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

Return flights

16 Sep - 24 Sep	easyJet
22 Sep - 30 Sep	easyJet
17 Sep - 24 Sep	easyJet
15 Sep - 22 Sep	Wizz Air Malta
30 Sep - 01 Oct	easyJet
29 Sep - 16 Oct	easyJet	direct
24 Sep - 01 Oct	easyJet
27 Sep - 01 Oct	easyJet
10 Sep - 17 Sep	easyJet
24 Sep - 15 Oct	easyJet
27 Sep - 30 Sep	easyJet
29 Sep - 06 Oct	easyJet
26 Sep - 30 Sep	easyJet
21 Sep - 16 Oct	easyJet
24 Sep - 02 Oct	easyJet
03 Sep - 02 Oct	easyJet
29 Sep - 02 Oct	easyJet
17 Sep - 22 Sep	easyJet
16 Sep - 18 Sep	easyJet
10 Sep - 16 Sep	easyJet

Also check the deals for one-way flights from Athens 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 Athens to Lisbon in September from 141€

Return flights