AirHint found the following cheapest return flights from Lisbon (LIS) to Sofia (SOF) in May 2026 (see full year).

Return flights

27 May - 03 Jun	Ryanair
19 May - 22 May	Ryanair
15 May - 19 May	Ryanair
20 May - 23 May	Ryanair
27 May - 30 May	Ryanair
01 May - 04 May	easyJet
20 May - 07 Jun	Transavia France
23 May - 27 May	Vueling Airlines
16 May - 20 May	easyJet
02 May - 04 May	Ryanair
20 May - 27 May	SKY express
10 May - 13 May	SKY express
20 May - 03 Jun	SKY express
24 May - 03 Jun	SKY express
27 May - 10 Jun	SKY express
20 May - 10 Jun	SKY express
24 May - 10 Jun	SKY express
27 May - 17 Jun	SKY express

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

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 May from $168

Return flights