Cheapest return flights from Seattle to Keflavik in May from 548€

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 May 2025 (see full year).

Return flights

05 May - 13 May Icelandair direct
06 May - 14 May Icelandair direct
15 May - 23 May Icelandair direct
21 May - 29 May Icelandair direct
12 May - 23 May Icelandair direct
18 May - 29 May Icelandair direct
03 May - 14 May Icelandair direct
07 May - 15 May Icelandair direct
08 May - 16 May Icelandair direct
02 May - 10 May Icelandair direct
27 May - 07 Jun Icelandair direct
27 May - 04 Jun Icelandair direct
21 May - 01 Jun Icelandair direct
24 May - 01 Jun Icelandair direct
29 May - 06 Jun Icelandair direct
30 May - 07 Jun Icelandair direct
25 May - 02 Jun Air France
26 May - 02 Jun Icelandair direct
25 May - 01 Jun Icelandair direct
28 May - 04 Jun Icelandair direct

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

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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