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

Return flights

30 Oct - 26 Nov	easyJet	direct
31 Oct - 26 Nov	easyJet	direct
30 Oct - 27 Nov	easyJet	direct
31 Oct - 27 Nov	easyJet	direct
30 Oct - 25 Nov	easyJet	direct
31 Oct - 25 Nov	easyJet	direct
30 Oct - 19 Nov	easyJet	direct
30 Oct - 20 Nov	easyJet	direct
30 Oct - 14 Nov	easyJet	direct
31 Oct - 19 Nov	easyJet	direct
22 Oct - 26 Oct	Wizz Air UK
21 Oct - 22 Oct	Wizz Air
17 Oct - 21 Oct	Wizz Air
14 Oct - 21 Oct	Wizz Air
20 Oct - 22 Oct	Wizz Air
16 Oct - 22 Oct	Wizz Air
21 Oct - 25 Oct	Wizz Air
17 Oct - 19 Oct	Wizz Air
22 Oct - 28 Oct	Wizz Air
21 Oct - 28 Oct	Wizz Air

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.

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Cheapest return flights from London to Keflavik in October from $168

Return flights