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

Return flights

30 Sep - 12 Oct	Wizz Air
30 Sep - 10 Oct	Wizz Air
27 Sep - 07 Oct	Wizz Air UK
30 Sep - 11 Oct	Wizz Air
30 Sep - 24 Oct	Wizz Air
19 Sep - 03 Oct	Wizz Air Malta
02 Sep - 18 Sep	Wizz Air
02 Sep - 17 Sep	Wizz Air
29 Sep - 12 Oct	Ryanair
30 Sep - 27 Oct	Wizz Air
15 Sep - 13 Oct	Ryanair
20 Sep - 28 Sep	Wizz Air UK
28 Sep - 12 Oct	Wizz Air
19 Sep - 28 Sep	Wizz Air
07 Sep - 14 Sep	Wizz Air
07 Sep - 17 Sep	Wizz Air
02 Sep - 29 Sep	Wizz Air
01 Sep - 14 Sep	Ryanair
17 Sep - 29 Sep	Wizz Air
01 Sep - 18 Sep	Ryanair

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 619€

Return flights