AirHint found the following cheapest return flights from Lisbon (LIS) to Zagreb (ZAG) in September 2025 (see full year).

Return flights

18 Sep - 01 Oct	Ryanair
26 Sep - 29 Sep	Ryanair
18 Sep - 02 Oct	Ryanair
09 Sep - 13 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
18 Sep - 19 Sep	Ryanair
12 Sep - 18 Sep	Ryanair
15 Sep - 19 Sep	Ryanair
04 Sep - 09 Sep	KLM
17 Sep - 20 Sep	Ryanair
05 Sep - 12 Sep	Ryanair
27 Sep - 05 Oct	easyJet

Also check the deals for one-way flights from Lisbon to Zagreb in September.

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 Zagreb in September from $188

Return flights