Cheapest return flights from Seattle to Keflavik in April from 370€

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

Return flights

15 Apr - 25 Apr Icelandair direct
22 Apr - 02 May Icelandair direct
10 Apr - 17 Apr KLM
11 Apr - 18 Apr KLM
07 Apr - 17 Apr Icelandair direct
06 Apr - 12 Apr Icelandair direct
08 Apr - 18 Apr Icelandair direct
01 Apr - 11 Apr Icelandair direct
06 Apr - 08 Apr Icelandair direct

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

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