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

Return flights

05 May - 08 May	Ryanair
26 May - 05 Jun	Ryanair
27 May - 30 May	KLM
09 May - 12 May	Ryanair
02 May - 06 May	Ryanair
11 May - 15 May	Lufthansa
05 May - 09 May	Ryanair
06 May - 12 May	KLM
05 May - 11 May	Ryanair
26 May - 02 Jun	Ryanair
12 May - 16 May	Ryanair
26 May - 04 Jun	Ryanair
06 May - 10 May	Ryanair
29 May - 02 Jun	KLM
29 May - 01 Jun	Ryanair
30 May - 02 Jun	Ryanair
28 May - 01 Jun	Aegean Airlines
29 May - 03 Jun	Ryanair
28 May - 02 Jun	easyJet

Also check the deals for one-way flights from Thessaloniki 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 Thessaloniki to Porto in May from $162

Return flights