AirHint found the following cheapest one-way flights from Oakland (OAK) to Portland (PDX) in December 2025 (see full year).

One-Way flights

06 Dec	Alaska Airlines	direct
25 Dec	Alaska Airlines	direct
05 Dec	Alaska Airlines	direct
18 Dec	Alaska Airlines	direct
01 Dec	Alaska Airlines	direct
22 Dec	Alaska Airlines	direct
30 Dec	Alaska Airlines	direct
21 Dec	Alaska Airlines	direct
26 Dec	Alaska Airlines
26 Dec	Alaska Airlines	direct

Also check the deals for return flights from Oakland 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.

Book a cheap hotel in Portland

Cheap car rent in Portland

Cheapest one-way flights from Oakland to Portland in December from $48

One-Way flights