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

Return flights

30 Aug - 17 Sep	Ryanair
30 Aug - 16 Sep	Ryanair
19 Aug - 31 Aug	Ryanair
25 Aug - 08 Sep	Ryanair
20 Aug - 31 Aug	Pegasus Airlines
21 Aug - 31 Aug	Pegasus Airlines
26 Aug - 31 Aug	Ryanair
09 Aug - 31 Aug	Ryanair
13 Aug - 29 Aug	Ryanair
10 Aug - 02 Sep	Ryanair
28 Aug - 06 Sep	Ryanair
12 Aug - 15 Aug	Ryanair
05 Aug - 31 Aug	Ryanair
03 Aug - 10 Aug	Ryanair
10 Aug - 29 Aug	Ryanair
29 Aug - 13 Sep	Ryanair
21 Aug - 05 Sep	Pegasus Airlines
09 Aug - 01 Sep	Ryanair
11 Aug - 01 Sep	Ryanair
19 Aug - 02 Sep	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 686€

Return flights