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

Return flights

27 Sep - 09 Oct	Ryanair
27 Sep - 13 Oct	Ryanair	direct
20 Sep - 09 Oct	Ryanair
27 Sep - 16 Oct	Ryanair	direct
27 Sep - 05 Oct	Ryanair
27 Sep - 09 Oct	Ryanair	direct
27 Sep - 06 Oct	Ryanair
27 Sep - 02 Oct	Ryanair
27 Sep - 10 Oct	Ryanair	direct
27 Sep - 14 Oct	Ryanair
20 Sep - 25 Sep	Ryanair
20 Sep - 30 Sep	Ryanair
20 Sep - 24 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
20 Sep - 29 Sep	Ryanair
20 Sep - 28 Sep	Ryanair
20 Sep - 22 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
20 Sep - 23 Sep	Ryanair
23 Sep - 25 Sep	Ryanair

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Thessaloniki in September from $117

Return flights