Cheapest return flights from Seattle to Keflavik in April from 506€

Best time to book flights for Seattle (SEA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF) in April 2025 (see full year).

Return flights

17 Apr - 24 Apr Icelandair direct
18 Apr - 25 Apr Icelandair direct
21 Apr - 28 Apr Icelandair direct
22 Apr - 29 Apr Icelandair direct
23 Apr - 30 Apr Icelandair direct
02 Apr - 09 Apr British Airways
24 Apr - 01 May Icelandair direct
29 Apr - 06 May Icelandair direct
13 Apr - 27 Apr Icelandair direct
16 Apr - 25 Apr Icelandair direct
19 Apr - 25 Apr Icelandair direct
26 Apr - 06 May Icelandair direct
21 Apr - 07 May Icelandair direct
30 Apr - 11 May Icelandair direct
27 Apr - 12 May Icelandair direct
27 Apr - 08 May Icelandair direct
24 Apr - 05 May Icelandair direct
30 Apr - 08 May Icelandair direct
30 Apr - 06 May Icelandair direct
01 Apr - 07 Apr Delta

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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