AirHint found the following cheapest return flights from London (LCY) to Keflavik (KEF) in January 2026 (see full year).

Return flights

07 Jan - 16 Jan	KLM
28 Jan - 02 Feb	KLM
19 Jan - 26 Jan	KLM
22 Jan - 26 Jan	KLM
15 Jan - 19 Jan	KLM
21 Jan - 26 Jan	KLM
08 Jan - 14 Jan	KLM
08 Jan - 12 Jan	KLM
07 Jan - 12 Jan	KLM
24 Jan - 30 Jan	KLM
19 Jan - 23 Jan	KLM
21 Jan - 13 Feb	KLM
27 Jan - 01 Feb	KLM
29 Jan - 01 Feb	KLM
28 Jan - 01 Feb	KLM
27 Jan - 07 Feb	KLM
31 Jan - 08 Feb	KLM
31 Jan - 02 Feb	KLM
30 Jan - 04 Feb	KLM
30 Jan - 06 Feb	KLM

Also check the deals for one-way flights from London to Keflavik in January.

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 January from 225€

Return flights