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

Return flights

05 May - 19 May	Lufthansa
08 May - 16 May	Air China
08 May - 15 May	Air China
23 May - 30 May	Air China
07 May - 24 May	Air China
01 May - 31 May	Air China
01 May - 08 May	Air China
13 May - 27 May	Air China
25 May - 31 May	Air China
08 May - 22 May	Air China
23 May - 03 Jun	Air China
20 May - 10 Jun	Air China
19 May - 02 Jun	Air China
21 May - 08 Jun	Air China
26 May - 05 Jun	Scandinavian Airlines
29 May - 06 Jun	Scandinavian Airlines
21 May - 06 Jun	Scandinavian Airlines
05 May - 06 Jun	Ryanair
26 May - 03 Jun	Air China
05 May - 08 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 $646

Return flights