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

Return flights

15 May - 10 Jun	China Eastern
11 May - 10 Jun	China Eastern
14 May - 27 May	China Eastern
14 May - 25 May	Air China
21 May - 23 Jun	KLM
16 May - 08 Jun	Air China
01 May - 16 May	China Eastern
14 May - 20 May	Air China
30 May - 15 Jun	Air China
26 May - 05 Jun	Air China
28 May - 12 Jun	Air China
28 May - 10 Jun	Air China
26 May - 24 Jun	Air China
14 May - 22 May	China Eastern
21 May - 27 May	Air China
02 May - 15 May	Air China
12 May - 27 May	Air China
12 May - 18 May	Air China
02 May - 11 May	Air China
12 May - 10 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from London to Seoul in May from 485€

Return flights