Cheapest return flights from London to Keflavik in December from $171

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

Return flights

05 Dec - 08 Dec Icelandair direct
04 Dec - 09 Dec Icelandair direct
05 Dec - 09 Dec Icelandair direct
02 Dec - 06 Dec Icelandair direct
05 Dec - 10 Dec Icelandair direct
06 Dec - 12 Dec Icelandair direct
07 Dec - 13 Dec British Airways direct
06 Dec - 08 Dec Icelandair direct
02 Dec - 07 Dec Icelandair direct
06 Dec - 07 Dec Icelandair direct
15 Dec - 14 Jan British Airways direct
29 Dec - 01 Jan Scandinavian Airlines
18 Dec - 06 Jan British Airways direct
29 Dec - 05 Jan Scandinavian Airlines
30 Dec - 01 Jan Scandinavian Airlines
27 Dec - 09 Jan Icelandair direct
28 Dec - 01 Jan Scandinavian Airlines
16 Dec - 04 Jan British Airways direct
23 Dec - 01 Jan Icelandair direct
19 Dec - 01 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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