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

Return flights

11 Apr - 21 Apr	China Eastern
14 Apr - 21 Apr	China Eastern
07 Apr - 19 May	China Eastern
15 Apr - 10 May	China Eastern
07 Apr - 20 Apr	China Eastern
23 Apr - 11 May	Air China
23 Apr - 08 May	Air China
23 Apr - 07 May	Air China
14 Apr - 06 May	Air China
22 Apr - 20 May	Air China
20 Apr - 06 May	Air China
22 Apr - 06 May	Air China
25 Apr - 16 May	Air China
13 Apr - 27 Apr	Air China
07 Apr - 24 Apr	China Eastern
10 Apr - 26 Apr	China Eastern
13 Apr - 23 Apr	China Eastern
13 Apr - 26 Apr	Air India
02 Apr - 05 Apr	Air India
21 Apr - 28 Apr	Air India

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 418€

Return flights