Cheapest one-way flights from London to Keflavik in December from $80

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

One-Way flights

04 Dec Icelandair direct
12 Dec Icelandair direct
08 Dec Icelandair direct
11 Dec Icelandair direct
06 Dec Icelandair direct
13 Dec Icelandair direct
02 Dec Icelandair direct
14 Dec British Airways direct
07 Dec British Airways direct
03 Dec Vueling Airlines

Also check the deals for return 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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