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

Return flights

26 May - 08 Jun	KLM
25 May - 08 Jun	KLM
04 May - 12 May	KLM
27 May - 08 Jun	KLM
12 May - 20 May	SWISS
05 May - 20 May	SWISS
05 May - 12 May	KLM
26 May - 04 Jun	KLM
05 May - 13 May	SWISS
15 May - 03 Jun	SWISS
25 May - 01 Jun	KLM
01 May - 10 May	ITA Airways
04 May - 18 May	KLM
25 May - 07 Jun	KLM
12 May - 25 May	SWISS
11 May - 18 May	KLM
11 May - 02 Jun	KLM
01 May - 18 May	SWISS
18 May - 08 Jun	KLM
11 May - 01 Jun	KLM

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

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 May from $872

Return flights