Cheapest return flights from Portland to Keflavik in March from $668

AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in March 2026 (see full year).

Return flights

30 Mar - 06 Apr Icelandair direct
16 Mar - 23 Mar Icelandair direct
09 Mar - 16 Mar Icelandair direct
23 Mar - 30 Mar Icelandair direct
02 Mar - 09 Mar Southwest Airlines
27 Mar - 03 Apr Southwest Airlines
01 Mar - 08 Mar Alaska Airlines
11 Mar - 18 Mar Alaska Airlines
10 Mar - 17 Mar Icelandair
04 Mar - 11 Mar Alaska Airlines
15 Mar - 22 Mar Alaska Airlines
24 Mar - 31 Mar Icelandair
31 Mar - 07 Apr Icelandair
25 Mar - 01 Apr Alaska Airlines
29 Mar - 05 Apr Alaska Airlines
26 Mar - 02 Apr Icelandair
28 Mar - 04 Apr Icelandair

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

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