AirHint found the following cheapest one-way flights from London (LHR) to Keflavik (KEF) in January 2026 (see full year).

One-Way flights

13 Jan	Icelandair	direct
11 Jan	Icelandair	direct
30 Jan	Icelandair	direct
16 Jan	Icelandair	direct
10 Jan	Icelandair	direct
15 Jan	Icelandair	direct
26 Jan	Icelandair	direct
18 Jan	Icelandair	direct
07 Jan	Icelandair	direct
23 Jan	Icelandair	direct

Also check the deals for return 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 one-way flights from London to Keflavik in January from 79€

One-Way flights