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

Return flights

26 Aug - 31 Aug	Ryanair
28 Aug - 03 Sep	Ryanair
22 Aug - 31 Aug	Ryanair
26 Aug - 02 Sep	Ryanair
07 Aug - 13 Aug	Lufthansa
25 Aug - 31 Aug	Ryanair
28 Aug - 04 Sep	Ryanair
28 Aug - 01 Sep	Lufthansa
31 Aug - 09 Sep	Ryanair
26 Aug - 28 Aug	Ryanair
11 Aug - 15 Aug	Lufthansa
29 Aug - 07 Sep	Ryanair
23 Aug - 02 Sep	Ryanair
25 Aug - 02 Sep	Ryanair
07 Aug - 10 Aug	Lufthansa
25 Aug - 27 Aug	Ryanair
24 Aug - 28 Aug	Lufthansa
07 Aug - 14 Aug	Lufthansa

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

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 August from $237

Return flights