Cheapest return flights from London to Keflavik in December from $168

AirHint found the following cheapest return flights from London (LHR) to Keflavik (KEF) in December 2025 (see full year).

Return flights

07 Dec - 13 Dec British Airways direct
06 Dec - 12 Dec British Airways direct
11 Dec - 13 Dec British Airways direct
06 Dec - 14 Dec Icelandair
13 Dec - 14 Dec British Airways direct
02 Dec - 07 Dec Icelandair
02 Dec - 11 Dec Icelandair
14 Dec - 21 Dec Icelandair
05 Dec - 13 Dec Icelandair direct
12 Dec - 15 Dec Icelandair direct
29 Dec - 09 Jan Icelandair direct
26 Dec - 09 Jan Icelandair direct
31 Dec - 05 Jan Icelandair direct
27 Dec - 08 Jan Icelandair direct
29 Dec - 05 Jan Icelandair
29 Dec - 05 Jan Icelandair direct
24 Dec - 01 Jan Icelandair direct
17 Dec - 04 Jan Icelandair direct
26 Dec - 01 Jan Icelandair direct
23 Dec - 01 Jan Icelandair direct

Also check the deals for one-way flights from London to Keflavik in December.

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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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