Cheapest return flights from Boston to Keflavik in September from 261€

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 September 2025 (see full year).

Return flights

08 Sep - 15 Sep Fly Play direct
04 Sep - 11 Sep Fly Play direct
01 Sep - 11 Sep Fly Play direct
02 Sep - 09 Sep Fly Play direct
10 Sep - 17 Sep Fly Play direct
09 Sep - 16 Sep Fly Play direct
05 Sep - 15 Sep Fly Play direct
09 Sep - 19 Sep Fly Play direct
14 Sep - 24 Sep Fly Play direct
28 Sep - 08 Oct Fly Play direct
24 Sep - 01 Oct Fly Play direct
30 Sep - 08 Oct Fly Play direct
27 Sep - 07 Oct Fly Play direct
06 Sep - 15 Sep Fly Play direct
28 Sep - 06 Oct Fly Play direct
21 Sep - 01 Oct Fly Play direct
24 Sep - 04 Oct Fly Play direct
26 Sep - 04 Oct Fly Play direct
25 Sep - 05 Oct Fly Play direct
25 Sep - 02 Oct Fly Play direct

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

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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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