AirHint found the following cheapest return flights from Stuttgart (STR) to Thessaloniki (SKG) in September 2026 (see full year).

Return flights

13 Sep - 23 Sep	Air Serbia
19 Sep - 05 Oct	Aegean Airlines
16 Sep - 23 Sep	Air Serbia
16 Sep - 25 Sep	Air Serbia
29 Sep - 09 Oct	Aegean Airlines
12 Sep - 28 Sep	Eurowings
11 Sep - 14 Sep	Eurowings
19 Sep - 28 Sep	Aegean Airlines
16 Sep - 24 Sep	Aegean Airlines
08 Sep - 23 Sep	Aegean Airlines	direct
16 Sep - 23 Sep	Aegean Airlines	direct
16 Sep - 24 Sep	Aegean Airlines	direct
29 Sep - 09 Oct	Aegean Airlines	direct
19 Sep - 05 Oct	Aegean Airlines	direct

Also check the deals for one-way flights from Stuttgart to Thessaloniki 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 Stuttgart to Thessaloniki in September from 134€

Return flights