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

Return flights

15 Jan - 18 Jan	Lufthansa
01 Jan - 06 Jan	Lufthansa
05 Jan - 11 Jan	Lufthansa
14 Jan - 18 Jan	KLM
26 Jan - 02 Feb	KLM
06 Jan - 18 Jan	KLM
07 Jan - 12 Jan	KLM
12 Jan - 16 Jan	KLM
07 Jan - 09 Jan	KLM
15 Jan - 19 Jan	KLM
01 Jan - 05 Jan	KLM
30 Jan - 06 Feb	British Airways
30 Jan - 02 Feb	KLM
27 Jan - 03 Feb	Aer Lingus
28 Jan - 03 Feb	KLM
30 Jan - 08 Feb	KLM
31 Jan - 08 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 271€

Return flights