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

Return flights

27 Sep - 06 Oct	easyJet
24 Sep - 30 Sep	easyJet
25 Sep - 08 Oct	easyJet
30 Sep - 04 Oct	easyJet
16 Sep - 29 Sep	Vueling Airlines
24 Sep - 27 Sep	easyJet
16 Sep - 23 Sep	Vueling Airlines
16 Sep - 30 Sep	Vueling Airlines
20 Sep - 29 Sep	easyJet
24 Sep - 07 Oct	Vueling Airlines
16 Sep - 07 Oct	Vueling Airlines
23 Sep - 29 Sep	easyJet
26 Sep - 30 Sep	easyJet
30 Sep - 19 Oct	Vueling Airlines
26 Sep - 29 Sep	easyJet
20 Sep - 23 Sep	easyJet
17 Sep - 07 Oct	Vueling Airlines
29 Sep - 19 Oct	Vueling Airlines
24 Sep - 14 Oct	Vueling Airlines
26 Sep - 05 Oct	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 128€

Return flights