AirHint found the following cheapest return flights from Riyadh (RUH) to Singapore (SIN) in August 2025 (see full year).

Return flights

22 Aug - 06 Sep	IndiGo
30 Aug - 04 Sep	flyadeal
26 Aug - 03 Sep	SalamAir
28 Aug - 03 Sep	Flynas
25 Aug - 02 Sep	Air India Express
20 Aug - 03 Sep	Air India
27 Aug - 04 Sep	Air India Express
27 Aug - 01 Sep	Air India Express
20 Aug - 27 Aug	IndiGo
22 Aug - 27 Aug	Air India Express
18 Aug - 31 Aug	IndiGo
21 Aug - 28 Aug	Flynas
22 Aug - 29 Aug	IndiGo
22 Aug - 30 Aug	Air India Express
26 Aug - 30 Aug	SalamAir
17 Aug - 22 Aug	flyadeal
21 Aug - 24 Aug	China Southern

Also check the deals for one-way flights from Riyadh to Singapore in August.

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 Riyadh to Singapore in August from $416

Return flights