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

Return flights

06 Dec - 10 Dec	Ryanair
11 Dec - 17 Dec	Ryanair
13 Dec - 20 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
11 Dec - 09 Jan	Ryanair
02 Dec - 09 Dec	Ryanair
11 Dec - 08 Jan	Ryanair
05 Dec - 10 Dec	easyJet
05 Dec - 16 Dec	easyJet
03 Dec - 05 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
05 Dec - 11 Jan	easyJet
11 Dec - 07 Jan	Ryanair
07 Dec - 20 Dec	Norwegian
31 Dec - 06 Jan	Ryanair
17 Dec - 11 Jan	Ryanair
18 Dec - 05 Jan	Ryanair
27 Dec - 07 Jan	Ryanair
26 Dec - 11 Jan	Wizz Air
18 Dec - 04 Jan	Ryanair

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 $157

Return flights