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

Return flights

05 Jan - 11 Jan	Ryanair
05 Jan - 08 Jan	Ryanair
17 Jan - 18 Jan	Ryanair
10 Jan - 18 Jan	Ryanair
16 Jan - 20 Jan	Ryanair
17 Jan - 22 Jan	Ryanair
25 Jan - 29 Jan	Ryanair
12 Jan - 15 Jan	Ryanair
24 Jan - 25 Jan	Ryanair
03 Jan - 06 Jan	easyJet
31 Jan - 07 Feb	Ryanair
28 Jan - 01 Feb	easyJet
26 Jan - 04 Feb	Ryanair
28 Jan - 04 Feb	Ryanair
30 Jan - 01 Feb	Ryanair
31 Jan - 04 Feb	Ryanair
27 Jan - 03 Feb	easyJet
29 Jan - 01 Feb	easyJet
31 Jan - 06 Feb	Ryanair

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 137€

Return flights