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

Return flights

19 Sep - 25 Oct	China Eastern
22 Sep - 13 Oct	China Eastern
25 Sep - 07 Oct	Air China
21 Sep - 04 Oct	China Southern
07 Sep - 22 Oct	China Southern
24 Sep - 12 Oct	China Southern
18 Sep - 04 Oct	China Southern
25 Sep - 11 Oct	China Southern
07 Sep - 13 Sep	China Eastern
18 Sep - 03 Oct	Air China
29 Sep - 13 Oct	China Eastern
16 Sep - 29 Sep	Wizz Air
19 Sep - 29 Sep	Norwegian Air Sweden AOC
02 Sep - 13 Sep	Wizz Air
01 Sep - 15 Sep	Ryanair
14 Sep - 27 Sep	Norwegian Air Sweden AOC
01 Sep - 12 Sep	Ryanair
02 Sep - 16 Sep	Wizz Air
09 Sep - 16 Sep	Wizz Air
01 Sep - 13 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 532€

Return flights