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

Return flights

25 Sep - 10 Oct	Air China
11 Sep - 19 Sep	Air China
23 Sep - 04 Oct	China Eastern
18 Sep - 03 Oct	Air China
24 Sep - 11 Oct	China Southern
21 Sep - 05 Oct	China Southern
24 Sep - 04 Oct	China Southern
25 Sep - 04 Oct	China Southern
11 Sep - 03 Oct	Air China
21 Sep - 11 Oct	China Southern
30 Sep - 12 Oct	Wizz Air UK
20 Sep - 30 Sep	Wizz Air UK
13 Sep - 19 Sep	Air China
08 Sep - 16 Sep	Air China
11 Sep - 23 Sep	Air China
04 Sep - 19 Sep	Air China
06 Sep - 21 Sep	Air China
08 Sep - 23 Sep	Air China
16 Sep - 29 Sep	Wizz Air
02 Sep - 06 Sep	China Eastern

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 512€

Return flights