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

Return flights

12 May - 26 May	Finnair
04 May - 21 May	Finnair
23 May - 31 May	Vietnam Airlines
06 May - 14 May	Finnair
11 May - 18 May	Finnair
12 May - 19 May	Finnair
21 May - 01 Jun	Finnair
12 May - 20 May	Finnair
12 May - 31 May	Finnair
27 May - 03 Jun	Finnair
11 May - 15 May	Vietnam Airlines
05 May - 24 May	Finnair
10 May - 01 Jun	Finnair
29 May - 03 Jun	Air China
27 May - 03 Jun	Korean Air	direct
21 May - 01 Jun	Korean Air	direct
10 May - 01 Jun	Asiana Airlines	direct
31 May - 07 Jun	Asiana Airlines	direct

Also check the deals for one-way flights from Seoul to London 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 Seoul to London in May from 618€

Return flights