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

Return flights

14 Apr - 08 May	China Eastern
28 Apr - 06 May	China Eastern
23 Apr - 08 May	Air China
28 Apr - 15 May	Air China
26 Apr - 08 May	Air China
27 Apr - 07 May	Air China
28 Apr - 07 May	Air China
23 Apr - 07 May	Air China
28 Apr - 18 May	Air China
13 Apr - 17 May	Air China
16 Apr - 27 Apr	China Eastern
14 Apr - 22 Apr	China Eastern
16 Apr - 22 Apr	China Eastern
07 Apr - 22 Apr	China Eastern
17 Apr - 27 Apr	Air China
14 Apr - 27 Apr	Air China
09 Apr - 27 Apr	Air China
23 Apr - 27 Apr	Air China
21 Apr - 27 Apr	Air China
13 Apr - 27 Apr	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 374€

Return flights