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

Return flights

25 Aug - 22 Sep	SWISS
26 Aug - 14 Sep	SWISS
27 Aug - 25 Sep	SWISS
31 Aug - 14 Sep	SWISS
29 Aug - 15 Sep	SWISS
25 Aug - 15 Sep	SWISS
31 Aug - 06 Sep	SWISS
29 Aug - 26 Sep	SWISS
22 Aug - 06 Sep	SWISS
28 Aug - 11 Sep	SWISS
18 Aug - 30 Aug	SWISS
20 Aug - 27 Aug	SWISS
22 Aug - 30 Aug	SWISS
19 Aug - 30 Aug	SWISS
18 Aug - 31 Aug	KLM
24 Aug - 31 Aug	SWISS
24 Aug - 27 Aug	SWISS
17 Aug - 31 Aug	KLM
18 Aug - 28 Aug	SWISS
12 Aug - 31 Aug	KLM

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 596€

Return flights