$525 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 4/30. 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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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

Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m
2 stops
United Airlines Logo
9:05 pm - 9:21 am
EZE
-
STL
14h 16m
1 stop
$977United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
6:59 pm - 9:30 pm
STL
-
AEP
24h 31m
2 stops
LATAM Airlines Logo
5:15 pm - 11:09 am
AEP
-
STL
19h 54m
2 stops
$1,014LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
4:21 pm - 7:20 am
STL
-
EZE
12h 59m
1 stop
LATAM Airlines Logo
8:55 pm - 5:53 pm
EZE
-
STL
22h 58m
1 stop
$1,014LATAM Airlines
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
7:41 am - 8:20 am
STL
-
EZE
46h 39m
2 stops
United Airlines Logo
9:05 pm - 2:42 pm
EZE
-
STL
19h 37m
2 stops
$1,023United Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
4:21 pm - 7:20 am
STL
-
EZE
12h 59m
1 stop
LATAM Airlines Logo
7:35 am - 5:53 pm
EZE
-
STL
36h 18m
2 stops
$1,092LATAM Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
6:04 am - 9:35 am
STL
-
EZE
25h 31m
2 stops
LATAM Airlines Logo
3:45 pm - 9:05 am
EZE
-
STL
43h 20m
2 stops
$1,101LATAM Airlines
Thu, Apr 30 - Mon, May 4
LATAM Airlines Logo
4:43 pm - 6:40 pm
STL
-
AEP
23h 57m
2 stops
LATAM Airlines Logo
5:05 pm - 10:34 am
AEP
-
STL
19h 29m
2 stops
$1,103LATAM Airlines
Thu, Apr 30 - Sun, May 3
LATAM Airlines Logo
9:40 am - 6:20 am
STL
-
EZE
18h 40m
2 stops
LATAM Airlines Logo
3:45 pm - 5:54 pm
EZE
-
STL
28h 09m
2 stops
$1,103LATAM Airlines
Fri, Mar 27 - Sun, Apr 5
LATAM Airlines Logo
12:04 pm - 7:20 am
STL
-
EZE
17h 16m
1 stop
LATAM Airlines Logo
8:10 pm - 11:09 am
EZE
-
STL
16h 59m
1 stop
$1,133LATAM Airlines
Sat, Apr 25 - Thu, Apr 30
LATAM Airlines Logo
9:40 am - 7:40 am
STL
-
AEP
20h 00m
2 stops
LATAM Airlines Logo
3:40 pm - 8:30 am
AEP
-
STL
18h 50m
2 stops
$1,135LATAM Airlines
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 January, when the average cost of round-trip tickets is $1,473 and $1,410 respectively.

Good to know

Cheapest flight$525
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 8042 reviews
7.2Food
7.9Comfort
8.1Boarding
8.5Crew
7.8Entertainment
Airline reviews

It was good because we traveled without luggage, carry on only.

8.0 ExcellentAnonymous, Jan 2026
ATL - EWR
Read more Delta reviews

It was good because we traveled without luggage, carry on only.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

The entertainment screens were not working and there was no air condition the entire flight. Very uncomfortable.

I have diamond medallion status and usually we are in comfort plus . We were in main this time ( which was fine ) and my husband wanted wine . I have at least 10 vouchers for drinks that are good for this year and next! The attendant would not take the picture of the voucher as proof and never came back to check as She asked me to pull it up on delta Wi-Fi. Instead my husband just used his Amex to buy the wine . Disappointing!!!

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

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.

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

The professionals have excellent customer service, the seats don´t have enough space.

We were upgraded to First Class and it was a great flight

Amazing I love American. I’ll never fly anyone else if I can help it.

I love American. I’ll never fly anyone else if I can help it.

Flight delay and multiple gate changes including a change near boarding time to another terminal, which in DFW is a pain. Pre-boarding delay and also a further delay on the ground after boarding. About an hour and a half total delay.

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

Little warm on the plane and delayed for an hour

Tell the crew (when boarding) to yell at the imbeciles blocking us from walking up to scan. I promise everyone crowds around and half of us (most the time I’m group 4) have to push our way through. Your staff is awesome, the public - not so much-

Bags took over and hour to come out. Delays due to wind caused rebooking.

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

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

Information on your arrival and departure airports