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

Return flights

02 Dec - 10 Dec	Air Busan
22 Dec - 06 Jan	Air Japan
21 Dec - 29 Dec	Air Japan
16 Dec - 24 Dec	Jeju Air
20 Dec - 27 Dec	MIAT Mongolian Airlines
20 Dec - 26 Dec	MIAT Mongolian Airlines
21 Dec - 27 Dec	Jin Air
08 Dec - 18 Dec	Air Busan
22 Dec - 30 Dec	LOT
24 Dec - 30 Dec	LOT
04 Dec - 08 Dec	Japan Airlines
24 Dec - 01 Jan	LOT
29 Dec - 02 Jan	Air Premia
28 Dec - 04 Jan	Turkish Airlines
25 Dec - 06 Jan	Emirates
23 Dec - 01 Jan	Qatar Airways
25 Dec - 01 Jan	Qatar Airways
26 Dec - 01 Jan	Qatar Airways
26 Dec - 04 Jan	Qatar Airways
26 Dec - 03 Jan	Finnair

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 $935

Return flights