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

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Dates, airline, and price
Dates	Airline	Price
27 Aug	Frontier Airlines
22 Aug	WestJet
13 Aug	WestJet
19 Aug	WestJet
17 Aug	Alaska Airlines
02 Aug	Alaska Airlines
22 Aug	Icelandair Direct Flight
17 Aug	Icelandair Direct Flight
27 Aug	Icelandair Direct Flight
19 Aug	Icelandair Direct Flight

deals for return flights from Seattle to Keflavik in August.

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Updated Jul 18, 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), August

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