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

Return flights

30 Sep - 22 Oct	Thai AirAsia
29 Sep - 06 Oct	Etihad Airways
30 Sep - 11 Oct	Thai Lion Air
30 Sep - 07 Oct	Thai Lion Air
23 Sep - 30 Sep	Etihad Airways
28 Sep - 09 Oct	Thai VietJet Air
25 Sep - 27 Sep	Etihad Airways
23 Sep - 26 Sep	Etihad Airways
22 Sep - 29 Sep	Etihad Airways
27 Sep - 09 Oct	IndiGo
30 Sep - 07 Oct	Saudia	direct
25 Sep - 27 Sep	Saudia	direct
23 Sep - 30 Sep	Saudia	direct
20 Sep - 27 Sep	Saudia	direct
27 Sep - 09 Oct	Saudia	direct
30 Sep - 11 Oct	Saudia	direct

Also check the deals for one-way flights from Bangkok 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 Bangkok to Riyadh in September from $406

Return flights