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

Return flights

08 Jan - 11 Jan	Ryanair
24 Jan - 29 Jan	Ryanair
23 Jan - 25 Jan	Ryanair
14 Jan - 23 Jan	Ryanair
26 Jan - 31 Jan	Ryanair
26 Jan - 29 Jan	Ryanair
22 Jan - 26 Jan	Ryanair
07 Jan - 14 Jan	Ryanair
23 Jan - 29 Jan	easyJet
10 Jan - 10 Feb	Ryanair
12 Jan - 10 Feb	Ryanair
09 Jan - 12 Jan	Ryanair
31 Jan - 05 Feb	easyJet
29 Jan - 05 Feb	Ryanair
28 Jan - 01 Feb	Ryanair
25 Jan - 02 Feb	Ryanair
30 Jan - 05 Feb	easyJet
29 Jan - 02 Feb	Ryanair
28 Jan - 07 Feb	Ryanair
30 Jan - 02 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from London to Keflavik in January from $169

Return flights