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

Return flights

09 Sep - 12 Sep	easyJet
23 Sep - 27 Sep	easyJet
25 Sep - 29 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
26 Sep - 28 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
29 Sep - 03 Oct	Ryanair
29 Sep - 03 Oct	Luxair	direct
15 Sep - 17 Sep	Ryanair
01 Sep - 08 Sep	easyJet
18 Sep - 21 Sep	Ryanair
04 Sep - 07 Sep	easyJet

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 136€

Return flights