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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 September , October 2026

28 Sep - 30 Oct $ 1,215.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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28 Sep - 21 Oct $ 1,323.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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30 Sep - 21 Oct $ 1,329.00
STL
St Louis
Frontier Airlines
3 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

28 Sep - 01 Oct $ 1,582.00
STL
St Louis
Air Canada
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Air Canada
3 STOPS
STL
St Louis
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28 Sep - 01 Oct $ 1,683.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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28 Sep - 01 Oct $ 1,694.00
STL
St Louis
Frontier Airlines
3 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

2:30 PM - 10:58 PM
JetSMART
3 Stops
31h 46m
STL - AEP
$ 694
Kiwi
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2:30 PM - 11:33 PM
JetSMART
3 Stops
32h 21m
STL - AEP
$ 700
Kiwi
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2:30 PM - 9:05 PM
Aerolineas Argentinas
3 Stops
29h 55m
STL - AEP
$ 742
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.