Cheapest return flights from London to Keflavik in December from $193

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

Return flights

05 Dec - 07 Dec Icelandair direct
10 Dec - 17 Dec British Airways direct
01 Dec - 16 Dec Icelandair direct
03 Dec - 07 Dec Icelandair direct
10 Dec - 29 Dec Icelandair direct
13 Dec - 17 Dec Icelandair direct
04 Dec - 08 Dec Icelandair direct
06 Dec - 07 Dec Icelandair direct
12 Dec - 15 Dec Icelandair direct
05 Dec - 08 Dec Icelandair direct
14 Dec - 17 Jan Icelandair direct
20 Dec - 24 Jan Icelandair direct
27 Dec - 09 Jan Icelandair direct
15 Dec - 08 Jan Icelandair direct
31 Dec - 07 Jan Icelandair direct
31 Dec - 05 Jan Icelandair direct
31 Dec - 08 Jan Icelandair direct
29 Dec - 07 Jan Icelandair direct
27 Dec - 05 Jan Icelandair direct
31 Dec - 04 Jan Scandinavian Airlines

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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