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

Return flights

21 Aug - 18 Sep	KLM
21 Aug - 14 Sep	KLM
31 Aug - 16 Sep	KLM
31 Aug - 18 Sep	KLM
31 Aug - 28 Sep	KLM
31 Aug - 14 Sep	KLM
20 Aug - 16 Sep	KLM
29 Aug - 16 Sep	KLM
23 Aug - 16 Sep	KLM
31 Aug - 09 Sep	KLM
14 Aug - 26 Aug	SWISS
25 Aug - 31 Aug	KLM
28 Aug - 31 Aug	KLM
11 Aug - 31 Aug	Aer Lingus
17 Aug - 31 Aug	KLM
24 Aug - 31 Aug	KLM
18 Aug - 27 Aug	KLM
19 Aug - 28 Aug	KLM
21 Aug - 28 Aug	KLM
18 Aug - 28 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 $781

Return flights