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

Return flights

22 Sep - 18 Oct	British Airways
23 Sep - 24 Oct	British Airways
18 Sep - 15 Oct	British Airways
25 Sep - 17 Oct	Hainan Airlines
19 Sep - 17 Oct	Hainan Airlines
28 Sep - 18 Oct	Hainan Airlines
24 Sep - 10 Oct	Norwegian
22 Sep - 10 Oct	Hainan Airlines
25 Sep - 11 Oct	Hainan Airlines
19 Sep - 12 Oct	Hainan Airlines
02 Sep - 16 Sep	Ryanair
15 Sep - 26 Sep	Ryanair
08 Sep - 14 Sep	Ryanair
01 Sep - 14 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
14 Sep - 23 Sep	KLM
09 Sep - 23 Sep	KLM
09 Sep - 16 Sep	China Southern
08 Sep - 18 Sep	Ryanair
09 Sep - 17 Sep	Ryanair

Also check the deals for one-way flights from Manchester 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 Manchester to Seoul in September from 494€

Return flights