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

Return flights

27 Aug - 10 Sep	ITA Airways
21 Aug - 24 Sep	KLM
30 Aug - 24 Sep	KLM
27 Aug - 25 Sep	KLM
21 Aug - 25 Sep	KLM
28 Aug - 10 Sep	ITA Airways
26 Aug - 26 Sep	ITA Airways
26 Aug - 10 Sep	ITA Airways
28 Aug - 08 Sep	ITA Airways
26 Aug - 17 Sep	ITA Airways
20 Aug - 27 Aug	KLM
20 Aug - 26 Aug	KLM
19 Aug - 26 Aug	KLM
19 Aug - 28 Aug	KLM
21 Aug - 27 Aug	KLM
13 Aug - 20 Aug	Lufthansa
26 Aug - 30 Aug	British Airways
13 Aug - 27 Aug	KLM
22 Aug - 26 Aug	KLM
22 Aug - 27 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from London to Bangkok in August from $679

Return flights