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

Return flights

01 Apr - 07 Apr	China Southern
03 Apr - 13 Apr	China Southern
02 Apr - 18 Apr	China Southern
01 Apr - 14 Apr	China Southern
01 Apr - 08 Apr	China Southern
01 Apr - 06 Apr	Air China
08 Apr - 15 Apr	Air China
06 Apr - 19 Apr	Air China
13 Apr - 20 Apr	Lufthansa
22 Apr - 06 May	Lufthansa
15 Apr - 20 Apr	Lufthansa
26 Apr - 05 May	Shenzhen Airlines
28 Apr - 05 May	Air China
27 Apr - 09 May	Air China
22 Apr - 04 May	Lufthansa
29 Apr - 12 May	Lufthansa
30 Apr - 05 May	Lufthansa
28 Apr - 04 May	Air China
29 Apr - 05 May	Lufthansa
30 Apr - 10 May	Lufthansa

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Seoul to London in April from $555

Return flights