Cheapest return flights from Portland to Keflavik in March from $469

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

Return flights

28 Mar - 06 Apr Icelandair direct
10 Mar - 18 Mar Icelandair direct
28 Mar - 05 Apr Icelandair direct
28 Mar - 03 Apr Icelandair direct
28 Mar - 01 Apr Icelandair direct
07 Mar - 15 Mar Icelandair direct
28 Mar - 02 Apr Icelandair
11 Mar - 18 Mar Alaska Airlines
28 Mar - 31 Mar Alaska Airlines
28 Mar - 30 Mar Icelandair direct
28 Mar - 29 Mar Icelandair
28 Mar - 29 Mar Icelandair direct
21 Mar - 30 Mar Hawaiian Airlines
21 Mar - 30 Mar Icelandair direct

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

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