AirHint found the following cheapest one-way flights from Chicago (ORD) to Buenos Aires (AEP) in December 2025 (see full year).
One-Way flights
| 24 Dec | Spirit Airlines | ||
| 04 Dec | Spirit Airlines | ||
| 23 Dec | Frontier Airlines | ||
| 14 Dec | Frontier Airlines | ||
| 02 Dec | LATAM Airlines Group | ||
| 07 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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