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

Return flights

28 Aug - 02 Sep	easyJet
28 Aug - 03 Sep	easyJet
26 Aug - 16 Sep	Vueling Airlines
30 Aug - 15 Sep	easyJet
28 Aug - 08 Sep	easyJet
28 Aug - 13 Sep	Ryanair
28 Aug - 12 Sep	easyJet
26 Aug - 02 Sep	Vueling Airlines
21 Aug - 04 Sep	easyJet
25 Aug - 04 Sep	Vueling Airlines
21 Aug - 28 Aug	easyJet	direct
25 Aug - 28 Aug	Ryanair
21 Aug - 25 Aug	Iberia
05 Aug - 14 Aug	Vueling Airlines
11 Aug - 14 Aug	Wizz Air
11 Aug - 21 Aug	Wizz Air
14 Aug - 21 Aug	easyJet	direct
21 Aug - 26 Aug	easyJet
28 Aug - 31 Aug	Ryanair
26 Aug - 31 Aug	Vueling Airlines

Also check the deals for one-way flights from Lisbon to Athens 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 Lisbon to Athens in August from $245

Return flights