$506 Find Cheap Flights from St. Louis to Argentina

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 Argentina departing on 2/5. 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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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

Tue, Mar 10 - Tue, Mar 24
LATAM Airlines Logo
12:04 pm - 9:00 am
STL
-
EZE
18h 56m1 stop
LATAM Airlines Logo
8:55 pm - 9:05 am
EZE
-
STL
14h 10m1 stop
$935LATAM Airlines
Tue, Mar 10 - Tue, Mar 24
LATAM Airlines Logo
6:59 pm - 5:00 pm
STL
-
AEP
20h 01m2 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m2 stops
$937LATAM Airlines
Tue, Mar 10 - Tue, Mar 24
Delta Logo
10:50 am - 10:15 am
STL
-
EZE
21h 25m2 stops
Delta Logo
10:25 pm - 4:32 pm
EZE
-
STL
20h 07m2 stops
$941Delta
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
12:04 pm - 9:00 am
STL
-
EZE
18h 56m1 stop
LATAM Airlines Logo
8:55 pm - 5:53 pm
EZE
-
STL
22h 58m1 stop
$976LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
7:03 am - 7:20 am
STL
-
EZE
22h 17m1 stop
LATAM Airlines Logo
8:55 pm - 11:09 am
EZE
-
STL
16h 14m1 stop
$977LATAM Airlines
Tue, Mar 24 - Thu, Apr 2
LATAM Airlines Logo
12:04 pm - 6:05 am
STL
-
EZE
16h 01m2 stops
LATAM Airlines Logo
4:45 pm - 5:53 pm
EZE
-
STL
27h 08m2 stops
$980LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m2 stops
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m1 stop
$1,003United Airlines
Tue, Mar 24 - Thu, Apr 2
American Airlines Logo
11:22 am - 8:00 am
STL
-
EZE
18h 38m1 stop
American Airlines Logo
11:30 pm - 5:40 pm
EZE
-
STL
20h 10m1 stop
$1,022American Airlines
Thu, Apr 30 - Mon, May 4
Air Canada Logo
4:05 pm - 2:30 pm
STL
-
EZE
44h 25m3 stops
Air Canada Logo
4:35 pm - 8:05 pm
EZE
-
STL
29h 30m2 stops
$1,082Air Canada
Thu, Apr 30 - Mon, May 4
Air Canada Logo
4:05 pm - 2:30 pm
STL
-
EZE
44h 25m3 stops
Air Canada Logo
4:35 pm - 8:04 pm
EZE
-
STL
53h 29m3 stops
$1,090Air Canada
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 September, when tickets cost $1,056 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,473 and $1,431 respectively.

Good to know

Cheapest flight$518
Flight from St. Louis to Buenos Aires Jorge Newbery

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 8029 reviews
8.5Crew
7.2Food
8.1Boarding
7.9Comfort
7.8Entertainment
Airline reviews

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

2.0 MediocreWilliam, Jan 2026
LGA - BOS
Read more Delta reviews

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

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 .

The flight was late. Please do not delay next time.

I couldn't travel, now I can't get a refund and to change the date I have to pay an absurd fine.

Boarding was confusing with a delayed flight because there was no English translation

My biggest complaint is the comfort. I am not tall and there was no legroom. It was very uncomfortable. During my transfer in Sao Paola, the flight was slightly delayed so boarding was confusing because there were no instructions in English.

Horrible the worst airlines I have ever flown. Cancelled flight with no choices and when contacted them they were not helpful

Good food & refreshment. The seats and entrainment screens are modern compared to others. The staff though pleasant serve and attend to passengers based on nationality. Some get served first others last regardless of their seating positions.

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

The flight was on time and arrived early. The crew were friendly and helpful.

My carry on baggage was damaged. Entire trip, I had to carry the baggage. When complained to the boarding crew, they got mad at me and still asked me to valet check in the cabin baggage. Rude boarding crew!!!

The economy seats are very cramped and the food was bizarre. However, I did like the greek yogurt option for breakfast.

While I didn’t watch much tv I would have liked a few more options of TV series from Apple TV or hbo max ..

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Nothing to write home about, average flight experience. Seats were spacious enough, crew friendly enough. Loved the AA entertainment/wifi service.

Kayak was among the missing. There was not the usual advice regarding next gate after arriving in Dallas. No communication after the reminder to check in before the Moline flight. What happened?

They should have allowed for extra time to de-ice the plane before boarding passengers. This delayed us about 10-15 mins after we boarded. Overall experience was fine. Crew was friendly and on top of everything. We didn’t have any issues during the flight.

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

Information on your arrival and departure airports