AirHint found the following cheapest return flights from Riyadh (RUH) to Colombo (CMB) in September 2025 (see full year).

Return flights

10 Sep - 21 Sep	Etihad Airways
13 Sep - 23 Oct	SalamAir
14 Sep - 23 Sep	SalamAir
11 Sep - 22 Sep	Air Arabia
15 Sep - 22 Sep	Air Arabia
18 Sep - 22 Sep	Air Arabia
30 Sep - 07 Oct	Air Arabia
15 Sep - 09 Oct	Air Arabia
10 Sep - 09 Oct	Gulf Air
09 Sep - 07 Oct	Air Arabia
09 Sep - 08 Oct	Air Arabia
08 Sep - 07 Oct	Air Arabia
03 Sep - 10 Oct	Gulf Air
09 Sep - 14 Sep	Gulf Air
11 Sep - 21 Sep	Air Arabia
03 Sep - 14 Sep	Gulf Air
18 Sep - 26 Sep	Air Arabia
26 Sep - 07 Oct	Air Arabia
15 Sep - 11 Oct	Air Arabia
01 Sep - 15 Sep	Gulf Air

Also check the deals for one-way flights from Riyadh to Colombo in September.

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 Riyadh to Colombo in September from $324

Return flights