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

Return flights

15 Apr - 10 May	Air China
09 Apr - 08 May	Air China
27 Apr - 08 May	Air China
20 Apr - 28 Apr	Air China
22 Apr - 30 Apr	Air China
21 Apr - 28 Apr	Air China
14 Apr - 28 Apr	Air China
20 Apr - 30 Apr	Air China
15 Apr - 28 Apr	Air China
08 Apr - 27 Apr	Air China
10 Apr - 28 Apr	Air China
09 Apr - 30 Apr	Air China
25 Apr - 07 May	Air China
23 Apr - 16 May	Air China
08 Apr - 29 Apr	Air China
25 Apr - 25 May	Wizz Air UK
30 Apr - 08 May	China Eastern
30 Apr - 11 May	China Eastern
28 Apr - 06 May	Air China
20 Apr - 11 May	easyJet

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 $542

Return flights