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Cheapest one-way flights from Seattle (SEA) to Keflavik (KEF), October

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Dates, airline, and price
Dates	Airline	Price
06 Oct	Alaska Airlines
18 Oct	Alaska Airlines
09 Oct	WestJet
15 Oct	Lufthansa
15 Oct	Icelandair Direct Flight
18 Oct	Icelandair Direct Flight
09 Oct	Icelandair Direct Flight

deals for return flights from Seattle to Keflavik in October.

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Updated Jul 19, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Seattle (SEA) to Keflavik (KEF), October

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