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

Return flights

20 May - 03 Jun	Lufthansa
27 May - 10 Jun	Lufthansa
07 May - 13 May	Lufthansa
27 May - 09 Jun	Lufthansa
27 May - 04 Jun	Lufthansa
13 May - 27 May	Lufthansa
13 May - 20 May	Lufthansa
11 May - 20 May	Lufthansa
26 May - 25 Jun	KLM
19 May - 27 May	KLM
12 May - 20 May	SWISS
13 May - 19 May	Lufthansa
06 May - 12 May	Air Dolomiti
26 May - 09 Jun	SWISS
05 May - 19 May	KLM
21 May - 26 May	KLM
25 May - 10 Jun	Air Dolomiti
12 May - 17 Jun	SWISS
28 May - 14 Jun	Lufthansa
27 May - 07 Jun	Air Dolomiti

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 627€

Return flights