AirHint found the following cheapest return flights from London (LCY) to Bangkok (BKK) in August 2026 (see full year).

Return flights

26 Aug - 02 Sep	ITA Airways
26 Aug - 31 Aug	ITA Airways
25 Aug - 01 Sep	ITA Airways
28 Aug - 02 Sep	SWISS
26 Aug - 30 Aug	SWISS
21 Aug - 30 Aug	SWISS
24 Aug - 02 Sep	ITA Airways
20 Aug - 30 Aug	SWISS
21 Aug - 28 Aug	SWISS
19 Aug - 30 Aug	SWISS
19 Aug - 28 Aug	SWISS
21 Aug - 31 Aug	SWISS
13 Aug - 27 Aug	SWISS
20 Aug - 01 Sep	SWISS
23 Aug - 02 Sep	SWISS
20 Aug - 03 Sep	SWISS
30 Aug - 03 Sep	SWISS
16 Aug - 30 Aug	SWISS
13 Aug - 01 Sep	SWISS
23 Aug - 03 Sep	SWISS

Also check the deals for one-way flights from London to Bangkok 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 Bangkok in August from 630€

Return flights