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

Return flights

04 Dec - 08 Dec	Lufthansa
08 Dec - 12 Dec	Lufthansa
12 Dec - 15 Dec	Lufthansa
10 Dec - 14 Dec	Lufthansa
26 Dec - 31 Dec	Lufthansa
15 Dec - 28 Dec	Lufthansa
29 Dec - 05 Jan	Lufthansa
26 Dec - 05 Jan	Lufthansa
22 Dec - 13 Jan	Lufthansa
29 Dec - 04 Jan	Lufthansa
22 Dec - 01 Jan	Lufthansa
26 Dec - 04 Jan	Lufthansa
22 Dec - 05 Jan	Lufthansa
02 Dec - 04 Dec	KLM
21 Dec - 13 Jan	KLM
19 Dec - 07 Jan	KLM
24 Dec - 28 Dec	KLM
28 Dec - 02 Jan	KLM
21 Dec - 28 Dec	KLM
19 Dec - 21 Dec	KLM

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 $263

Return flights