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

Return flights

08 Apr - 22 Apr	Ryanair
08 Apr - 12 May	Ryanair
25 Apr - 30 Apr	Ryanair
15 Apr - 30 Apr	Ryanair
23 Apr - 30 Apr	Ryanair
23 Apr - 04 May	Ryanair
23 Apr - 27 Apr	Ryanair
23 Apr - 15 May	Ryanair
09 Apr - 20 May	Ryanair
13 Apr - 27 Apr	Ryanair
29 Apr - 13 May	Ryanair
08 Apr - 19 Apr	Ryanair
08 Apr - 15 Apr	Ryanair
01 Apr - 10 Apr	Ryanair
03 Apr - 10 Apr	Ryanair
25 Apr - 02 May	Ryanair
22 Apr - 06 May	Ryanair
22 Apr - 05 May	Emirates
19 Apr - 04 May	Emirates
20 Apr - 04 May	Emirates

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 661€

Return flights