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

Return flights

19 Sep - 27 Sep	Etihad Airways
04 Sep - 15 Sep	Etihad Airways
04 Sep - 13 Sep	Etihad Airways
15 Sep - 29 Sep	Lufthansa
16 Sep - 29 Sep	Lufthansa
01 Sep - 15 Sep	Etihad Airways
21 Sep - 06 Oct	Air India
21 Sep - 07 Oct	Air India
21 Sep - 11 Oct	Air India
21 Sep - 13 Oct	Air India
21 Sep - 14 Oct	Air India
22 Sep - 14 Oct	Air India
23 Sep - 14 Oct	Air India
08 Sep - 13 Oct	Air India
22 Sep - 04 Oct	Air India
22 Sep - 06 Oct	Air India
16 Sep - 30 Sep	Lufthansa
10 Sep - 23 Sep	Lufthansa
11 Sep - 15 Sep	Etihad Airways
10 Sep - 18 Sep	Lufthansa

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 509€

Return flights