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

Return flights

22 Oct - 29 Oct	Icelandair	direct
14 Oct - 22 Oct	Icelandair	direct
16 Oct - 20 Oct	Icelandair	direct
19 Oct - 24 Oct	Icelandair	direct
20 Oct - 29 Oct	Icelandair	direct
14 Oct - 19 Oct	Icelandair	direct
16 Oct - 19 Oct	Icelandair	direct
12 Oct - 17 Oct	Icelandair	direct
01 Oct - 05 Oct	Icelandair	direct
19 Oct - 23 Oct	Icelandair	direct
26 Oct - 01 Nov	Icelandair	direct
30 Oct - 03 Nov	Icelandair	direct

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

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

Cheapest return flights from Boston to Keflavik in October from $275

Return flights