Cheapest return flights from Seattle to Keflavik in April from 630€

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

Return flights

06 Apr - 11 Apr Icelandair direct
02 Apr - 09 Apr Icelandair direct

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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