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

Return flights

28 Aug - 02 Sep	KLM
31 Aug - 03 Sep	Ryanair
27 Aug - 12 Sep	Vueling Airlines
12 Aug - 16 Aug	KLM
27 Aug - 03 Sep	Vueling Airlines
31 Aug - 08 Sep	Ryanair
28 Aug - 01 Sep	KLM
30 Aug - 03 Sep	TAP
26 Aug - 01 Sep	Ryanair
30 Aug - 04 Sep	TAP
28 Aug - 04 Sep	KLM
28 Aug - 31 Aug	KLM
26 Aug - 31 Aug	Ryanair
27 Aug - 31 Aug	KLM
12 Aug - 17 Aug	Vueling Airlines
19 Aug - 20 Aug	Norwegian Air Sweden AOC
12 Aug - 20 Aug	Vueling Airlines
19 Aug - 21 Aug	Norwegian Air Sweden AOC
20 Aug - 30 Aug	Eurowings
26 Aug - 29 Aug	Ryanair

Also check the deals for one-way flights from Lisbon to Copenhagen in August.

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 August from $229

Return flights