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

Return flights

22 Feb - 28 Feb	British Airways
28 Feb - 09 Mar	British Airways
28 Feb - 09 Mar	Icelandair	direct
13 Feb - 22 Feb	Icelandair	direct
22 Feb - 28 Feb	Icelandair	direct
10 Feb - 17 Feb	Icelandair	direct
20 Feb - 27 Feb	Icelandair	direct

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

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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Cheapest return flights from Seattle to Keflavik in February from $655

Return flights