Cheapest return flights from Boston to Keflavik in September from 270€

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

Return flights

06 Sep - 11 Sep Fly Play direct
28 Sep - 05 Oct Icelandair direct
09 Sep - 15 Sep Icelandair direct
13 Sep - 15 Sep Icelandair direct
22 Sep - 29 Sep Icelandair direct
04 Sep - 11 Sep Icelandair direct
10 Sep - 17 Sep Icelandair direct
16 Sep - 23 Sep Icelandair direct
14 Sep - 18 Sep Icelandair direct
10 Sep - 22 Sep Icelandair direct
01 Sep - 08 Sep Icelandair direct
25 Sep - 02 Oct Icelandair direct
23 Sep - 04 Oct United

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