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

Return flights

06 Sep - 13 Sep	T'way Air
10 Sep - 15 Sep	HK Express
28 Sep - 04 Oct	Jetstar Japan
17 Sep - 27 Sep	China Eastern
06 Sep - 10 Sep	T'way Air
16 Sep - 20 Sep	Zipair
24 Sep - 02 Oct	Scoot
05 Sep - 12 Sep	China Southern
16 Sep - 23 Sep	Jetstar Japan
08 Sep - 14 Sep	Air Canada
05 Sep - 14 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
28 Sep - 08 Oct	LOT
28 Sep - 05 Oct	LOT
20 Sep - 04 Oct	Qatar Airways
25 Sep - 03 Oct	Finnair
24 Sep - 03 Oct	Finnair

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 $1065

Return flights