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

Return flights

25 Aug - 17 Sep	KLM
26 Aug - 19 Sep	KLM
27 Aug - 19 Sep	KLM
28 Aug - 19 Sep	KLM
28 Aug - 29 Sep	KLM
27 Aug - 18 Sep	KLM
26 Aug - 30 Sep	KLM
24 Aug - 17 Sep	KLM
20 Aug - 16 Sep	KLM
21 Aug - 14 Sep	KLM
11 Aug - 18 Aug	KLM
08 Aug - 18 Aug	KLM
08 Aug - 20 Aug	KLM
13 Aug - 20 Aug	KLM
08 Aug - 11 Aug	KLM
11 Aug - 20 Aug	KLM
08 Aug - 16 Aug	KLM
21 Aug - 31 Aug	KLM
25 Aug - 31 Aug	KLM
27 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 654€

Return flights