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

Return flights

12 May - 20 May	Ryanair
12 May - 22 May	Ryanair
11 May - 25 May	Pegasus Airlines
04 May - 12 May	Ryanair
26 May - 03 Jun	Ryanair
20 May - 28 May	Ryanair
21 May - 01 Jun	Ryanair
12 May - 19 May	Ryanair
10 May - 18 May	Pegasus Airlines
14 May - 22 May	Ryanair
06 May - 16 May	Ryanair
06 May - 14 May	Ryanair
28 May - 04 Jun	Turkish Airlines
25 May - 09 Jun	Ryanair
24 May - 01 Jun	Ryanair
28 May - 13 Jun	Turkish Airlines
17 May - 01 Jun	Ryanair
27 May - 10 Jun	Ryanair
17 May - 08 Jun	Ryanair
18 May - 04 Jun	Ryanair

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 $667

Return flights