Cheapest return flights from Portland to Buenos Aires in December from 760€

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

Return flights

08 Dec - 15 Dec Frontier Airlines
04 Dec - 28 Dec Frontier Airlines
04 Dec - 31 Dec Frontier Airlines
27 Dec - 10 Jan Frontier Airlines
14 Dec - 30 Dec Hawaiian Airlines
25 Dec - 08 Jan Frontier Airlines
29 Dec - 05 Jan Hawaiian Airlines
22 Dec - 06 Jan Hawaiian Airlines

Also check the deals for one-way flights from Portland 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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