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

One-Way flights

12 Dec	Thai AirAsia	direct
01 Dec	Thai AirAsia	direct
02 Dec	Thai AirAsia	direct
10 Dec	Thai AirAsia	direct
11 Dec	Thai AirAsia	direct
06 Dec	Thai AirAsia	direct
15 Dec	Thai AirAsia	direct
17 Dec	Thai AirAsia	direct
14 Dec	Thai AirAsia	direct
28 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.

Book a cheap hotel in Colombo

Cheap car rent in Colombo

Cheapest one-way flights from Bangkok to Colombo in December from 109€

One-Way flights