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

Return flights

24 Sep - 01 Oct	Ryanair
18 Sep - 24 Sep	Air Serbia	direct
24 Sep - 28 Sep	Ryanair
18 Sep - 19 Sep	Air Serbia	direct
25 Sep - 29 Sep	Ryanair
25 Sep - 01 Oct	Ryanair
18 Sep - 23 Sep	Air Serbia
24 Sep - 25 Sep	Ryanair
22 Sep - 24 Sep	Ryanair
22 Sep - 03 Oct	Ryanair
25 Sep - 28 Sep	Ryanair
18 Sep - 21 Sep	Air Serbia	direct
24 Sep - 26 Sep	Wizz Air
30 Sep - 05 Oct	Ryanair
26 Sep - 01 Oct	Wizz Air
26 Sep - 06 Oct	Wizz Air
29 Sep - 03 Oct	Ryanair
26 Sep - 05 Oct	Wizz Air
29 Sep - 05 Oct	Ryanair
29 Sep - 06 Oct	Ryanair

Also check the deals for one-way flights from Thessaloniki to Belgrade 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 Belgrade

Cheap car rent in Belgrade

Cheapest return flights from Thessaloniki to Belgrade in September from 166€

Return flights