AirHint found the following cheapest return flights from Chiang Mai (CNX) to Colombo (CMB) in July 2025 (see full year).

Return flights

19 Jul - 28 Jul	Thai AirAsia
15 Jul - 28 Jul	Thai AirAsia
19 Jul - 26 Jul	Thai AirAsia
11 Jul - 28 Jul	Thai AirAsia
15 Jul - 26 Jul	Thai AirAsia
15 Jul - 16 Jul	Thai AirAsia
11 Jul - 26 Jul	Thai AirAsia
19 Jul - 01 Aug	Thai AirAsia
11 Jul - 16 Jul	Thai AirAsia
10 Jul - 28 Jul	Thai AirAsia
15 Jul - 01 Aug	Thai AirAsia
26 Jul - 09 Aug	Thai AirAsia
26 Jul - 28 Jul	Thai AirAsia
26 Jul - 01 Aug	Thai AirAsia
14 Jul - 01 Aug	Thai AirAsia
12 Jul - 01 Aug	Thai AirAsia
28 Jul - 01 Aug	Thai AirAsia
28 Jul - 09 Aug	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai 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 return flights from Chiang Mai to Colombo in July from $423

Return flights