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

Return flights

05 Dec - 09 Dec	Ryanair
03 Dec - 06 Dec	Vueling Airlines
02 Dec - 07 Dec	Ryanair
11 Dec - 16 Dec	Ryanair
26 Dec - 02 Jan	Ryanair
08 Dec - 13 Dec	Ryanair
03 Dec - 08 Dec	Ryanair
03 Dec - 10 Dec	Ryanair
06 Dec - 08 Dec	easyJet
06 Dec - 12 Dec	Ryanair
26 Dec - 31 Dec	Ryanair
21 Dec - 18 Jan	easyJet
17 Dec - 04 Jan	Vueling Airlines
30 Dec - 02 Jan	TAP
31 Dec - 18 Jan	Vueling Airlines
30 Dec - 04 Jan	TAP
31 Dec - 04 Jan	Iberia
24 Dec - 11 Jan	Vueling Airlines
31 Dec - 11 Jan	Vueling Airlines
27 Dec - 02 Jan	TAP

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 126€

Return flights