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

Return flights

01 Oct - 08 Oct	Ryanair
15 Oct - 18 Oct	Ryanair
17 Oct - 20 Oct	easyJet
04 Oct - 08 Oct	Vueling Airlines
06 Oct - 13 Oct	Vueling Airlines
13 Oct - 15 Oct	Vueling Airlines
01 Oct - 04 Oct	Ryanair
07 Oct - 11 Oct	Vueling Airlines
04 Oct - 11 Oct	Vueling Airlines
03 Oct - 05 Oct	easyJet

Also check the deals for one-way flights from Lisbon to Sofia in October.

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 Lisbon to Sofia in October from 131€

Return flights