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

Return flights

02 Dec - 07 Dec	Wizz Air
06 Dec - 11 Dec	Ryanair
05 Dec - 08 Dec	Wizz Air
18 Dec - 21 Dec	Ryanair
30 Dec - 03 Jan	Ryanair
24 Dec - 05 Jan	Wizz Air
22 Dec - 01 Jan	Wizz Air
24 Dec - 01 Jan	Ryanair
27 Dec - 03 Jan	Wizz Air

Also check the deals for one-way flights from Sofia 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 Sofia to Lisbon in December from $160

Return flights