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

Return flights

17 Sep - 20 Sep	easyJet
16 Sep - 20 Sep	easyJet
17 Sep - 19 Sep	easyJet
19 Sep - 23 Sep	easyJet
26 Sep - 30 Sep	Ryanair
19 Sep - 22 Sep	easyJet
17 Sep - 21 Sep	easyJet
22 Sep - 27 Sep	Ryanair
22 Sep - 28 Sep	Ryanair
23 Sep - 28 Sep	Ryanair
29 Sep - 01 Oct	Ryanair
28 Sep - 01 Oct	KLM
29 Sep - 01 Oct	Luxair	direct
28 Sep - 01 Oct	Luxair	direct

Also check the deals for one-way flights from Luxemburg to Copenhagen 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 Copenhagen in September from $126

Return flights