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

Return flights

03 Dec - 15 Dec	Vueling Airlines
06 Dec - 07 Dec	British Airways	direct
06 Dec - 08 Dec	British Airways	direct
06 Dec - 13 Dec	British Airways	direct
06 Dec - 10 Dec	British Airways	direct
01 Dec - 06 Dec	Aegean Airlines
02 Dec - 06 Dec	Aegean Airlines
11 Dec - 13 Dec	Vueling Airlines
10 Dec - 13 Dec	Vueling Airlines
03 Dec - 06 Dec	Vueling Airlines
31 Dec - 15 Jan	SWISS
31 Dec - 08 Jan	SWISS
10 Dec - 10 Jan	Vueling Airlines
15 Dec - 12 Jan	LOT
15 Dec - 13 Jan	LOT
15 Dec - 14 Jan	LOT
15 Dec - 11 Jan	LOT
15 Dec - 09 Jan	LOT
06 Dec - 15 Jan	Lufthansa
31 Dec - 07 Jan	SWISS

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.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest return flights from London to Sofia in December from 137€

Return flights