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

Return flights

19 Jan - 24 Jan	Ryanair
14 Jan - 19 Jan	Ryanair
22 Jan - 26 Jan	Ryanair
19 Jan - 26 Jan	Ryanair
16 Jan - 19 Jan	Ryanair
26 Jan - 30 Jan	Ryanair
25 Jan - 30 Jan	Ryanair
07 Jan - 15 Jan	Ryanair
20 Jan - 02 Feb	Ryanair
14 Jan - 18 Jan	Ryanair
19 Jan - 22 Jan	Ryanair
31 Jan - 01 Feb	Ryanair
30 Jan - 01 Feb	Ryanair
31 Jan - 08 Feb	easyJet

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 146€

Return flights