AirHint found the following cheapest return flights from London (STN) to Seoul (ICN) in September 2026 (see full year).

Return flights

01 Sep - 15 Sep	Ryanair
18 Sep - 28 Sep	Turkish Airlines
20 Sep - 28 Sep	Turkish Airlines
18 Sep - 25 Sep	Turkish Airlines
11 Sep - 25 Sep	Turkish Airlines
18 Sep - 27 Sep	Turkish Airlines
20 Sep - 25 Sep	Turkish Airlines
02 Sep - 14 Sep	Ryanair
20 Sep - 27 Sep	Turkish Airlines
12 Sep - 26 Sep	Turkish Airlines
21 Sep - 05 Oct	Emirates
29 Sep - 06 Oct	Emirates
25 Sep - 04 Oct	Emirates
01 Sep - 01 Oct	Emirates
25 Sep - 01 Oct	Emirates
20 Sep - 02 Oct	Emirates
21 Sep - 03 Oct	Emirates
22 Sep - 03 Oct	Emirates
20 Sep - 03 Oct	Emirates
24 Sep - 02 Oct	Emirates

Also check the deals for one-way flights from London 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 London to Seoul in September from $895

Return flights