AirHint found the following cheapest return flights from Porto (OPO) to Ljubljana (LJU) in May 2026 (see full year).

Return flights

01 May - 09 May	Ryanair
28 May - 04 Jun	Vueling Airlines
20 May - 25 May	SWISS
21 May - 25 May	SWISS
22 May - 28 May	Ryanair
20 May - 30 May	SWISS
21 May - 26 May	SWISS
19 May - 26 May	SWISS
19 May - 24 May	SWISS
22 May - 27 May	SWISS
23 May - 28 May	SWISS
28 May - 07 Jun	Vueling Airlines
24 May - 07 Jun	Vueling Airlines

Also check the deals for one-way flights from Porto to Ljubljana 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 Porto to Ljubljana in May from 209€

Return flights