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

Return flights

14 Oct - 16 Oct	Fly Play	direct
14 Oct - 19 Oct	Fly Play	direct
14 Oct - 18 Oct	Fly Play	direct
09 Oct - 16 Oct	Fly Play	direct
09 Oct - 14 Oct	Fly Play	direct
07 Oct - 14 Oct	Fly Play	direct
08 Oct - 14 Oct	Fly Play	direct
14 Oct - 20 Oct	Fly Play	direct
02 Oct - 16 Oct	Fly Play	direct
08 Oct - 19 Oct	Fly Play	direct
31 Oct - 06 Nov	Fly Play
29 Oct - 06 Nov	easyJet
31 Oct - 08 Nov	Fly Play
31 Oct - 04 Nov	Fly Play
29 Oct - 04 Nov	easyJet
28 Oct - 06 Nov	Fly Play
28 Oct - 07 Nov	Fly Play
29 Oct - 05 Nov	Jet2	direct
25 Oct - 07 Nov	Ryanair
30 Oct - 04 Nov	Ryanair

Also check the deals for one-way flights from London 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 London to Keflavik in October from 101€

Return flights