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

Return flights

03 Sep - 31 Oct	China Eastern
20 Sep - 11 Oct	Air China
19 Sep - 10 Oct	Air China
18 Sep - 05 Oct	Air China
27 Sep - 17 Oct	Air China
17 Sep - 03 Oct	Air China
25 Sep - 12 Oct	Air China
25 Sep - 16 Oct	China Eastern
18 Sep - 03 Oct	Air China
12 Sep - 03 Oct	Air China
07 Sep - 14 Sep	Ryanair
07 Sep - 13 Sep	Ryanair
07 Sep - 12 Sep	Ryanair
02 Sep - 16 Sep	Ryanair
02 Sep - 11 Sep	Ryanair
11 Sep - 16 Sep	Air China
21 Sep - 29 Sep	Ryanair
01 Sep - 11 Sep	Ryanair
12 Sep - 29 Sep	China Eastern
01 Sep - 07 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 360€

Return flights