AirHint found the following cheapest return flights from Colorado Springs (COS) to Buenos Aires (EZE) in December 2025 (see full year).

Return flights

01 Dec - 08 Dec	Delta
08 Dec - 23 Dec	American Airlines
07 Dec - 23 Dec	American Airlines
06 Dec - 23 Dec	United
08 Dec - 22 Dec	United
07 Dec - 21 Dec	Delta
06 Dec - 22 Dec	Delta
07 Dec - 22 Dec	United
06 Dec - 21 Dec	Delta

Also check the deals for one-way flights from Colorado Springs to Buenos Aires in December.

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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Cheapest return flights from Colorado Springs to Buenos Aires in December from $1025

Return flights