Cheapest return flights from Boston to Keflavik in August from $358

Best time to book flights for Boston (BOS) to Keflavik (KEF) flights at AirHint

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

Return flights

29 Aug - 12 Sep Fly Play direct
14 Aug - 19 Aug Fly Play direct
14 Aug - 18 Aug Fly Play direct
21 Aug - 27 Aug Fly Play direct
30 Aug - 12 Sep Fly Play direct
29 Aug - 02 Sep Fly Play direct
07 Aug - 18 Aug Fly Play direct
29 Aug - 03 Sep Fly Play direct
28 Aug - 02 Sep Fly Play direct
02 Aug - 06 Aug Fly Play direct
17 Aug - 21 Aug Fly Play direct
20 Aug - 24 Aug Fly Play direct
06 Aug - 16 Aug Fly Play direct
04 Aug - 11 Aug Fly Play direct
08 Aug - 17 Aug Icelandair direct
29 Aug - 04 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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