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

Return flights

16 Dec - 14 Jan	Ryanair
13 Dec - 17 Dec	Ryanair
16 Dec - 15 Jan	Ryanair
11 Dec - 16 Dec	Ryanair
13 Dec - 16 Dec	Ryanair
11 Dec - 14 Dec	Vueling Airlines
02 Dec - 09 Dec	Ryanair
10 Dec - 12 Dec	Vueling Airlines
10 Dec - 16 Dec	easyJet
02 Dec - 11 Dec	Ryanair
11 Dec - 15 Dec	Ryanair
12 Dec - 15 Dec	Ryanair
14 Dec - 14 Jan	Ryanair
15 Dec - 14 Jan	Ryanair
14 Dec - 15 Jan	Ryanair
16 Dec - 16 Jan	Ryanair
15 Dec - 16 Jan	Wizz Air Malta
15 Dec - 15 Jan	Ryanair
17 Dec - 14 Jan	Vueling Airlines
16 Dec - 01 Jan	Ryanair

Also check the deals for one-way flights from Lisbon 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 Lisbon to Sofia in December from 88€

Return flights