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

Return flights

12 Sep - 23 Sep	Ryanair	direct
25 Sep - 07 Oct	Ryanair	direct
05 Sep - 18 Sep	Ryanair
25 Sep - 10 Oct	Ryanair	direct
09 Sep - 13 Sep	Air Serbia
05 Sep - 18 Sep	Ryanair	direct
07 Sep - 20 Sep	Air Serbia
11 Sep - 21 Sep	Air Serbia
12 Sep - 20 Sep	Ryanair
26 Sep - 08 Oct	Aegean Airlines
07 Sep - 23 Sep	SKY express
27 Sep - 07 Oct	SKY express
27 Sep - 10 Oct	SKY express
07 Sep - 12 Sep	SKY express
07 Sep - 20 Sep	Aegean Airlines	direct
26 Sep - 08 Oct	Aegean Airlines	direct

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.

Book a cheap hotel in Thessaloniki

Cheap car rent in Thessaloniki

Cheapest return flights from Frankfurt to Thessaloniki in September from $116

Return flights