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

Return flights

29 Aug - 11 Sep	Air China
27 Aug - 16 Sep	SWISS
27 Aug - 14 Sep	SWISS
24 Aug - 14 Sep	SWISS
25 Aug - 23 Sep	SWISS
27 Aug - 13 Sep	SWISS
29 Aug - 19 Sep	SWISS
27 Aug - 11 Sep	SWISS
29 Aug - 15 Sep	SWISS
25 Aug - 17 Sep	SWISS
06 Aug - 18 Aug	Saudia
05 Aug - 18 Aug	Saudia
11 Aug - 18 Aug	Saudia
06 Aug - 13 Aug	Saudia
06 Aug - 11 Aug	Saudia
24 Aug - 30 Aug	Ryanair
06 Aug - 15 Aug	Saudia
13 Aug - 19 Aug	Wizz Air UK
16 Aug - 26 Aug	Wizz Air UK
13 Aug - 31 Aug	Wizz Air UK

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 524€

Return flights