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

Return flights

13 Apr - 20 Apr	Air China
01 Apr - 11 Apr	China Southern
01 Apr - 07 Apr	China Southern
01 Apr - 08 Apr	China Southern
01 Apr - 15 Apr	China Southern
13 Apr - 01 May	Air China
13 Apr - 18 Apr	Air China
03 Apr - 08 Apr	Air China
27 Apr - 13 May	Air China
27 Apr - 19 May	Air China
13 Apr - 23 Apr	Air China
15 Apr - 12 May	Air China
03 Apr - 14 Apr	Air China
03 Apr - 15 Apr	Air China
25 Apr - 05 May	Etihad Airways
28 Apr - 05 May	Air China
25 Apr - 03 May	Etihad Airways
25 Apr - 02 May	Etihad Airways
30 Apr - 05 May	Etihad Airways
28 Apr - 04 May	Air China

Also check the deals for one-way flights from Seoul to London in April.

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 Seoul to London in April from 469€

Return flights