AirHint found the following cheapest return flights from Dammam (DMM) to Lisbon (LIS) in September 2025 (see full year).

Return flights

28 Sep - 06 Oct	Flynas
26 Sep - 09 Oct	Flynas
15 Sep - 06 Oct	Flynas
26 Sep - 03 Oct	Flynas
26 Sep - 10 Oct	Flynas
23 Sep - 30 Sep	Pegasus Airlines
21 Sep - 27 Sep	Pegasus Airlines
18 Sep - 23 Sep	Pegasus Airlines
22 Sep - 29 Sep	AJet
16 Sep - 27 Sep	Pegasus Airlines
15 Sep - 23 Sep	AJet
19 Sep - 03 Oct	Pegasus Airlines
21 Sep - 29 Sep	AJet
14 Sep - 27 Sep	Flynas
14 Sep - 17 Sep	Flynas
22 Sep - 30 Sep	Flynas
19 Sep - 05 Oct	Pegasus Airlines
30 Sep - 21 Oct	KLM
21 Sep - 05 Oct	KLM

Also check the deals for one-way flights from Dammam to Lisbon 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 Dammam to Lisbon in September from $366

Return flights