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

Return flights

28 May - 07 Jun	Vueling Airlines
28 May - 03 Jun	Vueling Airlines
29 May - 07 Jun	Air Serbia
29 May - 11 Jun	Air Serbia
09 May - 14 May	Air Serbia
01 May - 10 May	Air Serbia
05 May - 14 May	Air Serbia
07 May - 10 May	Vueling Airlines
15 May - 21 May	Air Serbia
30 May - 02 Jun	Lufthansa
28 May - 08 Jun	Vueling Airlines
26 May - 07 Jun	Air Serbia
29 May - 03 Jun	SWISS
29 May - 02 Jun	SWISS
16 May - 20 May	SWISS
29 May - 08 Jun	Air Serbia
16 May - 24 May	Air Serbia
08 May - 17 May	Air Serbia
24 May - 30 May	SWISS
11 May - 14 May	KLM

Also check the deals for one-way flights from Ljubljana to Lisbon 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 Ljubljana to Lisbon in May from $186

Return flights