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

Return flights

12 Oct - 27 Oct	easyJet	direct
12 Oct - 05 Nov	easyJet	direct
31 Oct - 05 Nov	easyJet	direct
30 Oct - 07 Nov	easyJet	direct
27 Oct - 30 Oct	easyJet	direct
23 Oct - 27 Oct	Wizz Air
31 Oct - 03 Nov	easyJet	direct
20 Oct - 27 Oct	Wizz Air
28 Oct - 04 Nov	easyJet
22 Oct - 27 Oct	Wizz Air
19 Oct - 27 Oct	Wizz Air
12 Oct - 19 Oct	easyJet	direct
16 Oct - 27 Oct	Wizz Air
27 Oct - 28 Oct	easyJet
05 Oct - 08 Oct	easyJet
24 Oct - 28 Nov	Wizz Air
27 Oct - 03 Nov	Wizz Air
20 Oct - 03 Nov	Wizz Air
31 Oct - 02 Nov	easyJet
30 Oct - 02 Nov	easyJet

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 84€

Return flights