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

Return flights

18 May - 22 May	Ryanair
04 May - 15 May	Ryanair
26 May - 02 Jun	Ryanair
18 May - 23 May	Ryanair
05 May - 13 May	Ryanair
15 May - 22 May	Ryanair
06 May - 13 May	Ryanair
16 May - 03 Jun	Ryanair
07 May - 22 May	Ryanair
07 May - 20 May	Ryanair
05 May - 07 Jun	Ryanair
11 May - 19 May	Ryanair
06 May - 21 May	Ryanair
31 May - 07 Jun	Ryanair
15 May - 05 Jun	Ryanair
30 May - 08 Jun	Ryanair
29 May - 18 Jun	Ryanair
26 May - 11 Jun	Turkish Airlines
30 May - 14 Jun	Ryanair
27 May - 10 Jun	Turkish Airlines

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

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 May from 586€

Return flights