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

Return flights

13 Sep - 13 Oct	Ryanair
07 Sep - 28 Sep	Ryanair
14 Sep - 30 Sep	Ryanair
07 Sep - 21 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
17 Sep - 29 Sep	Ryanair
07 Sep - 16 Sep	Ryanair
14 Sep - 21 Sep	Ryanair
09 Sep - 15 Sep	Ryanair
01 Sep - 10 Sep	Norwegian Air Sweden AOC
01 Sep - 15 Sep	Norwegian Air Sweden AOC
23 Sep - 08 Oct	Norwegian
10 Sep - 08 Oct	Ryanair
27 Sep - 04 Oct	Ryanair
28 Sep - 04 Oct	Lufthansa
21 Sep - 23 Oct	Etihad Airways
28 Sep - 05 Oct	Lufthansa
28 Sep - 30 Oct	Thai Airways

Also check the deals for one-way flights from Oslo to Tokyo 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 Oslo to Tokyo in September from $765

Return flights