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
26 Sep - 28 Sep	Aer Lingus
24 Sep - 07 Oct	easyJet
27 Sep - 30 Sep	Ryanair
30 Sep - 07 Oct	easyJet
27 Sep - 05 Oct	Ryanair
29 Sep - 04 Oct	Ryanair
25 Sep - 29 Sep	easyJet
20 Sep - 29 Sep	easyJet
29 Sep - 05 Oct	Ryanair
29 Sep - 03 Oct	Ryanair
25 Sep - 04 Oct	Vueling Airlines
27 Sep - 29 Sep	easyJet
25 Sep - 01 Oct	Vueling Airlines
25 Sep - 05 Oct	Vueling Airlines
27 Sep - 01 Oct	Ryanair
20 Sep - 24 Sep	TAP
20 Sep - 22 Sep	easyJet
23 Sep - 29 Sep	easyJet
25 Sep - 30 Sep	Vueling Airlines

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.

Book a cheap hotel in Copenhagen

Cheap car rent in Copenhagen

Cheapest return flights from Lisbon to Copenhagen in September from $178

Return flights