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Cheap flights from St Louis (STL) to Buenos Aires (AEP)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)

How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)
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How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)
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How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)
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Cheap flights from St Louis to Buenos Aires in April , May 2026

29 Apr - 05 May $ 951.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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29 Apr - 12 May $ 952.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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29 Apr - 28 May $ 966.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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Last minute flights from St Louis to Buenos Aires

29 Apr - 01 May $ 1,168.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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29 Apr - 01 May $ 1,171.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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29 Apr - 01 May $ 1,200.00
STL
St Louis
Frontier Airlines
2 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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One-way flights to Buenos Aires from St Louis

8:23 PM - 2:00 AM
Sky Airline
3 Stops
34h 7m
STL - AEP
$ 398
Kiwi
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6:00 AM - 9:15 PM
Avianca
2 Stops
21h 40m
STL - AEP
$ 457
Kiwi
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11:21 AM - 9:30 AM
LATAM Airlines
3 Stops
26h 39m
STL - AEP
$ 509
Kiwi
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How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Buenos Aires (AEP)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.