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

Return flights

27 Aug - 15 Sep	Air India
27 Aug - 20 Sep	Air India
31 Aug - 28 Sep	Air India
17 Aug - 14 Sep	Air India
17 Aug - 15 Sep	Air India
24 Aug - 13 Sep	Air India
18 Aug - 15 Sep	Air India
20 Aug - 16 Sep	Air India
31 Aug - 14 Sep	Air India
25 Aug - 24 Sep	Air India
11 Aug - 14 Aug	Aegean Airlines
11 Aug - 31 Aug	Aegean Airlines
11 Aug - 25 Aug	Aegean Airlines
09 Aug - 18 Aug	Malaysia Airlines
12 Aug - 28 Aug	KLM
21 Aug - 29 Aug	Turkish Airlines
21 Aug - 31 Aug	Turkish Airlines
27 Aug - 31 Aug	SWISS
12 Aug - 16 Aug	Saudia
27 Aug - 29 Aug	Oman Air

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 491€

Return flights