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

Return flights

04 May - 30 May	Turkish Airlines
06 May - 30 May	Turkish Airlines
10 May - 30 May	Turkish Airlines
01 May - 23 May	Turkish Airlines
08 May - 30 May	Turkish Airlines
12 May - 06 Jun	Turkish Airlines
14 May - 06 Jun	Turkish Airlines
20 May - 13 Jun	WestJet
16 May - 06 Jun	WestJet
22 May - 13 Jun	WestJet
23 May - 13 Jun	WestJet
18 May - 13 Jun	Scandinavian Airlines

Also check the deals for one-way flights from Atlanta to Porto 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 Porto in May from 643€

Return flights