Cheapest return flights from Keflavik to Boston in September from $230

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

Return flights

11 Sep - 11 Sep Fly Play direct
11 Sep - 15 Sep Fly Play direct
01 Sep - 03 Sep Fly Play direct
11 Sep - 20 Sep Fly Play
12 Sep - 16 Sep Fly Play
19 Sep - 22 Sep Fly Play
11 Sep - 20 Sep Fly Play direct
29 Sep - 03 Oct Icelandair direct
18 Sep - 21 Sep Fly Play
12 Sep - 16 Sep Icelandair direct
18 Sep - 21 Sep Icelandair direct

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

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.

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