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

Return flights

20 Apr - 11 May	Ryanair
20 Apr - 29 Apr	Ryanair
22 Apr - 02 May	Ryanair
20 Apr - 30 Apr	Ryanair
30 Apr - 23 May	Ryanair
24 Apr - 08 May	Ryanair
20 Apr - 01 May	Ryanair
27 Apr - 08 May	Ryanair
26 Apr - 08 May	Ryanair
18 Apr - 09 May	Ryanair
30 Apr - 11 May	Ryanair
25 Apr - 08 May	Ryanair
20 Apr - 26 Apr	Ryanair
16 Apr - 29 Apr	Ryanair
19 Apr - 30 Apr	Ryanair
14 Apr - 30 Apr	Ryanair
14 Apr - 20 Apr	Ryanair
15 Apr - 22 Apr	Ryanair
16 Apr - 23 Apr	Ryanair
13 Apr - 24 Apr	Ryanair

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 612€

Return flights