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

Return flights

27 Apr - 11 May	Ryanair
27 Apr - 25 May	Ryanair
27 Apr - 05 May	Ryanair
30 Apr - 14 May	Ryanair
08 Apr - 11 May	Ryanair
29 Apr - 08 May	Ryanair
09 Apr - 30 Apr	Ryanair
29 Apr - 11 May	Ryanair
06 Apr - 27 Apr	Ryanair
11 Apr - 04 May	Ryanair
17 Apr - 08 May	Turkish Airlines
24 Apr - 01 May	Turkish Airlines
13 Apr - 29 Apr	Turkish Airlines
16 Apr - 27 Apr	Turkish Airlines
20 Apr - 29 Apr	Turkish Airlines
13 Apr - 30 Apr	Ryanair
16 Apr - 30 Apr	Turkish Airlines
22 Apr - 30 Apr	Turkish Airlines
15 Apr - 22 Apr	Turkish Airlines
14 Apr - 24 Apr	Turkish Airlines

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 569€

Return flights