AirHint found the following cheapest return flights from Thessaloniki (SKG) to Madrid (MAD) in September 2025 (see full year).

Return flights

30 Sep - 04 Oct	Aegean Airlines
17 Sep - 24 Sep	Ryanair
11 Sep - 17 Sep	Ryanair
11 Sep - 18 Sep	Ryanair
26 Sep - 29 Sep	Wizz Air
19 Sep - 24 Sep	Ryanair
22 Sep - 26 Sep	Ryanair
19 Sep - 29 Sep	Ryanair
24 Sep - 30 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
27 Sep - 03 Oct	Ryanair
29 Sep - 03 Oct	Ryanair
27 Sep - 02 Oct	Ryanair
30 Sep - 03 Oct	Aegean Airlines
29 Sep - 06 Oct	Ryanair
09 Sep - 04 Oct	Ryanair

Also check the deals for one-way flights from Thessaloniki to Madrid in September.

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 Madrid in September from 131€

Return flights