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

Return flights

30 Aug - 12 Sep	British Airways
28 Aug - 15 Sep	British Airways
30 Aug - 08 Sep	British Airways
28 Aug - 08 Sep	SWISS
28 Aug - 04 Sep	SWISS
19 Aug - 04 Sep	SWISS
27 Aug - 10 Sep	SWISS
19 Aug - 05 Sep	SWISS
30 Aug - 03 Sep	British Airways
31 Aug - 13 Sep	British Airways
13 Aug - 20 Aug	Lufthansa
13 Aug - 14 Aug	Lufthansa
13 Aug - 13 Aug	SWISS
19 Aug - 21 Aug	SWISS
15 Aug - 20 Aug	Lufthansa
14 Aug - 19 Aug	Lufthansa
14 Aug - 16 Aug	Lufthansa
13 Aug - 16 Aug	Lufthansa
13 Aug - 27 Aug	Lufthansa
14 Aug - 27 Aug	Lufthansa

Also check the deals for one-way flights from London to Bucharest 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 Bucharest in August from 181€

Return flights