Cheapest return flights from Boston to Keflavik in March from $331

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

Return flights

28 Mar - 04 Apr Icelandair direct
15 Mar - 19 Mar Icelandair direct
23 Mar - 27 Mar Icelandair direct
28 Mar - 03 Apr Icelandair direct
08 Mar - 12 Mar Icelandair direct
10 Mar - 17 Mar Icelandair direct
18 Mar - 25 Mar Icelandair direct
24 Mar - 31 Mar Icelandair direct
23 Mar - 30 Mar Icelandair direct
25 Mar - 01 Apr Icelandair direct
30 Mar - 06 Apr Icelandair direct
31 Mar - 07 Apr Icelandair direct
26 Mar - 31 Mar Icelandair direct
26 Mar - 30 Mar Icelandair direct
05 Mar - 10 Mar Icelandair direct
31 Mar - 05 Apr Icelandair direct
26 Mar - 02 Apr Icelandair direct

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

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