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

Return flights

26 Sep - 04 Oct	Etihad Airways
25 Sep - 29 Sep	Etihad Airways
25 Sep - 05 Oct	Cathay Pacific
27 Sep - 10 Oct	IndiGo
30 Sep - 06 Oct	flyadeal
30 Sep - 11 Oct	Oman Air
26 Sep - 16 Oct	Oman Air
26 Sep - 06 Oct	flyadeal
30 Sep - 09 Oct	Oman Air
30 Sep - 16 Oct	SriLankan Airlines
28 Sep - 07 Oct	SriLankan Airlines
25 Sep - 30 Sep	Oman Air
22 Sep - 30 Sep	Oman Air
22 Sep - 29 Sep	Etihad Airways
21 Sep - 24 Sep	Etihad Airways
25 Sep - 28 Sep	Etihad Airways
23 Sep - 28 Sep	Etihad Airways
21 Sep - 28 Sep	Etihad Airways
22 Sep - 27 Sep	Etihad Airways
21 Sep - 27 Sep	Etihad Airways

Also check the deals for one-way flights from Riyadh to Bangkok 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Riyadh to Bangkok in September from 302€

Return flights