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

Return flights

29 Aug - 13 Sep	Ryanair
27 Aug - 30 Sep	Ryanair
20 Aug - 31 Aug	Ryanair
22 Aug - 26 Aug	Norwegian Air Sweden AOC
11 Aug - 18 Aug	Ryanair
16 Aug - 31 Aug	Wizz Air UK
24 Aug - 08 Sep	Ryanair
16 Aug - 02 Sep	Wizz Air UK
25 Aug - 02 Sep	Ryanair
11 Aug - 27 Aug	Ryanair
31 Aug - 09 Sep	Ryanair
17 Aug - 05 Sep	Norwegian Air Sweden AOC
22 Aug - 31 Aug	Wizz Air UK
29 Aug - 06 Sep	Ryanair
26 Aug - 05 Sep	Norwegian Air Sweden AOC
24 Aug - 01 Sep	Norwegian Air Sweden AOC
18 Aug - 27 Aug	Ryanair
20 Aug - 27 Aug	Ryanair
09 Aug - 31 Aug	Wizz Air UK
10 Aug - 27 Aug	Ryanair

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 668€

Return flights