AirHint found the following cheapest return flights from Seoul (ICN) to Colombo (CMB) in April 2026 (see full year).

Return flights

09 Apr - 15 Apr	Air India
11 Apr - 18 Apr	Air India
30 Apr - 06 May	Air India
30 Apr - 07 May	Air India
11 Apr - 19 Apr	AirAsia X
07 Apr - 14 Apr	AirAsia X
10 Apr - 18 Apr	AirAsia X
30 Apr - 30 May	Air India
29 Apr - 05 May	SriLankan Airlines	direct
29 Apr - 03 May	SriLankan Airlines	direct
13 Apr - 11 May	AirAsia X
29 Apr - 30 May	Malaysia Airlines
06 Apr - 09 Apr	Thai Airways
15 Apr - 22 Apr	Thai Airways
06 Apr - 21 Apr	Thai Airways
13 Apr - 21 Apr	AirAsia X
06 Apr - 12 Apr	Thai Airways

Also check the deals for one-way flights from Seoul to Colombo in April.

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 Seoul to Colombo in April from $458

Return flights