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

Return flights

24 Aug - 15 Sep	Lufthansa
24 Aug - 09 Sep	Lufthansa
31 Aug - 09 Sep	Lufthansa
27 Aug - 03 Sep	Lufthansa
31 Aug - 14 Sep	Lufthansa
24 Aug - 14 Sep	Lufthansa
27 Aug - 12 Sep	Etihad Airways
29 Aug - 07 Sep	Lufthansa
27 Aug - 11 Sep	Lufthansa
31 Aug - 30 Sep	Lufthansa
20 Aug - 28 Aug	Etihad Airways
19 Aug - 26 Aug	Lufthansa
04 Aug - 14 Aug	Lufthansa
07 Aug - 14 Aug	Lufthansa
04 Aug - 13 Aug	Lufthansa
04 Aug - 15 Aug	Lufthansa
04 Aug - 12 Aug	Lufthansa
14 Aug - 23 Aug	Lufthansa
09 Aug - 16 Aug	Lufthansa
11 Aug - 23 Aug	Lufthansa

Also check the deals for one-way flights from London to Seoul in August.

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 August from 498€

Return flights