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

Return flights

26 Apr - 11 May	Air China
09 Apr - 11 May	Air China
26 Apr - 07 May	Air China
27 Apr - 07 May	Air China
25 Apr - 07 May	Air China
25 Apr - 11 May	Air China
18 Apr - 11 May	Air China
21 Apr - 08 May	Air China
14 Apr - 12 May	Air China
15 Apr - 17 May	Air China
14 Apr - 23 Apr	Lufthansa
20 Apr - 27 Apr	Air China
17 Apr - 26 Apr	China Eastern
09 Apr - 22 Apr	Lufthansa
09 Apr - 16 Apr	Lufthansa
14 Apr - 28 Apr	Lufthansa
14 Apr - 21 Apr	Lufthansa
21 Apr - 28 Apr	Lufthansa
21 Apr - 29 Apr	Lufthansa
09 Apr - 23 Apr	Lufthansa

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 426€

Return flights