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

Return flights

06 Dec - 10 Dec	Wizz Air Malta
10 Dec - 11 Dec	Ryanair
06 Dec - 11 Dec	Wizz Air Malta
11 Dec - 15 Dec	Ryanair
13 Dec - 14 Jan	Lufthansa
09 Dec - 14 Dec	Wizz Air
03 Dec - 05 Dec	Ryanair
15 Dec - 19 Dec	Lufthansa
02 Dec - 04 Dec	Ryanair
02 Dec - 05 Dec	Wizz Air
30 Dec - 05 Jan	Ryanair
01 Dec - 05 Dec	Wizz Air
22 Dec - 05 Jan	KLM

Also check the deals for one-way flights from Oslo to Basel 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 Basel in December from 105€

Return flights