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

Return flights

02 May - 10 May	China Eastern
28 May - 12 Jun	Air China
28 May - 13 Jun	Air China
13 May - 18 May	Air China
26 May - 05 Jun	Air China
01 May - 15 May	Air China
01 May - 18 May	Air China
01 May - 07 May	Air China
01 May - 17 May	Air China
03 May - 16 May	China Eastern
02 May - 07 May	China Eastern
01 May - 10 May	China Eastern
02 May - 16 May	China Eastern
13 May - 06 Jun	Air China
27 May - 10 Jun	Air China
15 May - 01 Jun	Air China
12 May - 03 Jun	Air China
30 May - 20 Jun	Air China
29 May - 01 Jun	Air China
18 May - 05 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 365€

Return flights