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

Return flights

28 Aug - 09 Sep	Brussels Airlines
28 Aug - 03 Sep	Brussels Airlines
26 Aug - 03 Sep	SWISS
29 Aug - 05 Sep	Brussels Airlines
20 Aug - 05 Sep	easyJet	direct
26 Aug - 04 Sep	KLM
25 Aug - 10 Sep	TAP
29 Aug - 05 Sep	easyJet	direct
25 Aug - 08 Sep	KLM
25 Aug - 02 Sep	KLM
26 Aug - 30 Aug	Lufthansa
25 Aug - 30 Aug	Lufthansa
24 Aug - 30 Aug	Lufthansa
21 Aug - 29 Aug	TAP	direct
23 Aug - 24 Aug	Lufthansa
24 Aug - 28 Aug	Lufthansa
25 Aug - 29 Aug	Lufthansa
22 Aug - 29 Aug	easyJet	direct
20 Aug - 22 Aug	easyJet	direct
20 Aug - 29 Aug	easyJet	direct

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 $254

Return flights