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

Return flights

28 Aug - 12 Sep	SalamAir
21 Aug - 06 Sep	SalamAir
31 Aug - 31 Aug	Flynas
19 Aug - 26 Aug	SalamAir
30 Aug - 14 Sep	Flynas	direct
21 Aug - 28 Aug	SalamAir
31 Aug - 12 Sep	SalamAir
30 Aug - 31 Aug	Flynas	direct
29 Aug - 31 Aug	SalamAir
30 Aug - 06 Sep	Flynas
30 Aug - 30 Aug	Flynas
21 Aug - 16 Sep	SalamAir
24 Aug - 31 Aug	SalamAir
20 Aug - 21 Aug	SalamAir
19 Aug - 20 Aug	SalamAir
24 Aug - 26 Aug	SalamAir
31 Aug - 05 Sep	Flynas	direct
31 Aug - 12 Sep	Flynas	direct
20 Aug - 16 Sep	SalamAir
28 Aug - 12 Sep	Fly Jinnah	direct

Also check the deals for one-way flights from Islamabad to Riyadh 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 Islamabad to Riyadh in August from 280€

Return flights