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

Return flights

26 Sep - 30 Sep	Wizz Air
24 Sep - 26 Sep	Ryanair
25 Sep - 29 Sep	Ryanair
23 Sep - 21 Oct	easyJet	direct
23 Sep - 26 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
18 Sep - 16 Oct	Ryanair
23 Sep - 14 Oct	easyJet	direct
25 Sep - 27 Sep	Ryanair
18 Sep - 25 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
23 Sep - 25 Oct	easyJet	direct
25 Sep - 28 Sep	Ryanair
23 Sep - 18 Oct	easyJet	direct
30 Sep - 14 Oct	easyJet	direct
23 Sep - 07 Oct	easyJet	direct
23 Sep - 11 Oct	easyJet	direct
30 Sep - 18 Oct	easyJet	direct
20 Sep - 18 Oct	Ryanair

Also check the deals for one-way flights from Thessaloniki to Basel 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 Basel in September from 158€

Return flights