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

Return flights

21 Apr - 26 Apr	Ryanair
07 Apr - 26 Apr	Ryanair
09 Apr - 26 Apr	Ryanair
16 Apr - 26 Apr	Ryanair
17 Apr - 26 Apr	Ryanair
25 Apr - 09 May	Ryanair
28 Apr - 11 May	Ryanair
07 Apr - 10 May	Ryanair
08 Apr - 19 May	Ryanair
07 Apr - 13 Apr	Ryanair
08 Apr - 13 Apr	Ryanair
08 Apr - 27 Apr	Ryanair
19 Apr - 27 Apr	Ryanair
22 Apr - 08 May	Ryanair
16 Apr - 27 Apr	Ryanair
13 Apr - 11 May	Ryanair
06 Apr - 10 May	Ryanair
22 Apr - 09 May	Ryanair
12 Apr - 12 May	Ryanair
17 Apr - 16 May	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 502€

Return flights