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

Return flights

06 Dec - 14 Dec	Ryanair
02 Dec - 10 Dec	Ryanair
02 Dec - 12 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
01 Dec - 21 Dec	Ryanair
10 Dec - 18 Dec	Ryanair
08 Dec - 15 Dec	Ryanair
05 Dec - 11 Dec	Ryanair
12 Dec - 17 Jan	Ryanair
05 Dec - 21 Dec	Ryanair
28 Dec - 11 Jan	Ryanair
06 Dec - 28 Dec	Ryanair
12 Dec - 10 Jan	Ryanair
13 Dec - 17 Jan	Ryanair
06 Dec - 04 Jan	Ryanair
12 Dec - 11 Jan	Ryanair
14 Dec - 17 Jan	Ryanair
08 Dec - 17 Jan	Ryanair
14 Dec - 10 Jan	Ryanair
09 Dec - 11 Jan	Ryanair

Also check the deals for one-way flights from London to Seoul in December.

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 December from $587

Return flights