Cheapest return flights from Seattle to Keflavik in April from 396€

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

Return flights

21 Apr - 28 Apr Icelandair direct
22 Apr - 29 Apr Icelandair direct
23 Apr - 30 Apr Icelandair direct
07 Apr - 17 Apr Delta
06 Apr - 13 Apr Delta
25 Apr - 02 May Air France
06 Apr - 13 Apr Icelandair direct
12 Apr - 19 Apr Icelandair direct
24 Apr - 01 May Icelandair direct
02 Apr - 09 Apr Icelandair direct
25 Apr - 02 May Icelandair direct
10 Apr - 14 Apr Icelandair direct
05 Apr - 12 Apr Icelandair direct
30 Apr - 07 May Icelandair direct

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

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