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

Return flights

03 Dec - 07 Dec	Ryanair
06 Dec - 08 Dec	Vueling Airlines
04 Dec - 09 Dec	Ryanair
17 Dec - 01 Jan	Vueling Airlines
06 Dec - 10 Dec	Ryanair
03 Dec - 11 Dec	Vueling Airlines
04 Dec - 08 Dec	Ryanair
06 Dec - 11 Dec	Vueling Airlines
04 Dec - 07 Dec	Vueling Airlines
05 Dec - 12 Dec	KLM
06 Dec - 10 Dec	TAP	direct
29 Dec - 03 Jan	TAP
29 Dec - 03 Jan	TAP	direct

Also check the deals for one-way flights from Lisbon to Oslo 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 Lisbon to Oslo in December from 148€

Return flights