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

Return flights

26 Aug - 04 Sep	Flynas
28 Aug - 05 Sep	SWISS
30 Aug - 03 Sep	Flynas
26 Aug - 02 Sep	Flynas
26 Aug - 10 Sep	Flynas
28 Aug - 04 Sep	SWISS
28 Aug - 20 Sep	Flynas
28 Aug - 10 Sep	SWISS
21 Aug - 05 Sep	SWISS
28 Aug - 06 Sep	Flynas
26 Aug - 31 Aug	Flynas
18 Aug - 26 Aug	Flynas
28 Aug - 30 Aug	Flynas
19 Aug - 26 Aug	Flynas
22 Aug - 29 Aug	Flynas
23 Aug - 31 Aug	Flynas
25 Aug - 30 Aug	Flynas
20 Aug - 27 Aug	SWISS
22 Aug - 30 Aug	Flynas
19 Aug - 30 Aug	Flynas

Also check the deals for one-way flights from Riyadh to Lisbon 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 Lisbon in August from 402€

Return flights