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

Return flights

19 May - 27 May	KLM
21 May - 07 Jun	KLM
24 May - 17 Jun	KLM
21 May - 28 May	KLM
25 May - 03 Jun	KLM
18 May - 28 May	Lufthansa
01 May - 27 May	KLM
07 May - 23 May	KLM
04 May - 18 May	Lufthansa
04 May - 11 May	KLM
14 May - 19 May	KLM
07 May - 28 May	KLM
17 May - 01 Jun	KLM
07 May - 18 May	KLM
25 May - 01 Jun	KLM
21 May - 11 Jun	KLM
23 May - 06 Jun	KLM
30 May - 19 Jun	KLM
27 May - 08 Jun	KLM
02 May - 11 Jun	KLM

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from London to Seoul in May from 713€

Return flights