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

Return flights

14 Sep - 22 Sep	ANA
05 Sep - 15 Sep	China Southern
30 Sep - 04 Oct	Vietnam Airlines
07 Sep - 14 Sep	China Southern
11 Sep - 18 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
10 Sep - 15 Sep	Air Canada
08 Sep - 15 Sep	Air Canada
05 Sep - 14 Sep	Air Canada
08 Sep - 14 Sep	Air Canada
06 Sep - 14 Sep	Air Canada
26 Sep - 05 Oct	AirAsia X
27 Sep - 04 Oct	China Southern
26 Sep - 04 Oct	Lufthansa

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

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 September from $1024

Return flights