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

Return flights

09 Sep - 14 Oct	China Southern
19 Sep - 18 Oct	China Southern
03 Sep - 16 Sep	easyJet
19 Sep - 08 Oct	easyJet
04 Sep - 16 Sep	easyJet
24 Sep - 14 Oct	British Airways
01 Sep - 15 Sep	easyJet
25 Sep - 14 Oct	easyJet
02 Sep - 18 Sep	easyJet
09 Sep - 24 Sep	easyJet
08 Sep - 24 Sep	easyJet
04 Sep - 24 Sep	easyJet
10 Sep - 26 Sep	easyJet
09 Sep - 25 Sep	easyJet
08 Sep - 25 Sep	easyJet
16 Sep - 01 Oct	easyJet
15 Sep - 01 Oct	easyJet

Also check the deals for one-way flights from Glasgow to Seoul 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 Seoul in September from $762

Return flights