Cheapest return flights from Boston to Keflavik in August from $233

AirHint found the following cheapest return flights from Boston (BOS) to Keflavik (KEF) in August 2025 (see full year).

Return flights

31 Aug - 11 Sep Fly Play direct
20 Aug - 29 Aug Fly Play direct
24 Aug - 29 Aug Fly Play direct
31 Aug - 05 Sep Fly Play direct
25 Aug - 29 Aug Fly Play direct
26 Aug - 09 Sep Icelandair direct
20 Aug - 13 Sep Icelandair direct
21 Aug - 28 Aug Icelandair direct
19 Aug - 26 Aug Icelandair direct
22 Aug - 27 Aug Icelandair direct
21 Aug - 26 Aug Icelandair direct
28 Aug - 03 Sep Icelandair direct
24 Aug - 27 Aug Icelandair direct
22 Aug - 26 Aug Icelandair direct
20 Aug - 27 Aug Icelandair direct
26 Aug - 03 Sep Icelandair direct
31 Aug - 06 Sep Fly Play direct
31 Aug - 14 Sep Icelandair direct
28 Aug - 12 Sep Icelandair direct
27 Aug - 01 Sep Fly Play direct

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

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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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