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

Return flights

04 Sep - 11 Sep	Ryanair
01 Sep - 11 Sep	Ryanair
08 Sep - 11 Sep	Ryanair
14 Sep - 30 Sep	Ryanair
14 Sep - 27 Sep	Ryanair
02 Sep - 16 Sep	Ryanair
02 Sep - 12 Sep	Ryanair
19 Sep - 02 Oct	Ryanair
30 Sep - 09 Oct	Pegasus Airlines
01 Sep - 17 Sep	Ryanair
07 Sep - 14 Sep	Ryanair
17 Sep - 30 Sep	Ryanair
18 Sep - 02 Oct	Ryanair
30 Sep - 15 Oct	Pegasus Airlines
23 Sep - 02 Oct	Ryanair
29 Sep - 22 Oct	Ryanair
22 Sep - 11 Oct	Turkish Airlines
23 Sep - 11 Oct	Ryanair
11 Sep - 04 Oct	Turkish Airlines
20 Sep - 14 Oct	Turkish Airlines

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 615€

Return flights