Cheapest return flights from Seattle to Keflavik in March from $474

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

Return flights

25 Mar - 01 Apr Icelandair direct
02 Mar - 09 Mar Icelandair direct
30 Mar - 06 Apr Icelandair direct
29 Mar - 05 Apr Icelandair direct
07 Mar - 14 Mar Icelandair direct
03 Mar - 10 Mar Icelandair direct
05 Mar - 12 Mar Icelandair direct
10 Mar - 17 Mar Icelandair direct
24 Mar - 31 Mar Icelandair direct
31 Mar - 07 Apr Icelandair direct
29 Mar - 04 Apr Icelandair direct
17 Mar - 24 Mar Icelandair direct
26 Mar - 02 Apr Icelandair direct
04 Mar - 11 Mar Icelandair direct
09 Mar - 16 Mar Icelandair direct
11 Mar - 18 Mar Icelandair direct
28 Mar - 04 Apr Icelandair direct
27 Mar - 03 Apr Icelandair direct

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

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