AirHint found the following cheapest return flights from London (LHR) to Bangkok (BKK) in August 2025 (see full year).

Return flights

27 Aug - 09 Sep	British Airways
24 Aug - 07 Sep	Brussels Airlines
29 Aug - 12 Sep	Emirates
30 Aug - 06 Sep	Shenzhen Airlines
29 Aug - 07 Sep	Shenzhen Airlines
30 Aug - 11 Sep	Shenzhen Airlines
30 Aug - 12 Sep	Shenzhen Airlines
31 Aug - 10 Sep	Shenzhen Airlines
29 Aug - 05 Sep	Shenzhen Airlines
29 Aug - 06 Sep	Shenzhen Airlines
07 Aug - 12 Aug	KLM
05 Aug - 10 Aug	KLM
06 Aug - 09 Aug	KLM
08 Aug - 13 Aug	KLM
11 Aug - 13 Aug	KLM
08 Aug - 16 Aug	KLM
05 Aug - 14 Aug	KLM
06 Aug - 14 Aug	KLM
07 Aug - 14 Aug	KLM
05 Aug - 15 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 $466

Return flights