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

Return flights

31 Jul - 21 Aug	Turkish Airlines
24 Jul - 24 Aug	United
16 Jul - 14 Aug	Frontier Airlines
26 Jul - 07 Aug	Frontier Airlines
27 Jul - 31 Jul	Frontier Airlines
17 Jul - 25 Jul	Spirit Airlines
28 Jul - 04 Aug	Spirit Airlines
19 Jul - 24 Jul	Spirit Airlines
22 Jul - 27 Jul	jetBlue
17 Jul - 26 Jul	Frontier Airlines
13 Jul - 20 Jul	Spirit Airlines
20 Jul - 23 Jul	Spirit Airlines
19 Jul - 22 Jul	Frontier Airlines
11 Jul - 18 Jul	Frontier Airlines
18 Jul - 26 Jul	Frontier Airlines

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

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 July from $757

Return flights