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

Return flights

23 Sep - 27 Sep	Ryanair
16 Sep - 25 Sep	Norwegian Air Sweden AOC
01 Sep - 28 Sep	airBaltic
13 Sep - 25 Sep	Norwegian Air Sweden AOC
15 Sep - 24 Sep	Norwegian Air Sweden AOC
26 Sep - 10 Oct	Ryanair
08 Sep - 22 Sep	Ryanair
24 Sep - 04 Oct	Turkish Airlines
26 Sep - 04 Oct	Turkish Airlines
27 Sep - 04 Oct	Turkish Airlines

Also check the deals for one-way flights from Riga 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 Riga to Colombo in September from 556€

Return flights