Cheapest return flights from Boston to Keflavik in August from $257

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

Return flights

27 Aug - 31 Aug Fly Play direct
25 Aug - 31 Aug Fly Play direct
22 Aug - 29 Aug Fly Play direct
22 Aug - 27 Aug Fly Play direct
08 Aug - 18 Aug Fly Play direct
17 Aug - 25 Aug Fly Play direct
11 Aug - 18 Aug Fly Play direct
13 Aug - 20 Aug Fly Play direct
10 Aug - 20 Aug Fly Play direct
21 Aug - 26 Aug Icelandair direct
27 Aug - 03 Sep Icelandair direct
29 Aug - 05 Sep Icelandair direct
27 Aug - 02 Sep Icelandair direct
30 Aug - 04 Sep Icelandair direct
30 Aug - 07 Sep Icelandair direct
28 Aug - 03 Sep Icelandair direct
31 Aug - 04 Sep Icelandair direct
30 Aug - 18 Sep Icelandair direct
31 Aug - 05 Sep Icelandair direct
29 Aug - 01 Sep Icelandair 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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