AirHint found the following cheapest one-way flights from Bangkok (BKK) to Colombo (CMB) in August 2025 (see full year).

One-Way flights

27 Aug	Thai VietJet Air
20 Aug	Thai VietJet Air
11 Aug	AirAsia
29 Aug	Thai AirAsia	direct
27 Aug	Thai AirAsia	direct
21 Aug	Thai AirAsia	direct
09 Aug	Thai AirAsia	direct
28 Aug	AirAsia
05 Aug	Thai AirAsia	direct
22 Aug	Thai AirAsia	direct

Also check the deals for return flights from Bangkok to Colombo 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 one-way flights from Bangkok to Colombo in August from 101€

One-Way flights