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

Return flights

05 Dec - 07 Dec	easyJet
15 Dec - 17 Dec	Wizz Air	direct
05 Dec - 14 Dec	Wizz Air	direct
05 Dec - 17 Dec	Wizz Air	direct
15 Dec - 28 Dec	Wizz Air	direct
05 Dec - 07 Dec	Wizz Air	direct
13 Dec - 06 Jan	Lufthansa
15 Dec - 26 Dec	Wizz Air	direct
05 Dec - 26 Dec	Wizz Air	direct
22 Dec - 28 Dec	easyJet
22 Dec - 28 Dec	Wizz Air	direct
31 Dec - 07 Jan	Wizz Air	direct
21 Dec - 07 Jan	Wizz Air	direct
22 Dec - 07 Jan	Wizz Air	direct

Also check the deals for one-way flights from Basel to Sofia 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 Basel to Sofia in December from 122€

Return flights