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

Return flights

10 Sep - 18 Sep	Ryanair
18 Sep - 22 Sep	Ryanair
02 Sep - 16 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
15 Sep - 18 Sep	Ryanair
16 Sep - 19 Sep	Ryanair
19 Sep - 27 Sep	Ryanair
11 Sep - 16 Sep	Ryanair
04 Sep - 08 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
27 Sep - 04 Oct	Ryanair
29 Sep - 05 Oct	Ryanair
28 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Zagreb to Lisbon 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 Zagreb to Lisbon in September from 147€

Return flights