St. Louis to Buenos Aires was $716 for a one-way ticket and $1,148 for a round-trip.

  • Do I need a passport to fly between St. Louis and Buenos Aires?

    A passport is required to fly from St. Louis to Buenos Aires.

  • Which airports will I be using when flying from St. Louis to Buenos Aires?

    St. Louis is served by only 1 airport and there are 2 airports in Buenos Aires. You will leave St. Louis from Lambert-St Louis and you will be arriving in Buenos Aires at one of these airports: Buenos Aires Jorge Newbery or Buenos Aires Ministro Pistarini.

  • Which aircraft models fly most regularly from St. Louis to Buenos Aires?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Buenos Aires?

    oneworld, and SkyTeam are the airline alliances operating flights between St. Louis and Buenos Aires, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Buenos Aires, Delta or LATAM Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Buenos Aires are Delta and LATAM Airlines. With an average price for the route of $1,377 and an overall rating of 7.8, Delta is the most popular choice. LATAM Airlines is also a great choice for the route, with an average price of $1,256 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Buenos Aires?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Buenos Aires.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Buenos Aires?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buenos Aires from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Buenos Aires?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Buenos Aires with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Buenos Aires?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Buenos Aires from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Information on your arrival and departure airports

St. Louis (STL)