AirHint found the following cheapest return flights from Glasgow (GLA) to Kos (KGS) in September 2025 (see full year).

Return flights

16 Sep - 23 Sep	easyJet	direct
09 Sep - 16 Sep	easyJet	direct
23 Sep - 27 Sep	easyJet	direct
20 Sep - 23 Sep	easyJet	direct
10 Sep - 16 Sep	easyJet
30 Sep - 07 Oct	easyJet
09 Sep - 13 Sep	easyJet	direct
18 Sep - 23 Sep	easyJet
09 Sep - 20 Sep	easyJet	direct
15 Sep - 22 Sep	Ryanair
13 Sep - 20 Sep	easyJet	direct
30 Sep - 07 Oct	easyJet	direct
28 Sep - 03 Oct	easyJet
30 Sep - 14 Oct	easyJet	direct

Also check the deals for one-way flights from Glasgow to Kos 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 Glasgow to Kos in September from $198

Return flights