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

Return flights

25 Aug - 03 Sep	Eurowings
29 Aug - 04 Sep	Brussels Airlines
27 Aug - 02 Sep	SWISS
26 Aug - 04 Sep	SWISS
25 Aug - 03 Sep	TAP	direct
20 Aug - 11 Sep	Ryanair
20 Aug - 10 Sep	Ryanair
25 Aug - 10 Sep	TAP	direct
27 Aug - 12 Sep	SWISS
27 Aug - 03 Sep	SWISS
26 Aug - 30 Aug	KLM
26 Aug - 29 Aug	KLM
19 Aug - 26 Aug	Ryanair
20 Aug - 27 Aug	Lufthansa
19 Aug - 29 Aug	Ryanair
21 Aug - 26 Aug	KLM
13 Aug - 20 Aug	KLM
27 Aug - 30 Aug	Ryanair
28 Aug - 30 Aug	Ryanair
25 Aug - 27 Aug	easyJet

Also check the deals for one-way flights from Prague 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 Prague to Lisbon in August from 156€

Return flights