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

Return flights

27 May - 03 Jun	Transavia France
10 May - 14 May	Ryanair
13 May - 16 May	Ryanair
12 May - 20 May	Ryanair
27 May - 04 Jun	Transavia France
10 May - 15 May	Ryanair
23 May - 31 May	Air Europa
10 May - 12 May	Ryanair
06 May - 09 May	easyJet
12 May - 16 May	Ryanair
29 May - 02 Jun	Transavia France
08 May - 12 May	Ryanair
25 May - 31 May	Ryanair
31 May - 06 Jun	Air Serbia
31 May - 11 Jun	Air Serbia
28 May - 04 Jun	Transavia France
30 May - 08 Jun	Air Europa
29 May - 11 Jun	Transavia France
29 May - 04 Jun	Transavia France
31 May - 10 Jun	Ryanair

Also check the deals for one-way flights from Porto to Athens 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.

Book a cheap hotel in Athens

Cheap car rent in Athens

Cheapest return flights from Porto to Athens in May from $169

Return flights