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

Return flights

03 Dec - 05 Dec	SWISS
04 Dec - 08 Dec	Lufthansa
11 Dec - 15 Dec	Lufthansa
15 Dec - 23 Dec	Lufthansa
15 Dec - 31 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
15 Dec - 19 Dec	Lufthansa
15 Dec - 01 Jan	Lufthansa
12 Dec - 29 Dec	Lufthansa
05 Dec - 08 Dec	Lufthansa
05 Dec - 07 Dec	Lufthansa
15 Dec - 04 Jan	Lufthansa
12 Dec - 05 Jan	Lufthansa
12 Dec - 04 Jan	Lufthansa
17 Dec - 04 Jan	Lufthansa
19 Dec - 07 Jan	Lufthansa
13 Dec - 04 Jan	SWISS
26 Dec - 02 Jan	Lufthansa
14 Dec - 04 Jan	SWISS
22 Dec - 05 Jan	Lufthansa

Also check the deals for one-way flights from London 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 London to Sofia in December from 205€

Return flights