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

Return flights

24 Sep - 29 Sep	easyJet
24 Sep - 30 Sep	easyJet
17 Sep - 29 Sep	easyJet
25 Sep - 29 Oct	Vueling Airlines
24 Sep - 04 Oct	easyJet
30 Sep - 06 Oct	Ryanair
27 Sep - 06 Oct	Ryanair
25 Sep - 29 Sep	easyJet
27 Sep - 30 Sep	Ryanair
29 Sep - 08 Oct	Ryanair
27 Sep - 05 Oct	Ryanair
29 Sep - 04 Oct	Ryanair
29 Sep - 05 Oct	Ryanair
16 Sep - 30 Sep	easyJet
27 Sep - 29 Sep	easyJet
30 Sep - 04 Oct	easyJet
18 Sep - 23 Sep	Vueling Airlines
27 Sep - 01 Oct	Ryanair
26 Sep - 30 Sep	Vueling Airlines
17 Sep - 22 Sep	easyJet

Also check the deals for one-way flights from Lisbon 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 Lisbon to Copenhagen in September from 152€

Return flights