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

Return flights

30 Aug - 17 Sep	Lufthansa
31 Aug - 09 Sep	Lufthansa
31 Aug - 10 Sep	Lufthansa
26 Aug - 13 Sep	Lufthansa
13 Aug - 15 Sep	British Airways
27 Aug - 10 Sep	Austrian Airlines
15 Aug - 17 Sep	Lufthansa
15 Aug - 18 Sep	Lufthansa
15 Aug - 15 Sep	Scandinavian Airlines
15 Aug - 16 Sep	Scandinavian Airlines
11 Aug - 27 Aug	Lufthansa
07 Aug - 14 Aug	British Airways
07 Aug - 09 Aug	British Airways
04 Aug - 06 Aug	Lufthansa
04 Aug - 05 Aug	Lufthansa
19 Aug - 21 Aug	Lufthansa
05 Aug - 08 Aug	Lufthansa
12 Aug - 19 Aug	Lufthansa
06 Aug - 08 Aug	Lufthansa
06 Aug - 14 Aug	Lufthansa

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

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 August from $213

Return flights