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

Return flights

12 Oct - 15 Oct	easyJet	direct
08 Oct - 15 Oct	easyJet	direct
31 Oct - 07 Nov	easyJet	direct
08 Oct - 12 Oct	easyJet	direct
31 Oct - 03 Nov	easyJet	direct
15 Oct - 19 Oct	easyJet	direct
08 Oct - 13 Oct	easyJet
29 Oct - 03 Nov	easyJet	direct
22 Oct - 26 Oct	easyJet	direct
03 Oct - 15 Oct	easyJet
28 Oct - 19 Nov	easyJet
31 Oct - 10 Nov	easyJet	direct
22 Oct - 27 Oct	easyJet	direct
21 Oct - 27 Oct	easyJet
03 Oct - 08 Oct	easyJet
24 Oct - 07 Nov	easyJet
30 Oct - 07 Nov	easyJet
27 Oct - 05 Nov	easyJet
26 Oct - 04 Nov	easyJet	direct
30 Oct - 07 Nov	easyJet	direct

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 $110

Return flights