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

Return flights

01 May - 19 May	China Eastern
01 May - 17 May	China Eastern
03 May - 23 May	China Eastern
05 May - 14 May	Air China
05 May - 15 May	Air China
06 May - 14 May	Air China
04 May - 15 May	Air China
04 May - 13 May	Air China
13 May - 17 May	Air China
04 May - 16 May	Air China
27 May - 03 Jun	Air China
12 May - 03 Jun	Air China
27 May - 10 Jun	Air China
26 May - 05 Jun	Air China
26 May - 09 Jun	Air China
18 May - 02 Jun	Air China
25 May - 15 Jun	Air China
13 May - 06 Jun	Air China
28 May - 14 Jun	Air China
19 May - 04 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 358€

Return flights