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

Return flights

10 Nov - 17 Nov	Icelandair	direct
17 Nov - 24 Nov	Icelandair	direct
03 Nov - 10 Nov	Icelandair	direct
29 Nov - 03 Dec	Icelandair	direct
27 Nov - 04 Dec	Icelandair
16 Nov - 23 Nov	Southwest Airlines
18 Nov - 25 Nov	Icelandair
05 Nov - 12 Nov	Southwest Airlines
12 Nov - 19 Nov	Southwest Airlines
14 Nov - 21 Nov	Southwest Airlines
19 Nov - 26 Nov	Alaska Airlines
26 Nov - 03 Dec	Sun Country Airlines
01 Nov - 08 Nov	Icelandair
29 Nov - 06 Dec	Icelandair
28 Nov - 05 Dec	Southwest Airlines
30 Nov - 07 Dec	Alaska Airlines
24 Nov - 01 Dec	Icelandair	direct
25 Nov - 02 Dec	Icelandair

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

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 Portland to Keflavik in November from $416

Return flights