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

Return flights

03 May - 11 May	China Eastern
01 May - 09 May	China Eastern
07 May - 22 May	China Eastern
17 May - 27 May	Air China
13 May - 27 May	Air China
05 May - 13 May	Air China
11 May - 19 May	Air China
17 May - 25 May	Air China
25 May - 02 Jun	Air China
31 May - 08 Jun	Air China
05 May - 12 May	Air China
11 May - 18 May	Air China
29 May - 05 Jun	Air China
29 May - 08 Jun	Air China
29 May - 06 Jun	Air China
21 May - 08 Jun	China Southern
25 May - 12 Jun	China Southern
28 May - 12 Jun	China Southern
28 May - 08 Jun	China Southern
28 May - 11 Jun	China Southern

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 $451

Return flights