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

Return flights

30 Apr - 07 May	KLM
02 Apr - 09 Apr	KLM
02 Apr - 06 Apr	KLM
29 Apr - 13 May	KLM
24 Apr - 13 May	SWISS
02 Apr - 10 Apr	KLM
12 Apr - 18 Apr	KLM
23 Apr - 29 Apr	KLM
05 Apr - 12 Apr	KLM
09 Apr - 16 Apr	KLM
23 Apr - 27 Apr	KLM
02 Apr - 18 Apr	KLM
01 Apr - 12 Apr	KLM
19 Apr - 09 May	KLM
18 Apr - 10 May	KLM
20 Apr - 02 May	KLM
29 Apr - 10 May	KLM
24 Apr - 01 May	KLM
17 Apr - 01 May	KLM

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

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 April from $959

Return flights