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

Return flights

21 Sep - 30 Sep	Pegasus Airlines
24 Sep - 04 Oct	Pegasus Airlines
07 Sep - 13 Sep	Pegasus Airlines
11 Sep - 13 Sep	Pegasus Airlines
09 Sep - 11 Sep	Pegasus Airlines
10 Sep - 13 Sep	Pegasus Airlines
02 Sep - 04 Sep	Pegasus Airlines
02 Sep - 03 Sep	Pegasus Airlines
01 Sep - 05 Sep	Pegasus Airlines
20 Sep - 27 Sep	Turkish Airlines
01 Sep - 03 Sep	Etihad Airways
24 Sep - 04 Oct	Qatar Airways	direct
24 Sep - 01 Oct	TAP

Also check the deals for one-way flights from Doha 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 Doha to Lisbon in September from $492

Return flights