Cheapest return flights from London to Keflavik in December from 301€

Best time to book flights for London (LCY) to Keflavik (KEF) flights at AirHint

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

Return flights

11 Dec - 14 Dec ITA Airways
17 Dec - 21 Dec ITA Airways
15 Dec - 21 Dec ITA Airways
17 Dec - 23 Dec ITA Airways
04 Dec - 07 Dec ITA Airways
05 Dec - 14 Dec ITA Airways
12 Dec - 14 Dec Lufthansa
25 Dec - 28 Dec ITA Airways
06 Dec - 10 Dec KLM
03 Dec - 09 Dec British Airways
29 Dec - 02 Jan SWISS
30 Dec - 02 Jan KLM
29 Dec - 03 Jan SWISS
31 Dec - 03 Jan KLM
30 Dec - 03 Jan KLM
30 Dec - 01 Jan SWISS

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

Skyscanner

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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