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

Return flights

30 Sep - 08 Oct	Wizz Air
27 Sep - 01 Oct	Wizz Air
25 Sep - 01 Oct	Ryanair
29 Sep - 01 Oct	Wizz Air
30 Sep - 07 Oct	Ryanair
27 Sep - 03 Oct	Wizz Air
27 Sep - 30 Sep	Wizz Air
27 Sep - 04 Oct	Wizz Air
22 Sep - 01 Oct	Wizz Air
24 Sep - 01 Oct	easyJet
30 Sep - 03 Oct	Ryanair
20 Sep - 23 Sep	Air Serbia
17 Sep - 20 Sep	Ryanair
27 Sep - 29 Sep	Wizz Air
16 Sep - 23 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
20 Sep - 25 Sep	Wizz Air
17 Sep - 23 Sep	Ryanair
18 Sep - 23 Sep	Wizz Air
23 Sep - 30 Sep	easyJet

Also check the deals for one-way flights from Sofia 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 Sofia to Lisbon in September from 149€

Return flights