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

Return flights

12 Jan - 16 Jan	KLM
19 Jan - 23 Jan	KLM
22 Jan - 30 Jan	KLM
19 Jan - 22 Jan	KLM
12 Jan - 18 Jan	KLM
08 Jan - 14 Jan	KLM
12 Jan - 15 Jan	KLM
15 Jan - 18 Jan	KLM
08 Jan - 11 Jan	KLM
14 Jan - 21 Jan	KLM
28 Jan - 02 Feb	KLM
29 Jan - 04 Feb	KLM
24 Jan - 01 Feb	KLM
29 Jan - 01 Feb	KLM
29 Jan - 02 Feb	KLM
26 Jan - 01 Feb	KLM
28 Jan - 01 Feb	KLM
30 Jan - 08 Feb	KLM
30 Jan - 02 Feb	KLM
26 Jan - 04 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from London to Keflavik in January from 230€

Return flights