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

Return flights

29 Sep - 03 Oct	Ryanair
26 Sep - 03 Oct	Ryanair
19 Sep - 25 Sep	Ryanair
19 Sep - 21 Sep	KLM
21 Sep - 12 Oct	KLM
18 Sep - 25 Sep	Ryanair
25 Sep - 26 Sep	Ryanair
17 Sep - 21 Sep	KLM
23 Sep - 26 Sep	Ryanair
26 Sep - 03 Oct	Luxair	direct
21 Sep - 05 Oct	KLM
21 Sep - 24 Sep	Luxair
21 Sep - 25 Sep	Luxair
15 Sep - 19 Sep	Ryanair
21 Sep - 12 Oct	Luxair	direct
19 Sep - 26 Sep	Ryanair
21 Sep - 05 Oct	Luxair	direct

Also check the deals for one-way flights from Luxemburg to Oslo 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 Luxemburg to Oslo in September from 148€

Return flights