AirHint found the following cheapest return flights from Atlanta (ATL) to Lisbon (LIS) in October 2025 (see full year).

Return flights

19 Oct - 04 Nov	Air Canada
28 Oct - 05 Nov	Iberia
27 Oct - 04 Nov	Iberia
29 Oct - 06 Nov	Air Canada
30 Oct - 07 Nov	Scandinavian Airlines
27 Oct - 05 Nov	United
22 Oct - 30 Oct	Air Canada
26 Oct - 03 Nov	Air Canada
19 Oct - 08 Nov	Air France
23 Oct - 31 Oct	Frontier Airlines
21 Oct - 29 Oct	Air Canada
18 Oct - 26 Oct	Frontier Airlines
19 Oct - 27 Oct	Air Canada
14 Oct - 22 Oct	Spirit Airlines
24 Oct - 01 Nov	Frontier Airlines
13 Oct - 21 Oct	Frontier Airlines
15 Oct - 23 Oct	Spirit Airlines
20 Oct - 28 Oct	Air Canada
16 Oct - 24 Oct	Air Canada
25 Oct - 02 Nov	Frontier Airlines

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

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 Atlanta to Lisbon in October from 403€

Return flights