$347 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 1/7. 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

Tue, Mar 31 - Tue, Apr 7
LATAM Airlines Logo
10:02 am - 7:40 am
STL
-
AEP
19h 38m2 stops
LATAM Airlines Logo
3:40 pm - 8:52 am
AEP
-
STL
19h 12m2 stops
$1,018LATAM Airlines
Tue, Mar 31 - Mon, Apr 6
LATAM Airlines Logo
5:00 pm - 9:45 am
STL
-
EZE
14h 45m1 stop
LATAM Airlines Logo
3:55 am - 11:42 pm
EZE
-
STL
21h 47m2 stops
$1,018LATAM Airlines
Tue, Mar 31 - Tue, Apr 7
LATAM Airlines Logo
1:00 pm - 8:35 am
STL
-
EZE
17h 35m2 stops
LATAM Airlines Logo
7:35 am - 11:42 pm
EZE
-
STL
18h 07m2 stops
$1,022LATAM Airlines
Mon, Jan 26 - Tue, Feb 3
LATAM Airlines Logo
3:45 pm - 9:00 am
STL
-
EZE
14h 15m1 stop
LATAM Airlines Logo
8:55 pm - 8:53 am
EZE
-
STL
14h 58m1 stop
$1,026LATAM Airlines
Thu, Feb 12 - Thu, Feb 19
LATAM Airlines Logo
11:55 am - 9:35 am
STL
-
EZE
18h 40m2 stops
LATAM Airlines Logo
11:55 pm - 11:02 am
EZE
-
STL
14h 07m1 stop
$1,030LATAM Airlines
Sun, Jan 25 - Mon, Feb 2
Delta Logo
6:57 pm - 9:00 am
STL
-
EZE
35h 03m1 stop
Delta Logo
8:55 pm - 8:53 am
EZE
-
STL
14h 58m1 stop
$1,034Delta
Sun, Feb 8 - Mon, Feb 16
United Airlines Logo
4:35 pm - 7:20 am
STL
-
EZE
35h 45m1 stop
United Airlines Logo
10:05 pm - 9:23 am
EZE
-
STL
14h 18m1 stop
$1,035United Airlines
Sun, Mar 8 - Tue, Mar 17
LATAM Airlines Logo
3:58 pm - 9:35 am
STL
-
EZE
15h 37m2 stops
LATAM Airlines Logo
7:45 am - 11:42 pm
EZE
-
STL
17h 57m2 stops
$1,048LATAM Airlines
Fri, Mar 6 - Sun, Mar 15
Multiple Airlines Logo
4:05 pm - 3:40 pm
STL
-
AEP
20h 35m2 stops
Multiple Airlines Logo
2:55 pm - 3:29 pm
AEP
-
STL
26h 34m2 stops
$1,540Multiple Airlines
Wed, May 27 - Mon, Jun 8
Multiple Airlines Logo
4:05 pm - 1:20 pm
STL
-
AEP
19h 15m2 stops
Multiple Airlines Logo
5:10 pm - 3:16 pm
AEP
-
STL
24h 06m2 stops
$1,814Multiple 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 August, when the average cost of round-trip tickets is $1,473 and $1,423 respectively.

What’s the cheapest day of the week to fly from St. Louis to Argentina?

The average price of all round-trip flights from St. Louis to Argentina clicked on KAYAK for each day over the last 12 months.

For St. Louis to Argentina, Tuesday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Argentina back to St. Louis, the best deals are generally found on Monday, with Sunday being the most expensive.

Good to know

Cheapest flight$347
Flight from St. Louis to Buenos Aires

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.

  • What is the cheapest time of day to fly to Argentina?

    The cheapest time of day to fly to Argentina is generally at night, when round-trip flights cost $1,153 on average. Morning departures are around 9% more expensive than evening flights, on average. The most expensive time of day to fly to Argentina is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,368.

Reviews of the top 4 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 8010 reviews
7.3Food
7.9Comfort
8.5Crew
8.1Boarding
7.9Entertainment
Airline reviews

The food is terrible. The staff is wonderful. Comfort is good.

10.0 ExcellentRonda, Dec 2025
JAX - JFK
Read more Delta reviews

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

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

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

Because the flight was late, we lost the connection to Brazil. You, Delta delayed, and you Delta anticipated the door closing in 15 min from Miami to GRU. Why? It caused a lot of stress! I almost could not see my mother in law alive because of your delay.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Flight and crew were great. United didn't inform crew of immigration process which was disappointing!

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

It was fine. No drinks nor snacks offered though. I thought that was unusual.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

AA delayed the flight for 3 hours and 50 minutes, but delayed the last 2 hours, 30 minutes at a time, so if we knew before, could have stayed at home and worked instead of being at the airport wasting time... The plane's crew was excellent, not their fault.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

RIC Staff was not enough. Elderly passengers had to wait 30 minutes to deplane, so we could board and still had to walk as no chairs were provided. And, passenger in front of my seat assignment rammed seat against my legs entire flight time. Was mildly bruised and left thigh still sore.

Liked that it was on time. Staff professional and friendly.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

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

Information on your arrival and departure airports