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

Return flights

14 Apr - 21 Apr	Lufthansa
13 Apr - 21 Apr	Lufthansa
29 Apr - 20 May	Lufthansa
07 Apr - 21 Apr	Lufthansa
28 Apr - 12 May	Lufthansa
29 Apr - 13 May	Lufthansa
08 Apr - 23 Apr	Lufthansa
12 Apr - 22 Apr	SWISS
29 Apr - 06 May	Lufthansa
07 Apr - 23 Apr	Lufthansa
09 Apr - 23 Apr	Lufthansa
21 Apr - 06 May	Lufthansa
21 Apr - 30 Apr	Lufthansa
21 Apr - 29 Apr	Lufthansa
12 Apr - 23 Apr	SWISS
21 Apr - 04 May	Lufthansa
22 Apr - 06 May	Air China
25 Apr - 05 May	Air China
20 Apr - 01 May	Air China
21 Apr - 01 May	Air China

Also check the deals for one-way flights from London to Seoul 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 London to Seoul in April from 482€

Return flights