Cheapest one-way flights from Chicago to Buenos Aires in December from 288€

AirHint found the following cheapest one-way flights from Chicago (ORD) to Buenos Aires (AEP) in December 2025 (see full year).

One-Way flights

08 Dec Spirit Airlines
29 Dec Frontier Airlines
28 Dec Spirit Airlines
25 Dec Spirit Airlines
04 Dec LATAM Airlines Group
07 Dec LATAM Airlines Group
13 Dec LATAM Airlines Group
15 Dec LATAM Airlines Group
16 Dec LATAM Airlines Group
22 Dec LATAM Airlines Group

Also check the deals for return flights from Chicago to Buenos Aires in December.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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