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

Return flights

03 Sep - 15 Sep	Lufthansa
01 Sep - 15 Sep	Lufthansa
01 Sep - 08 Sep	Lufthansa
01 Sep - 09 Sep	Lufthansa
03 Sep - 17 Sep	Lufthansa
17 Sep - 08 Oct	Lufthansa
03 Sep - 14 Sep	Lufthansa
12 Sep - 16 Sep	Air China
08 Sep - 23 Sep	Air China
07 Sep - 14 Sep	Air China
08 Sep - 14 Sep	Air China
11 Sep - 11 Oct	Air China
18 Sep - 09 Oct	Air China
21 Sep - 11 Oct	Air China
19 Sep - 04 Oct	China Eastern
19 Sep - 03 Oct	China Eastern
29 Sep - 11 Oct	China Eastern
29 Sep - 14 Oct	Air China
18 Sep - 05 Oct	Air China
27 Sep - 16 Oct	Air China

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 460€

Return flights