Cheapest return flights from Portland to Keflavik in December from 719€

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

Return flights

15 Dec - 10 Jan Icelandair
04 Dec - 09 Dec Hawaiian Airlines
06 Dec - 11 Dec Hawaiian Airlines
01 Dec - 27 Dec Icelandair
22 Dec - 26 Dec Icelandair
22 Dec - 01 Jan Hawaiian Airlines
22 Dec - 01 Jan Icelandair direct
29 Dec - 02 Jan Icelandair

Also check the deals for one-way flights from Portland to Keflavik in December.

Powered by

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 Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.