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

Return flights

21 Jan - 26 Jan	British Airways	direct
31 Jan - 10 Feb	British Airways
31 Jan - 03 Feb	British Airways
23 Jan - 24 Jan	Aer Lingus
25 Jan - 31 Jan	British Airways
24 Jan - 08 Feb	Vueling Airlines
25 Jan - 27 Jan	SWISS
25 Jan - 26 Jan	SWISS
22 Jan - 28 Jan	SWISS
26 Jan - 26 Jan	SWISS
26 Jan - 28 Jan	SWISS
25 Jan - 29 Jan	SWISS
19 Jan - 26 Jan	British Airways	direct
25 Jan - 12 Feb	SWISS
26 Jan - 02 Feb	SWISS
26 Jan - 04 Feb	SWISS
22 Jan - 04 Feb	SWISS
21 Jan - 04 Feb	SWISS
31 Jan - 02 Feb	British Airways
31 Jan - 04 Feb	British Airways

Also check the deals for one-way flights from London to Sofia in January.

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 January from 156€

Return flights