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

Return flights

05 May - 12 May	Air Canada
03 May - 17 May	British Airways
17 May - 23 May	Air Canada
15 May - 24 May	Air Canada
18 May - 26 May	Air Canada
19 May - 27 May	Air Canada
20 May - 28 May	Air Canada
28 May - 31 May	Spirit Airlines
24 May - 01 Jun	Spirit Airlines
22 May - 31 May	Spirit Airlines
21 May - 29 May	Air Canada
29 May - 06 Jun	Spirit Airlines
26 May - 03 Jun	Air Canada
27 May - 04 Jun	Air Canada
25 May - 02 Jun	Air Canada
31 May - 08 Jun	TAP
28 May - 05 Jun	Air Canada
30 May - 07 Jun	jetBlue

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

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 May from $610

Return flights