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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 March , April 2026

29 Mar - 18 Apr $ 852.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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31 Mar - 18 Apr $ 860.00
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 Mar - 18 Apr $ 867.00
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

29 Mar - 01 Apr $ 1,038.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
3 STOPS
STL
St Louis
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29 Mar - 01 Apr $ 1,051.00
STL
St Louis
Frontier Airlines
3 STOPS
AEP
Buenos Aires
AEP
Buenos Aires
Frontier Airlines
2 STOPS
STL
St Louis
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28 Mar - 01 Apr $ 1,092.00
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

7:52 AM - 9:12 AM
JetSMART
3 Stops
25h 28m
STL - AEP
$ 416
Kiwi
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4:51 PM - 7:12 PM
JetSMART
3 Stops
26h 29m
STL - AEP
$ 423
Kiwi
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4:51 PM - 6:35 PM
Sky Airline
3 Stops
25h 49m
STL - AEP
$ 431
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.