Cheapest return ATL–LIS flights, September

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

Return flights

28 Sep - 05 Oct Air Canada
28 Sep - 04 Oct Frontier Airlines
30 Sep - 05 Oct Frontier Airlines
16 Sep - 20 Sep Frontier Airlines
02 Sep - 09 Sep Turkish Airlines
29 Sep - 06 Oct Turkish Airlines
01 Sep - 09 Sep Turkish Airlines
02 Sep - 10 Sep Turkish Airlines
15 Sep - 24 Sep Frontier Airlines
14 Sep - 30 Sep Frontier Airlines
07 Sep - 18 Sep Turkish Airlines
11 Sep - 26 Sep Frontier Airlines
11 Sep - 18 Sep Frontier Airlines
12 Sep - 19 Sep Turkish Airlines

Also check the deals for one-way flights from Atlanta to Lisbon in September.

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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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