Cheapest return flights from Seattle to Keflavik in March from 441€

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

Return flights

05 Mar - 12 Mar Lufthansa
21 Mar - 05 Apr Lufthansa
06 Mar - 13 Mar Icelandair direct
07 Mar - 14 Mar British Airways
07 Mar - 14 Mar Icelandair direct
05 Mar - 12 Mar Icelandair direct
03 Mar - 10 Mar Icelandair direct
21 Mar - 05 Apr Icelandair direct

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

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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