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

Return flights

27 May - 31 May	Vueling Airlines
20 May - 27 May	Vueling Airlines
06 May - 12 May	Ryanair
10 May - 16 May	Ryanair
08 May - 19 May	Ryanair
13 May - 26 May	Ryanair
06 May - 26 May	Ryanair
05 May - 10 May	Vueling Airlines
10 May - 14 May	Ryanair
13 May - 19 May	Ryanair
29 May - 04 Jun	Ryanair
27 May - 02 Jun	Ryanair
30 May - 08 Jun	Air Europa
31 May - 09 Jun	Air Serbia
27 May - 09 Jun	Ryanair
30 May - 04 Jun	TAP
19 May - 04 Jun	Vueling Airlines
20 May - 04 Jun	Vueling Airlines
28 May - 04 Jun	Vueling Airlines
28 May - 01 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.

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Cheapest return flights from Porto to Athens in May from 145€

Return flights