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

Return flights

12 May - 19 May	Lufthansa
11 May - 19 May	Lufthansa
05 May - 20 May	Lufthansa
05 May - 26 May	Lufthansa
05 May - 12 May	Lufthansa
12 May - 26 May	Lufthansa
06 May - 21 May	Lufthansa
27 May - 03 Jun	Lufthansa
04 May - 06 May	Lufthansa
04 May - 11 May	Lufthansa
11 May - 16 May	Air China
19 May - 06 Jun	Air China
18 May - 01 Jun	Air China
28 May - 11 Jun	Air China
21 May - 01 Jun	Air China
25 May - 04 Jun	Air China
27 May - 10 Jun	Air China
21 May - 07 Jun	Air China
25 May - 08 Jun	Air China
30 May - 13 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 455€

Return flights