Cheapest return LCY–KEF flights, December

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

Return flights

14 Dec - 17 Dec British Airways
07 Dec - 10 Dec British Airways
08 Dec - 16 Dec British Airways
28 Dec - 08 Jan KLM
09 Dec - 13 Dec British Airways
10 Dec - 15 Dec British Airways
07 Dec - 11 Dec British Airways
14 Dec - 24 Dec British Airways
10 Dec - 13 Dec British Airways
09 Dec - 14 Dec British Airways
03 Dec - 06 Dec British Airways
26 Dec - 01 Jan KLM
29 Dec - 03 Jan British Airways
23 Dec - 01 Jan British Airways
30 Dec - 03 Jan British Airways
30 Dec - 01 Jan British Airways
29 Dec - 06 Jan KLM
26 Dec - 02 Jan Aer Lingus

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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