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

One-Way flights

25 Jul	Thai AirAsia	direct
29 Jul	Thai AirAsia	direct
22 Jul	Thai AirAsia	direct
15 Jul	Thai AirAsia	direct
21 Jul	Thai AirAsia	direct
16 Jul	Thai AirAsia	direct
31 Jul	Thai AirAsia	direct
11 Jul	Thai AirAsia	direct
12 Jul	Thai AirAsia	direct
20 Jul	Thai AirAsia	direct

Also check the deals for return flights from Bangkok to Colombo in July.

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 July from 107€

One-Way flights