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

One-Way flights

17 Dec	Vueling Airlines
18 Dec	Vueling Airlines
10 Dec	Vueling Airlines
04 Dec	Vueling Airlines
20 Dec	Ryanair
08 Dec	easyJet
27 Dec	easyJet
07 Dec	Vueling Airlines
21 Dec	Wizz Air Malta
19 Dec	Ryanair

Also check the deals for return 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 one-way flights from Lisbon to Sofia in December from $61

One-Way flights