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

Return flights

25 Sep - 30 Sep	Spring Airlines
19 Sep - 25 Sep	Cathay Pacific
14 Sep - 18 Sep	Thai AirAsia X
14 Sep - 20 Sep	Thai AirAsia X
14 Sep - 21 Sep	Thai AirAsia X
14 Sep - 28 Sep	Thai AirAsia X
10 Sep - 18 Sep	AirAsia X
14 Sep - 01 Oct	Thai AirAsia X
14 Sep - 24 Sep	Thai AirAsia X
14 Sep - 23 Sep	Thai AirAsia X
10 Sep - 20 Sep	AirAsia X
14 Sep - 02 Oct	Thai AirAsia X
25 Sep - 13 Oct	Thai AirAsia X
27 Sep - 02 Oct	China Eastern
19 Sep - 01 Oct	AirAsia X
25 Sep - 01 Oct	Thai AirAsia X
19 Sep - 02 Oct	AirAsia X
25 Sep - 02 Oct	Thai AirAsia X
18 Sep - 01 Oct	Thai AirAsia X
14 Sep - 03 Oct	Thai AirAsia X

Also check the deals for one-way flights from Shanghai 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 Shanghai to Colombo in September from 334€

Return flights