Cheapest return flights from Seattle to Keflavik in March from 417€

Best time to book flights for Seattle (SEA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF) in March 2025 (see full year).

Return flights

03 Mar - 11 Mar Spirit Airlines
04 Mar - 11 Mar Alaska Airlines
03 Mar - 12 Mar Alaska Airlines
18 Mar - 26 Mar jetBlue
02 Mar - 10 Mar Alaska Airlines
25 Mar - 02 Apr Spirit Airlines
26 Mar - 02 Apr Spirit Airlines
28 Mar - 05 Apr jetBlue
24 Mar - 01 Apr jetBlue
31 Mar - 08 Apr jetBlue
31 Mar - 07 Apr jetBlue
28 Mar - 04 Apr jetBlue
27 Mar - 03 Apr jetBlue
18 Mar - 25 Mar Spirit Airlines
10 Mar - 17 Mar Alaska Airlines
09 Mar - 17 Mar jetBlue
10 Mar - 18 Mar Alaska Airlines
31 Mar - 06 Apr jetBlue
27 Mar - 04 Apr jetBlue
19 Mar - 26 Mar jetBlue

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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