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

Return flights

30 Sep - 01 Oct	easyJet
25 Sep - 01 Oct	Ryanair
29 Sep - 01 Oct	Wizz Air
24 Sep - 01 Oct	Ryanair
25 Sep - 31 Oct	Wizz Air
22 Sep - 01 Oct	Wizz Air
29 Sep - 07 Oct	Wizz Air
20 Sep - 24 Sep	Ryanair
23 Sep - 30 Sep	Wizz Air
27 Sep - 04 Oct	Ryanair
18 Sep - 24 Sep	Ryanair
21 Sep - 01 Oct	Ryanair
30 Sep - 30 Sep	Ryanair
20 Sep - 28 Sep	Wizz Air
18 Sep - 23 Sep	Ryanair
26 Sep - 03 Oct	Wizz Air
22 Sep - 30 Sep	Wizz Air
16 Sep - 24 Sep	Wizz Air
20 Sep - 23 Sep	Ryanair
26 Sep - 30 Sep	Wizz Air

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Sofia to Lisbon in September from $134

Return flights