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

Return flights

10 Sep - 16 Sep	Air China
07 Sep - 16 Sep	Air China
09 Sep - 16 Sep	Air China
09 Sep - 14 Sep	Air China
04 Sep - 13 Sep	Air China
15 Sep - 22 Sep	Emirates
17 Sep - 30 Sep	Emirates
01 Sep - 15 Sep	Air China
12 Sep - 20 Sep	Air China
08 Sep - 23 Sep	Air China
01 Sep - 01 Oct	Emirates
18 Sep - 04 Oct	Singapore Airlines
20 Sep - 04 Oct	Singapore Airlines
24 Sep - 03 Oct	Singapore Airlines
26 Sep - 01 Oct	Singapore Airlines
25 Sep - 02 Oct	Singapore Airlines
26 Sep - 10 Oct	Air China
23 Sep - 05 Oct	Air China
25 Sep - 01 Oct	China Southern
28 Sep - 12 Oct	China Southern

Also check the deals for one-way flights from Seoul to London 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 Seoul to London in September from $789

Return flights