$497+ Cheap flights from St. Louis (STL) to Argentina
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EZE
Jun 30 — Jul 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Argentina with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Argentina
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to ArgentinaExplore the most affordable flight options available from St. Louis to Argentina. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 31, 2026.
Explore the most affordable flight options available from St. Louis to Argentina. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 31, 2026.
This United Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:15 am
STL
- EZE
1 stop18h 45m
United Airlines
Tue 8/189:00 pm
EZE
- STL
1 stop15h 10m
United Airlines
Deal found 5/27![United Airlines logo]()
$1,147
This LATAM Airlines deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:51 am
STL
- AEP
2 stops21h 09m
LATAM Airlines
Tue 11/175:05 pm
AEP
- STL
2 stops20h 43m
LATAM Airlines
Deal found 5/28![LATAM Airlines logo]()
$1,148
This Delta deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:17 am
STL
- EZE
2 stops18h 53m
Delta
Tue 8/188:10 pm
EZE
- STL
1 stop15h 44m
Delta
Deal found 5/30![Delta logo]()
$1,148
This LATAM Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:00 am
STL
- EZE
2 stops22h 10m
LATAM Airlines
Tue 8/187:35 am
EZE
- STL
3 stops36h 52m
LATAM Airlines
Deal found 5/27![LATAM Airlines logo]()
$1,150
This United Airlines deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:15 am
STL
- EZE
1 stop23h 45m
United Airlines
Thu 10/229:00 pm
EZE
- STL
1 stop27h 30m
United Airlines
Deal found 5/30![United Airlines logo]()
$1,157
This Orbitz deal was found by Cheapflights users on 5/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:13 pm
STL
- EZE
2 stops31h 32m
LATAM Airlines
Sun 12/133:45 pm
EZE
- STL
2 stops28h 21m
LATAM Airlines
Deal found 5/29![LATAM Airlines logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 5/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:15 am
STL
- EZE
1 stop24h 05m
United Airlines
Sun 12/1310:05 pm
EZE
- STL
1 stop14h 37m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,188
This Delta deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:45 pm
STL
- EZE
1 stop13h 00m
Delta
Fri 9/258:10 pm
EZE
- STL
1 stop22h 31m
Delta
Deal found 5/26![Delta logo]()
$1,227
This KAYAK deal was found by Cheapflights users on 5/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:45 pm
STL
- EZE
1 stop13h 00m
LATAM Airlines
Thu 9/243:55 am
EZE
- STL
2 stops21h 41m
LATAM Airlines
Deal found 5/29![LATAM Airlines logo]()
$1,228
This LATAM Airlines deal was found by Cheapflights users on 5/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:59 pm
STL
- EZE
2 stops14h 41m
Multiple Airlines
Fri 9/257:35 am
EZE
- STL
2 stops18h 01m
Multiple Airlines
Deal found 5/29![Multiple Airlines logo]()
$1,232
This Justfly.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:00 am
STL
- AEP
2 stops19h 30m
LATAM Airlines
Tue 8/183:45 pm
AEP
- STL
2 stops20h 09m
LATAM Airlines
Deal found 5/28![LATAM Airlines logo]()
$1,247
This Mytrip deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:15 pm
STL
- AEP
3 stops33h 05m
Multiple Airlines
Tue 11/177:00 am
AEP
- STL
3 stops35h 30m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,290
Best flights from St. Louis to ArgentinaDiscover carefully curated flight deals from St. Louis to Argentina that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 31, 2026.
Discover carefully curated flight deals from St. Louis to Argentina that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 31, 2026.
This United Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:15 am
STL
- EZE
1 stop18h 45m
United Airlines
Tue 8/189:00 pm
EZE
- STL
1 stop15h 10m
United Airlines
Deal found 5/27![United Airlines logo]()
$1,147
This Delta deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:17 am
STL
- EZE
2 stops18h 53m
Delta
Tue 8/188:10 pm
EZE
- STL
1 stop15h 44m
Delta
Deal found 5/30![Delta logo]()
$1,148
This LATAM Airlines deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:23 pm
STL
- EZE
1 stop14h 22m
LATAM Airlines
Tue 8/188:10 pm
EZE
- STL
1 stop13h 58m
LATAM Airlines
Deal found 5/28![LATAM Airlines logo]()
$1,148
This Mytrip deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/112:40 pm
STL
- EZE
3 stops32h 40m
Multiple Airlines
Tue 8/187:10 am
EZE
- STL
3 stops32h 52m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,262
This Delta deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/99:00 am
STL
- EZE
2 stops18h 05m
Delta
Tue 11/179:30 pm
EZE
- STL
1 stop21h 28m
Delta
Deal found 5/28![Delta logo]()
$1,148
This United Airlines deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:15 am
STL
- EZE
1 stop23h 45m
United Airlines
Thu 10/229:00 pm
EZE
- STL
1 stop27h 30m
United Airlines
Deal found 5/30![United Airlines logo]()
$1,157
This Justfly.com deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:00 am
STL
- AEP
2 stops19h 30m
LATAM Airlines
Tue 8/183:45 pm
AEP
- STL
2 stops20h 09m
LATAM Airlines
Deal found 5/28![LATAM Airlines logo]()
$1,247
This Mytrip deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:15 pm
STL
- AEP
3 stops33h 05m
Multiple Airlines
Tue 11/177:00 am
AEP
- STL
3 stops35h 30m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,290
This Delta deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:45 pm
STL
- EZE
1 stop13h 00m
Delta
Fri 9/258:10 pm
EZE
- STL
1 stop22h 31m
Delta
Deal found 5/26![Delta logo]()
$1,227
This KAYAK deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/293:57 pm
STL
- AEP
2 stops22h 03m
LATAM Airlines
Mon 7/68:05 pm
AEP
- STL
2 stops18h 12m
LATAM Airlines
Deal found 5/30![LATAM Airlines logo]()
$1,298
This Delta deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:59 pm
STL
- AEP
2 stops19h 51m
Delta
Fri 9/258:05 pm
AEP
- STL
2 stops20h 44m
Delta
Deal found 5/26![Delta logo]()
$1,335
This LATAM Airlines deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:57 pm
STL
- AEP
2 stops22h 03m
LATAM Airlines
Wed 7/153:45 pm
AEP
- STL
2 stops22h 32m
LATAM Airlines
Deal found 5/30![LATAM Airlines logo]()
$1,338
This Mytrip deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:15 pm
STL
- AEP
3 stops34h 25m
Multiple Airlines
Tue 11/177:00 am
AEP
- STL
3 stops35h 30m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,477
This LATAM Airlines deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:58 pm
STL
- AEP
2 stops20h 02m
LATAM Airlines
Fri 7/173:45 pm
AEP
- STL
2 stops19h 21m
LATAM Airlines
Deal found 5/26![LATAM Airlines logo]()
$1,377
This Mytrip deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:40 am
STL
- AEP
3 stops29h 20m
Multiple Airlines
Tue 6/167:00 am
AEP
- STL
3 stops31h 06m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$1,517
This LATAM Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1610:51 am
STL
- AEP
2 stops27h 09m
LATAM Airlines
Thu 6/183:45 pm
AEP
- STL
2 stops22h 49m
LATAM Airlines
Deal found 5/25![LATAM Airlines logo]()
$1,674
Last-minute flights from St. Louis to ArgentinaDiscover last-minute flight deals from St. Louis to Argentina. Data last updated May 31, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Argentina. Data last updated May 31, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/121:05 pm
STL
- EZE
2 stops33h 20m
Multiple Airlines
Sun 6/144:50 pm
EZE
- STL
3 stops29h 35m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$1,645
This KAYAK deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/123:57 pm
STL
- EZE
2 stops17h 33m
LATAM Airlines
Sun 6/147:35 am
EZE
- STL
2 stops18h 21m
LATAM Airlines
Deal found 5/27![LATAM Airlines logo]()
$1,674
This Mytrip deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/132:15 pm
STL
- EZE
2 stops35h 30m
Multiple Airlines
Tue 6/167:10 am
EZE
- STL
3 stops30h 56m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$1,268
This Mytrip deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:40 am
STL
- AEP
3 stops29h 20m
Multiple Airlines
Tue 6/167:00 am
AEP
- STL
3 stops31h 06m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$1,517
This LATAM Airlines deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1310:16 am
STL
- AEP
2 stops20h 14m
LATAM Airlines
Tue 6/162:55 pm
AEP
- STL
2 stops23h 39m
LATAM Airlines
Deal found 5/30![LATAM Airlines logo]()
$1,653
This Delta deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:00 am
STL
- EZE
2 stops20h 10m
Delta
Tue 6/168:10 pm
EZE
- STL
1 stop15h 36m
Delta
Deal found 5/30![Delta logo]()
$1,743
This LATAM Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/161:39 pm
STL
- AEP
2 stops24h 21m
LATAM Airlines
Thu 6/183:45 pm
AEP
- STL
2 stops20h 01m
LATAM Airlines
Deal found 5/27![LATAM Airlines logo]()
$1,674
This LATAM Airlines deal was found by Cheapflights users on 5/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/163:57 pm
STL
- EZE
2 stops17h 33m
LATAM Airlines
Thu 6/187:35 am
EZE
- STL
3 stops28h 11m
LATAM Airlines
Deal found 5/26![LATAM Airlines logo]()
$1,677
This KAYAK deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/293:57 pm
STL
- AEP
2 stops22h 03m
LATAM Airlines
Mon 7/68:05 pm
AEP
- STL
2 stops18h 12m
LATAM Airlines
Deal found 5/30![LATAM Airlines logo]()
$1,298
This American Airlines deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/291:19 pm
STL
- EZE
1 stop15h 46m
American Airlines
Mon 7/610:00 pm
EZE
- STL
1 stop16h 44m
American Airlines
Deal found 5/30![American Airlines logo]()
$1,298
This Mytrip deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/292:15 pm
STL
- EZE
3 stops35h 30m
Multiple Airlines
Mon 7/67:10 am
EZE
- STL
3 stops32h 52m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$1,569
This Air Canada deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/291:20 pm
STL
- EZE
3 stops47h 10m
Air Canada
Mon 7/64:35 pm
EZE
- STL
2 stops28h 07m
Air Canada
Deal found 5/30![Air Canada logo]()
$1,611
One-way flights from St. Louis to ArgentinaSearch for one-way flight options from St. Louis to Argentina. Find affordable one-way fares based on user searches. Data last updated May 31, 2026.
Search for one-way flight options from St. Louis to Argentina. Find affordable one-way fares based on user searches. Data last updated May 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:09 pm
STL
- AEP
3 stops51h 11m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$497
This Kiwi.com deal was found by Cheapflights users on 5/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:09 pm
STL
- EZE
3 stops57h 51m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$506
Find flight deals from St. Louis to Argentina
Keep the following information in mind while searching for St. Louis to Argentina flight deals. Data was last updated May 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,147 (United Airlines) |
One-way from | $497 (Kiwi.com) |
Popular in | May |
Cheapest in | September |
Average price | $1,645 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Argentina that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 31, 2026.
Use the filters below to find and compare flights from St. Louis to Argentina that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Tue 8/11
11:15 am-8:00 am
1 stop18h 45m
Buenos Aires Ministro Pistarini
Tue 8/18
9:00 pm-10:10 am
1 stop15h 10m
$1,147
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Tue 8/11
9:17 am-6:10 am
2 stops18h 53m
Buenos Aires Ministro Pistarini
Tue 8/18
8:10 pm-9:54 am
1 stop15h 44m
$1,148
Quickest round-trip
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Tue 8/11
5:23 pm-9:45 am
1 stop14h 22m
Buenos Aires Ministro Pistarini
Tue 8/18
8:10 pm-8:08 am
1 stop13h 58m
$1,148
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Mon 11/9
9:00 am-6:05 am
2 stops18h 05m
Buenos Aires Ministro Pistarini
Tue 11/17
9:30 pm-3:58 pm
1 stop21h 28m
$1,148
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Thu 10/15
6:15 am-8:00 am
1 stop23h 45m
Buenos Aires Ministro Pistarini
Thu 10/22
9:00 pm-10:30 pm
1 stop27h 30m
$1,157
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Fri 9/18
6:45 pm-9:45 am
1 stop13h 00m
Buenos Aires Ministro Pistarini
Fri 9/25
8:10 pm-4:41 pm
1 stop22h 31m
$1,227
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Tue 8/11
11:00 am-8:30 am
2 stops19h 30m
Buenos Aires Jorge Newbery
Tue 8/18
3:45 pm-9:54 am
2 stops20h 09m
$1,247
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Tue 8/11
2:40 pm-1:20 am
3 stops32h 40m
Buenos Aires Ministro Pistarini
Tue 8/18
7:10 am-2:02 pm
3 stops32h 52m
$1,262
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Mon 11/9
4:15 pm-4:20 am
3 stops33h 05m
Buenos Aires Jorge Newbery
Tue 11/17
7:00 am-3:30 pm
3 stops35h 30m
$1,290
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Mon 6/29
3:57 pm-4:00 pm
2 stops22h 03m
Buenos Aires Jorge Newbery
Mon 7/6
8:05 pm-12:17 pm
2 stops18h 12m
$1,298
Showing 1-10 of 18 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Argentina
Have a flexible travel schedule? Discover the best time to fly to Argentina from St. Louis with our price prediction graph.
STL-EZE
STL-AEP
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Argentina
STL-AR0
STL-EZE
STL-AEP
What is the cheapest month to book a flight from St. Louis to Argentina?
Currently, October is the cheapest month in which you can book a flight from St. Louis to Argentina (average of $829). Flying from St. Louis to Argentina in August is currently the most expensive (average of $1,365). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Argentina
Get insights into the airlines that provide service to Argentina. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Argentina. Reviews last updated May 31, 2026.
Get a feel of what it's like to fly with Delta,LATAM Airlines, andAmerican Airlines from St. Louis to Argentina by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Overall
7.9
Comfort
7.8
Boarding
8.1
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Overall
7.9
Comfort
7.8
Boarding
8.1
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Overall
7.9
Comfort
7.8
Boarding
8.1
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Overall
7.9
Comfort
7.8
Boarding
8.1
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Argentina. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Alternative routes for St. Louis to Argentina
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Argentina by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Argentina by cabin class
Find flights from St. Louis to Argentina, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Argentina flights
Browse other St. Louis and Argentina flight options. Last updated on May 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from St. Louis to Argentina
Discover the top 2 airlines that operate flights from St. Louis to Argentina. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$884 | Average$1,109 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,025 | Average$1,377 | FlexibilityNo cancel fee | On-timeN/A |