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

Return flights

17 Sep - 20 Sep	HK Express
11 Sep - 17 Sep	HK Express
10 Sep - 15 Sep	VietJet Air
11 Sep - 21 Sep	HK Express
19 Sep - 28 Sep	HK Express
27 Sep - 04 Oct	Zipair
17 Sep - 27 Sep	Zipair
18 Sep - 02 Oct	Air Canada
23 Sep - 03 Oct	Finnair
08 Sep - 17 Sep	Air Canada
09 Sep - 22 Sep	Air Canada
09 Sep - 15 Sep	Air Canada
11 Sep - 23 Sep	Air Canada
22 Sep - 05 Oct	Finnair
30 Sep - 05 Oct	Singapore Airlines
19 Sep - 05 Oct	Air Canada

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 $1052

Return flights