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

One-Way flights

08 Dec	Thai AirAsia	direct
12 Dec	Thai AirAsia	direct
06 Dec	Thai AirAsia	direct
03 Dec	Thai AirAsia	direct
21 Dec	Thai AirAsia	direct
26 Dec	Thai AirAsia	direct
28 Dec	Thai AirAsia	direct
13 Dec	Thai AirAsia	direct
25 Dec	Thai AirAsia	direct
22 Dec	Thai AirAsia	direct

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

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 December from $128

One-Way flights