AirHint found the following cheapest return flights from London (LHR) to Sofia (SOF) in December 2026 (see full year).

Return flights

09 Dec - 13 Dec	British Airways	direct
12 Dec - 16 Dec	British Airways	direct
16 Dec - 22 Dec	Lufthansa
08 Dec - 12 Dec	Lufthansa
16 Dec - 06 Jan	Lufthansa
10 Dec - 21 Dec	Lufthansa
12 Dec - 12 Dec	Lufthansa
15 Dec - 19 Dec	Lufthansa
12 Dec - 20 Dec	Lufthansa
16 Dec - 06 Jan	British Airways	direct
17 Dec - 06 Jan	Lufthansa
04 Dec - 06 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
26 Dec - 01 Jan	Austrian Airlines
19 Dec - 06 Jan	Lufthansa
30 Dec - 03 Jan	Lufthansa
18 Dec - 06 Jan	Lufthansa
27 Dec - 03 Jan	Lufthansa
23 Dec - 03 Jan	Lufthansa
18 Dec - 03 Jan	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 $170

Return flights