AirHint found the following cheapest return flights from London (LTN) to Seoul (ICN) in August 2025 (see full year).

Return flights

25 Aug - 07 Sep	Wizz Air UK
23 Aug - 05 Sep	Wizz Air
25 Aug - 04 Sep	Wizz Air
24 Aug - 09 Sep	Wizz Air
23 Aug - 03 Sep	Wizz Air
11 Aug - 17 Aug	Wizz Air UK
23 Aug - 09 Sep	Wizz Air
23 Aug - 02 Sep	Wizz Air
04 Aug - 21 Aug	Wizz Air UK
20 Aug - 31 Aug	Wizz Air UK
31 Aug - 11 Sep	easyJet
28 Aug - 11 Sep	easyJet
29 Aug - 12 Sep	easyJet
08 Aug - 10 Aug	Wizz Air UK
13 Aug - 21 Aug	Wizz Air UK
13 Aug - 19 Aug	Wizz Air UK
01 Aug - 03 Aug	Wizz Air UK
11 Aug - 21 Aug	Wizz Air UK
13 Aug - 28 Aug	Wizz Air UK
06 Aug - 19 Aug	Wizz Air UK

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 620€

Return flights