Cheapest return flights from Boston to Keflavik in September from 202€

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

Return flights

05 Sep - 11 Sep Fly Play direct
06 Sep - 11 Sep Fly Play direct
01 Sep - 11 Sep Fly Play direct
03 Sep - 10 Sep Fly Play direct
08 Sep - 10 Sep Fly Play direct
28 Sep - 05 Oct Icelandair direct
10 Sep - 17 Sep Icelandair direct
04 Sep - 08 Sep Icelandair direct
03 Sep - 08 Sep Fly Play direct
10 Sep - 13 Sep Icelandair direct
05 Sep - 08 Sep Fly Play direct
30 Sep - 07 Oct Icelandair direct
20 Sep - 11 Oct Icelandair direct
15 Sep - 11 Oct Icelandair direct
29 Sep - 06 Oct Icelandair direct
13 Sep - 04 Oct Icelandair direct
27 Sep - 04 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct
24 Sep - 01 Oct Icelandair direct
29 Sep - 03 Oct Icelandair 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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