Cheapest return flights from Seattle to Keflavik in March from 501€

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

Return flights

24 Mar - 31 Mar Icelandair direct
22 Mar - 29 Mar Icelandair direct
04 Mar - 11 Mar Lufthansa
16 Mar - 26 Mar Lufthansa
20 Mar - 27 Mar Icelandair direct
05 Mar - 12 Mar Lufthansa
03 Mar - 10 Mar Icelandair direct
10 Mar - 17 Mar Icelandair direct
19 Mar - 26 Mar Icelandair direct
02 Mar - 09 Mar Icelandair direct
18 Mar - 11 Apr Icelandair direct

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

Powered by

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.