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

Return flights

11 Sep - 25 Sep	Ryanair
10 Sep - 25 Sep	Ryanair
07 Sep - 20 Sep	Ryanair
19 Sep - 30 Sep	Ryanair
14 Sep - 28 Sep	Ryanair
16 Sep - 25 Sep	Ryanair
11 Sep - 18 Sep	Ryanair
08 Sep - 20 Sep	Ryanair
07 Sep - 18 Sep	Ryanair
21 Sep - 27 Sep	Ryanair
25 Sep - 02 Oct	Ryanair
21 Sep - 05 Oct	Emirates
29 Sep - 06 Oct	Emirates
20 Sep - 05 Oct	Emirates
27 Sep - 04 Oct	Emirates
25 Sep - 04 Oct	Emirates
18 Sep - 02 Oct	Emirates
01 Sep - 03 Oct	Emirates
20 Sep - 03 Oct	Emirates
17 Sep - 07 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 662€

Return flights