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

Return flights

30 Aug - 22 Sep	Etihad Airways
29 Aug - 20 Sep	KLM
30 Aug - 20 Sep	Etihad Airways
21 Aug - 28 Aug	TUI
20 Aug - 27 Aug	KLM
25 Aug - 09 Sep	Singapore Airlines
31 Aug - 12 Sep	Singapore Airlines
26 Aug - 10 Sep	Singapore Airlines
27 Aug - 10 Sep	Singapore Airlines

Also check the deals for one-way flights from Cardiff 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 Cardiff to Bangkok in August from 700€

Return flights