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

Return flights

26 Aug - 06 Sep	Vueling Airlines
27 Aug - 06 Sep	Norwegian
29 Aug - 01 Sep	easyJet
30 Aug - 06 Sep	Norwegian
26 Aug - 03 Sep	Vueling Airlines
27 Aug - 03 Sep	Norwegian
04 Aug - 16 Aug	Vueling Airlines
20 Aug - 25 Aug	Vueling Airlines
07 Aug - 21 Aug	Ryanair
26 Aug - 28 Aug	Vueling Airlines
27 Aug - 28 Aug	Norwegian
27 Aug - 10 Sep	Norwegian
30 Aug - 01 Sep	Norwegian
12 Aug - 23 Aug	Ryanair
20 Aug - 06 Sep	Norwegian
20 Aug - 23 Aug	Norwegian	direct
20 Aug - 27 Aug	Norwegian
21 Aug - 25 Aug	Ryanair
29 Aug - 02 Sep	easyJet
15 Aug - 23 Aug	easyJet

Also check the deals for one-way flights from Lisbon to Oslo 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 Oslo in August from $247

Return flights