AirHint found the following cheapest return flights from Kathmandu (KTM) to Guangzhou (CAN) in September 2025 (see full year).

Return flights

25 Sep - 03 Oct	China Southern	direct
25 Sep - 29 Sep	Thai AirAsia
30 Sep - 12 Oct	Thai Airways
17 Sep - 23 Sep	China Southern	direct
25 Sep - 02 Oct	Thai AirAsia
25 Sep - 26 Sep	Thai AirAsia
25 Sep - 26 Sep	China Southern	direct
25 Sep - 28 Sep	Thai Airways
20 Sep - 27 Sep	Thai Airways
17 Sep - 21 Sep	Thai Airways
18 Sep - 25 Sep	Thai Airways
17 Sep - 25 Sep	Thai Airways
25 Sep - 29 Sep	China Southern	direct

Also check the deals for one-way flights from Kathmandu to Guangzhou 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 Kathmandu to Guangzhou in September from 404€

Return flights