AirHint found the following cheapest return flights from Thessaloniki (SKG) to Porto (OPO) in August 2025 (see full year).

Return flights

14 Aug - 21 Aug	Air Serbia
21 Aug - 31 Aug	Air Serbia
21 Aug - 24 Aug	Air Serbia
28 Aug - 31 Aug	Ryanair
28 Aug - 04 Sep	Ryanair
29 Aug - 31 Aug	Wizz Air
01 Aug - 07 Aug	Ryanair
15 Aug - 21 Aug	Air Serbia
01 Aug - 04 Aug	Air Serbia
19 Aug - 24 Aug	Ryanair
14 Aug - 19 Aug	Air Serbia
30 Aug - 06 Sep	Ryanair

Also check the deals for one-way flights from Thessaloniki to Porto in August.

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 August from $319

Return flights