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

Return flights

05 May - 22 May	Ryanair
16 May - 24 May	Wizz Air Malta
17 May - 24 May	Wizz Air Malta
14 May - 04 Jun	Wizz Air Malta
24 May - 08 Jun	Wizz Air
18 May - 31 May	Ryanair
09 May - 17 May	Ryanair
08 May - 15 May	Wizz Air
08 May - 17 May	Wizz Air
20 May - 31 May	Wizz Air Malta
21 May - 05 Jun	Ryanair
16 May - 26 May	Wizz Air Malta
13 May - 28 May	Ryanair
22 May - 06 Jun	Wizz Air Malta
22 May - 27 Jun	Wizz Air Malta
01 May - 30 Jun	Ryanair
20 May - 01 Jun	Wizz Air UK
26 May - 09 Jun	Ryanair
18 May - 01 Jun	Wizz Air UK
18 May - 02 Jun	easyJet

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 588€

Return flights