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

Return flights

31 Aug - 11 Sep	Shenzhen Airlines
31 Aug - 13 Sep	Shenzhen Airlines
29 Aug - 12 Sep	Shenzhen Airlines
23 Aug - 06 Sep	Lufthansa
31 Aug - 07 Sep	Lufthansa
18 Aug - 04 Sep	Finnair
28 Aug - 05 Sep	Lufthansa
17 Aug - 25 Aug	Finnair
06 Aug - 20 Aug	Scandinavian Airlines
12 Aug - 26 Aug	Finnair
04 Aug - 25 Aug	Finnair
28 Aug - 04 Sep	Finnair
04 Aug - 11 Aug	Scandinavian Airlines
04 Aug - 13 Aug	Scandinavian Airlines
24 Aug - 06 Sep	Finnair
21 Aug - 28 Aug	Finnair
03 Aug - 04 Sep	Finnair
08 Aug - 18 Aug	Finnair
08 Aug - 21 Aug	Scandinavian Airlines
12 Aug - 21 Aug	Finnair

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 532€

Return flights