STL - BUE

$435 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 9/11. 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
$1,118
LATAM Airlines
Wed 1/13Wed 1/20
STL - EZE • 2 stops
Cheapest one-way
$435
Multiple Airlines
Fri 9/11
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 23m (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, Jan 13 - Wed, Jan 20
LATAM Airlines Logo
11:51 am - 9:40 am
STL
-
EZE
18h 49m
2 stops
LATAM Airlines Logo
1:10 pm - 10:48 am
EZE
-
STL
24h 38m
2 stops
$1,118LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
9:00 am - 9:40 am
STL
-
EZE
21h 40m
2 stops
LATAM Airlines Logo
7:20 am - 11:39 pm
EZE
-
STL
19h 19m
2 stops
$1,133LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
10:00 am - 9:40 am
STL
-
EZE
20h 40m
2 stops
LATAM Airlines Logo
7:20 am - 9:33 pm
EZE
-
STL
17h 13m
2 stops
$1,133LATAM Airlines
Wed, Dec 2 - Thu, Dec 17
LATAM Airlines Logo
12:20 pm - 9:40 am
STL
-
EZE
18h 20m
2 stops
LATAM Airlines Logo
7:20 am - 8:53 am
EZE
-
STL
28h 33m
2 stops
$1,133LATAM Airlines
Tue, Jan 12 - Thu, Jan 21
Delta Logo
3:40 pm - 4:00 pm
STL
-
AEP
21h 20m
2 stops
Delta Logo
5:35 pm - 2:43 pm
AEP
-
STL
24h 08m
2 stops
$1,148Delta
Tue, Jan 12 - Tue, Jan 19
Delta Logo
3:40 pm - 4:00 pm
STL
-
AEP
21h 20m
2 stops
Delta Logo
5:35 pm - 3:55 pm
AEP
-
STL
25h 20m
2 stops
$1,148Delta
Wed, Dec 2 - Thu, Dec 17
American Airlines Logo
5:10 am - 7:25 am
STL
-
EZE
23h 15m
1 stop
American Airlines Logo
10:30 pm - 5:10 pm
EZE
-
STL
21h 40m
1 stop
$1,148American Airlines
Wed, Jan 13 - Wed, Jan 20
Multiple Airlines Logo
9:00 am - 9:40 am
STL
-
EZE
21h 40m
1 stop
Multiple Airlines Logo
11:35 pm - 10:48 am
EZE
-
STL
14h 13m
1 stop
$1,148Multiple Airlines
Mon, Jan 11 - Wed, Jan 20
Delta Logo
3:40 pm - 4:00 pm
STL
-
AEP
21h 20m
2 stops
Delta Logo
8:05 pm - 3:55 pm
AEP
-
STL
22h 50m
2 stops
$1,148Delta
Thu, Sep 10 - Thu, Sep 17
American Airlines Logo
2:11 pm - 7:15 am
STL
-
EZE
15h 04m
1 stop
American Airlines Logo
8:45 pm - 1:21 pm
EZE
-
STL
18h 36m
1 stop
$1,188American 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 $1,460 respectively.

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Good to know

Cheapest flight

$435
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 $435 for a one-way ticket and $1,118 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?

    SkyTeam is the only airline alliance operating flights between St. Louis and Buenos Aires.

  • 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)