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

Return flights

14 May - 28 May	Ryanair
30 May - 13 Jun	Ryanair
07 May - 15 May	Ryanair
14 May - 21 May	Ryanair
11 May - 15 May	Ryanair
12 May - 20 May	Ryanair
09 May - 22 May	Ryanair
06 May - 21 May	Ryanair
17 May - 24 May	Ryanair
05 May - 12 May	Ryanair
16 May - 24 May	Ryanair
17 May - 03 Jun	Turkish Airlines
27 May - 04 Jun	Turkish Airlines
27 May - 07 Jun	Turkish Airlines
18 May - 01 Jun	Ryanair
25 May - 06 Jun	Turkish Airlines
30 May - 14 Jun	Turkish Airlines
30 May - 16 Jun	Turkish Airlines
18 May - 03 Jun	Turkish Airlines
25 May - 08 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 620€

Return flights