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

Return flights

04 Sep - 13 Sep	Air India
20 Sep - 27 Sep	Air India
06 Sep - 13 Sep	Air India
09 Sep - 11 Sep	Air India
18 Sep - 27 Sep	Air India
27 Sep - 23 Oct	Air India
04 Sep - 11 Sep	Air India
27 Sep - 05 Oct	Air India
27 Sep - 07 Oct	Air India
27 Sep - 11 Oct	Air India
27 Sep - 09 Oct	Air India
11 Sep - 13 Sep	Air India
26 Sep - 06 Oct	Cathay Pacific
13 Sep - 15 Sep	IndiGo
26 Sep - 28 Sep	IndiGo
27 Sep - 29 Sep	IndiGo
27 Sep - 10 Oct	Air India
26 Sep - 05 Oct	IndiGo
27 Sep - 06 Oct	IndiGo
26 Sep - 22 Oct	Qatar Airways

Also check the deals for one-way flights from Hong Kong to Riyadh 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 Hong Kong to Riyadh in September from $413

Return flights