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

Return flights

01 Dec - 10 Dec	China Southern
03 Dec - 12 Dec	Air Busan
05 Dec - 14 Dec	China Southern
01 Dec - 09 Dec	Air Busan
23 Dec - 04 Jan	China Eastern
03 Dec - 05 Dec	Air China
08 Dec - 11 Dec	China Eastern
08 Dec - 17 Dec	Eastar Jet
21 Dec - 05 Jan	Eastar Jet
15 Dec - 23 Dec	Eastar Jet
27 Dec - 11 Jan	Eastar Jet
08 Dec - 12 Dec	China Eastern
09 Dec - 18 Dec	China Southern
28 Dec - 10 Jan	Air China
26 Dec - 06 Jan	Jetstar Japan
28 Dec - 07 Jan	T'way Air
22 Dec - 01 Jan	Zipair
25 Dec - 06 Jan	Japan Airlines
25 Dec - 08 Jan	Japan Airlines
30 Dec - 06 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 766€

Return flights