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

Return flights

19 Dec - 28 Dec	Alaska Airlines	direct
19 Dec - 22 Dec	Alaska Airlines	direct
19 Dec - 23 Dec	Alaska Airlines	direct
19 Dec - 21 Dec	Alaska Airlines
19 Dec - 26 Dec	Delta
19 Dec - 27 Dec	Delta
19 Dec - 02 Jan	Delta
19 Dec - 20 Dec	Alaska Airlines
19 Dec - 25 Dec	Alaska Airlines
19 Dec - 19 Dec	Alaska Airlines
06 Dec - 11 Dec	Aeromexico

Also check the deals for one-way flights from Eugene to Portland 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 Eugene to Portland in December from 194€

Return flights