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

Return flights

04 Dec - 20 Dec	Vueling Airlines
04 Dec - 06 Dec	Vueling Airlines
04 Dec - 07 Dec	TAP	direct
04 Dec - 08 Dec	TAP	direct
05 Dec - 08 Dec	TAP	direct
12 Dec - 04 Jan	Scandinavian Airlines
18 Dec - 20 Dec	Vueling Airlines
24 Dec - 26 Dec	TAP	direct
25 Dec - 06 Jan	TAP
25 Dec - 05 Jan	TAP
09 Dec - 20 Dec	Norwegian
20 Dec - 26 Dec	Ryanair
18 Dec - 31 Dec	Vueling Airlines
27 Dec - 01 Jan	Brussels Airlines
29 Dec - 02 Jan	Lufthansa
19 Dec - 08 Jan	TAP	direct
27 Dec - 02 Jan	Lufthansa
25 Dec - 02 Jan	TAP	direct
25 Dec - 06 Jan	TAP	direct
29 Dec - 02 Jan	TAP	direct

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 $182

Return flights