Cheapest return flights from Seattle to Buenos Aires in December from $946

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

Return flights

07 Dec - 13 Dec Hawaiian Airlines
04 Dec - 15 Dec American Airlines
11 Dec - 31 Dec Frontier Airlines
23 Dec - 30 Dec Hawaiian Airlines
20 Dec - 30 Dec Hawaiian Airlines
22 Dec - 02 Jan Hawaiian Airlines

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

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