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

Return flights

27 Aug - 16 Sep	SWISS
29 Aug - 19 Sep	SWISS
25 Aug - 11 Sep	SWISS
20 Aug - 17 Sep	SWISS
27 Aug - 13 Sep	SWISS
25 Aug - 10 Sep	SWISS
29 Aug - 08 Sep	SWISS
31 Aug - 07 Sep	SWISS
24 Aug - 07 Sep	SWISS
11 Aug - 20 Aug	Saudia
05 Aug - 18 Aug	Saudia
09 Aug - 20 Aug	Saudia
11 Aug - 25 Aug	Saudia
12 Aug - 27 Aug	Saudia
06 Aug - 13 Aug	Saudia
12 Aug - 08 Sep	Saudia
18 Aug - 25 Aug	Saudia
05 Aug - 27 Aug	Saudia
06 Aug - 27 Aug	Saudia
16 Aug - 31 Aug	Aegean Airlines

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 536€

Return flights