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

Return flights

03 Dec - 06 Dec	Ryanair
11 Dec - 19 Dec	Ryanair
03 Dec - 07 Dec	Ryanair
04 Dec - 06 Dec	Air Serbia
11 Dec - 10 Jan	Ryanair
07 Dec - 16 Dec	Air France
04 Dec - 08 Dec	Ryanair
05 Dec - 10 Dec	Ryanair
12 Dec - 20 Dec	Wizz Air
16 Dec - 24 Dec	Ryanair
05 Dec - 09 Dec	easyJet
28 Dec - 14 Jan	Vueling Airlines
29 Dec - 05 Jan	Ryanair
23 Dec - 06 Jan	Scandinavian Airlines
30 Dec - 05 Jan	Ryanair
28 Dec - 04 Jan	Scandinavian Airlines
14 Dec - 04 Jan	TAP
26 Dec - 01 Jan	Ryanair
17 Dec - 04 Jan	Scandinavian Airlines
19 Dec - 01 Jan	Norwegian

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 $154

Return flights