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

Return flights

31 Dec - 06 Jan	Qatar Airways
21 Dec - 08 Jan	Finnair
03 Dec - 08 Dec	Finnair
25 Dec - 31 Dec	HK Express
23 Dec - 25 Dec	Japan Airlines
20 Dec - 25 Dec	Qatar Airways
26 Dec - 30 Dec	Finnair
26 Dec - 06 Jan	Finnair
25 Dec - 01 Jan	Finnair
29 Dec - 05 Jan	Qatar Airways
26 Dec - 01 Jan	Finnair
26 Dec - 02 Jan	Scandinavian Airlines
27 Dec - 01 Jan	Qatar Airways
26 Dec - 04 Jan	Finnair
29 Dec - 02 Jan	Qatar Airways

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

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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Cheapest return flights from Tokyo to Keflavik in December from $1209

Return flights