AirHint found the following cheapest return flights from Lisbon (LIS) to Athens (ATH) in September 2026 (see full year).

Return flights

20 Sep - 26 Sep	TAP	direct
19 Sep - 26 Sep	TAP	direct
17 Sep - 26 Sep	TAP	direct
23 Sep - 03 Oct	TAP	direct
20 Sep - 03 Oct	TAP	direct
18 Sep - 28 Sep	Ryanair
25 Sep - 05 Oct	TAP	direct
12 Sep - 17 Sep	TAP	direct
11 Sep - 18 Sep	TAP	direct
21 Sep - 26 Sep	Vueling Airlines
20 Sep - 27 Sep	TAP	direct
22 Sep - 26 Sep	Ryanair
18 Sep - 05 Oct	TAP	direct
05 Sep - 11 Sep	TAP
26 Sep - 06 Oct	easyJet
28 Sep - 13 Oct	Vueling Airlines
28 Sep - 14 Oct	Vueling Airlines
28 Sep - 15 Oct	Vueling Airlines
28 Sep - 01 Oct	Vueling Airlines
22 Sep - 01 Oct	Vueling Airlines

Also check the deals for one-way flights from Lisbon to Athens 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 Lisbon to Athens in September from $163

Return flights