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

Return flights

06 Dec - 13 Dec	Ryanair
06 Dec - 10 Dec	Ryanair
05 Dec - 10 Dec	Ryanair
03 Dec - 10 Dec	Ryanair
05 Dec - 17 Dec	Ryanair
11 Dec - 15 Dec	Ryanair
12 Dec - 13 Dec	Ryanair
07 Dec - 12 Dec	Norwegian
07 Dec - 19 Dec	Norwegian
12 Dec - 19 Dec	Ryanair
17 Dec - 10 Jan	Ryanair
10 Dec - 07 Jan	Wizz Air
16 Dec - 05 Jan	Ryanair
12 Dec - 07 Jan	Norwegian
11 Dec - 06 Jan	Air Serbia
18 Dec - 14 Jan	Scandinavian Airlines
17 Dec - 07 Jan	Scandinavian Airlines
17 Dec - 05 Jan	Ryanair
15 Dec - 04 Jan	Ryanair
13 Dec - 04 Jan	Wizz Air Malta

Also check the deals for one-way flights from Oslo to Lisbon in December.

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 Oslo to Lisbon in December from 98€

Return flights