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

Return flights

22 Oct - 28 Oct	Ryanair
22 Oct - 29 Oct	Ryanair
31 Oct - 03 Nov	Vueling Airlines
01 Oct - 06 Oct	Ryanair
15 Oct - 22 Oct	Ryanair
15 Oct - 29 Oct	Ryanair
01 Oct - 10 Oct	Vueling Airlines
15 Oct - 23 Oct	Ryanair
15 Oct - 19 Oct	Ryanair
15 Oct - 25 Oct	Ryanair
08 Oct - 12 Oct	Ryanair
30 Oct - 02 Nov	Ryanair

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 93€

Return flights