$894 Find Cheap Flights from St. Louis to Argentina

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Argentina departing on 8/10. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Argentina

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Book Cheap St. Louis to Argentina Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Argentina 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 Argentina

Mon, Aug 10 - Thu, Aug 20
LATAM Airlines Logo
12:52 pm - 9:45 am
STL
-
EZE
18h 53m
1 stop
LATAM Airlines Logo
1:10 pm - 11:46 am
EZE
-
STL
24h 36m
2 stops
$894LATAM Airlines
Thu, Jun 4 - Wed, Jun 17
Delta Logo
7:01 pm - 9:45 am
STL
-
EZE
12h 44m
1 stop
Delta Logo
7:35 am - 8:16 am
EZE
-
STL
26h 41m
2 stops
$899Delta
Thu, Jun 4 - Wed, Jun 17
Delta Logo
9:13 am - 7:40 am
STL
-
AEP
20h 27m
2 stops
Delta Logo
3:45 pm - 9:46 am
AEP
-
STL
20h 01m
2 stops
$909Delta
Mon, Aug 10 - Thu, Aug 20
LATAM Airlines Logo
12:52 pm - 9:45 am
STL
-
EZE
18h 53m
1 stop
LATAM Airlines Logo
8:10 pm - 8:08 am
EZE
-
STL
13h 58m
1 stop
$909LATAM Airlines
Thu, Jun 18 - Thu, Jun 25
LATAM Airlines Logo
10:51 am - 9:40 am
STL
-
EZE
20h 49m
2 stops
LATAM Airlines Logo
10:40 pm - 12:34 pm
EZE
-
STL
15h 54m
2 stops
$913LATAM Airlines
Sun, Sep 6 - Mon, Sep 14
LATAM Airlines Logo
7:05 pm - 9:40 am
STL
-
EZE
36h 35m
2 stops
LATAM Airlines Logo
1:10 pm - 6:02 pm
EZE
-
STL
30h 52m
2 stops
$915LATAM Airlines
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
2:57 pm - 8:00 am
STL
-
EZE
15h 03m
1 stop
United Airlines Logo
9:00 pm - 2:08 pm
EZE
-
STL
19h 08m
1 stop
$933United Airlines
Sun, Sep 6 - Mon, Sep 14
United Airlines Logo
6:55 pm - 8:00 am
STL
-
EZE
35h 05m
2 stops
United Airlines Logo
9:00 pm - 12:13 pm
EZE
-
STL
41h 13m
3 stops
$936United Airlines
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
2:57 pm - 8:00 am
STL
-
EZE
15h 03m
1 stop
United Airlines Logo
9:00 pm - 3:38 pm
EZE
-
STL
20h 38m
2 stops
$937United Airlines
Sun, Jun 21 - Sun, Jun 28
Delta Logo
10:51 am - 7:40 am
STL
-
AEP
18h 49m
2 stops
Delta Logo
8:05 pm - 12:34 pm
AEP
-
STL
18h 29m
2 stops
$1,464Delta
Booking Insights

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

Get data-powered insights and trends into flights from St. Louis to Argentina 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 Argentina?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Argentina, 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 Argentina is October, when tickets cost $829 (return) on average. On the other hand, the most expensive months are August and May, when the average cost of round-trip tickets is $1,365 and $1,211 respectively.

Good to know

Low seasonFebruary
Cheapest flight$894
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from St. Louis to Buenos Aires Ministro Pistarini

FAQs - booking Argentina flights

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

    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 Argentina.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Argentina 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 Argentina?

    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 from St. Louis to Argentina with an airline and back with another airline.

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

    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 from St. Louis to Argentina up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from St. Louis to Argentina

 
Need help choosing which airline to fly with from St. Louis to Argentina? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8460 reviews
7.8Entertainment
8.1Boarding
7.2Food
7.9Comfort
8.5Crew
Airline reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

8.0 ExcellentMatthew, May 2026
OKC - ATL
Read more Delta reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Honestly first time flying with delta and it was pretty good. All the process very smooth and crew was always nice and attentive.

Deleted flight made me loose my connection flight now stuck in Atlanta for a day

Apart of Sky miles delta. And they go everywhere in Brazil

Latam wouldn’t tell me how much checked luggage would until I was at the airport and they charged me the highest price possible. Besides that, it was okay.

There was a mechanical issue with the plane that they had to work on before we could take off. That's fine, by all means, PLEASE make sure the mechanics are functioning properly. What was a problem was the fact that we sat on the tarmac for 4.5 hours without moving, without letting us off the plane, and without climate control and air running through the plane. There was no explanation as to what was going on; they just kept promising that it would be "15 minutes, then we are on our way." At one point, they even switched the entire crew out and told everyone we just needed to wait for new employees to show up. Then, as the 4 hours were not moving, an hour before the full refund, they made a big show about "the flight starting and the doors are locked, so you have to sit down." We didn't move for another 40 minutes; they were just trying to skirt around legalities that entitled us to restitution. When the flight finally was underway, the plane was gigantic but cramped in design, my entertainment screen kept freezing and glitching, and subtitles didn't work, and the crew was passive-aggressive. Terrible flight.

We traveled with two young children, and it was not possible for our family to be seated together. No one offered help or assistance to organize seating so we could sit with our kids. In the end, we managed to find two seats in Economy so I could at least sit with one of them, even though I had originally paid for Comfort+. In summary, I had to downgrade my seat just to be able to sit with one of my children, which was very disappointing

I booked a flight through Kayak to Brazil I have traveled to Brazil several times before Kayak Delta or LATAM never mentioned during the booking or in the pre flight process that the visa requirements to visit Brazil have changed earlier this year. I was unaware of this change and as such never got a visa and was unable to fly from JFK to Sao Paulo Add to this that Delta allowed me to fly from Boston to JFK which they should not have as I didn’t have a visa. It has been a terrible experience and a huge loss of money

Good flight, boarding ok and crew very nice. Flight was not full so I was able to be very comfortable. Blanket and pillow provided with was good as it was very cold during the flight . Food was very good(small snack sandwich and an excellent piece of orange cake). Overall good flight, no complaints.

Latam may be the worst airline in the world, far worse than even the lowest of low cost airlines in the USA. I wasted hours trying to PAY THEM TO CHECK A BAG! Then they misled me at the terminal, sent me through the wrong security line, the list goes on and on... Just absolutely terrible in every way. Avoid at all costs.

Poor handling of carry on luggage. We had a 8 hour stop in Santiago, are over 70 and, in spite of paying full fare they wanted to send carry on to luggage hold. No empathy. We had to show that several group 4/5 passengers were not sending their carry ons before they finally let Is keep them. Very poor .

Terrible, horrible, disappointing- without telling us they changed planes and moved and separated our seats to opposite sides - said they changed seats putting us together - got to airport to find no, they did not - we sat opposing sides of plane - food overly salty to inedible, never saw stewardess but once - it was terrible

not sure why you ask about food, I n3ver get food on flights except maybe cookies or pretzels. wifi was slow and in and out most of the flight not good.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

The flight attendant on my side of business class seemed like a novice and did not provide good service. Otherwise the flight was good and the entertainment system was very good. No free WiFi.

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

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

Information on your arrival and departure airports