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

Return flights

29 Aug - 09 Sep	Air China
31 Aug - 22 Sep	SWISS
28 Aug - 19 Sep	SWISS
31 Aug - 14 Sep	SWISS
28 Aug - 10 Sep	SWISS
30 Aug - 13 Sep	SWISS
21 Aug - 19 Sep	SWISS
17 Aug - 17 Sep	SWISS
23 Aug - 13 Sep	Air France
20 Aug - 25 Aug	Saudia
24 Aug - 08 Sep	Saudia
18 Aug - 31 Aug	Aegean Airlines
13 Aug - 18 Aug	Saudia
11 Aug - 18 Aug	Saudia
13 Aug - 31 Aug	Eurowings
17 Aug - 31 Aug	Malaysia Airlines
20 Aug - 31 Aug	Malaysia Airlines
21 Aug - 31 Aug	Malaysia Airlines
19 Aug - 26 Aug	Malaysia Airlines
09 Aug - 19 Aug	Air Serbia

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 521€

Return flights