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

Return flights

16 Sep - 24 Sep	Ryanair
14 Sep - 19 Sep	Ryanair
19 Sep - 22 Sep	Ryanair
28 Sep - 03 Oct	KLM
08 Sep - 11 Sep	KLM
28 Sep - 03 Oct	Luxair	direct
09 Sep - 16 Sep	British Airways
01 Sep - 08 Sep	British Airways
14 Sep - 19 Sep	Luxair	direct
12 Sep - 14 Sep	Luxair
12 Sep - 28 Sep	Ryanair
05 Sep - 07 Sep	Luxair

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 138€

Return flights