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

Return flights

28 Aug - 17 Sep	easyJet
27 Aug - 03 Sep	Wizz Air
27 Aug - 11 Sep	Wizz Air
29 Aug - 02 Sep	Wizz Air UK
31 Aug - 04 Sep	Wizz Air
30 Aug - 17 Sep	Wizz Air
29 Aug - 07 Sep	Wizz Air UK
31 Aug - 05 Sep	Wizz Air
25 Aug - 08 Sep	Wizz Air
29 Aug - 14 Sep	easyJet
25 Aug - 31 Aug	Wizz Air UK
25 Aug - 29 Aug	Wizz Air
24 Aug - 29 Aug	Wizz Air
24 Aug - 30 Aug	Wizz Air
19 Aug - 29 Aug	easyJet
19 Aug - 22 Aug	Ryanair
22 Aug - 31 Aug	Wizz Air UK
29 Aug - 31 Aug	Wizz Air UK
24 Aug - 31 Aug	Wizz Air
11 Aug - 18 Aug	easyJet

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 514€

Return flights