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

Return flights

27 Aug - 13 Sep	SWISS
25 Aug - 22 Sep	KLM
27 Aug - 14 Sep	SWISS
31 Aug - 17 Sep	SWISS
25 Aug - 15 Sep	KLM
23 Aug - 13 Sep	SWISS
24 Aug - 14 Sep	SWISS
26 Aug - 10 Sep	SWISS
20 Aug - 06 Sep	SWISS
25 Aug - 03 Sep	SWISS
20 Aug - 29 Aug	KLM
19 Aug - 29 Aug	KLM
27 Aug - 31 Aug	SWISS
19 Aug - 31 Aug	KLM
18 Aug - 31 Aug	KLM
23 Aug - 30 Aug	SWISS
22 Aug - 31 Aug	SWISS
24 Aug - 31 Aug	SWISS
23 Aug - 29 Aug	SWISS
21 Aug - 29 Aug	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 612€

Return flights