Cheapest return flights from Boston to Keflavik in August from $354

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

22 Aug - 01 Sep Fly Play direct
18 Aug - 22 Aug Fly Play direct
18 Aug - 29 Aug Fly Play direct
13 Aug - 24 Aug SWISS
17 Aug - 25 Aug Fly Play direct
15 Aug - 23 Aug Air Canada
29 Aug - 06 Sep Fly Play direct
31 Aug - 08 Sep Fly Play direct
29 Aug - 01 Sep Fly Play direct
15 Aug - 22 Aug Air Canada
22 Aug - 24 Aug Fly Play direct
13 Aug - 24 Aug Fly Play direct
13 Aug - 21 Aug Air Canada
10 Aug - 15 Aug Fly Play direct
22 Aug - 21 Sep Air Canada
29 Aug - 02 Sep Icelandair direct
30 Aug - 06 Sep Icelandair direct
28 Aug - 02 Sep Icelandair direct
22 Aug - 21 Sep Icelandair direct
28 Aug - 05 Sep Icelandair direct

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

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik