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

Return flights

01 May - 31 May	China Eastern
03 May - 17 May	China Eastern
18 May - 02 Jun	Lufthansa
19 May - 02 Jun	Lufthansa
11 May - 22 May	Air China
06 May - 20 May	Air China
08 May - 22 May	Air China
18 May - 24 May	Air China
19 May - 25 May	Air China
11 May - 21 May	Air China
03 May - 11 May	Air China
13 May - 25 May	Air China
17 May - 03 Jun	Air China
31 May - 10 Jun	Air China
20 May - 06 Jun	Air China
25 May - 07 Jun	Air China
25 May - 08 Jun	Air China
31 May - 14 Jun	Air China
02 May - 07 Jun	Air China
23 May - 06 Jun	Air China

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 460€

Return flights