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

Return flights

01 Apr - 14 Apr	Philippine Airlines
27 Apr - 27 May	Philippine Airlines
25 Apr - 08 May	Air China
28 Apr - 05 May	Emirates
29 Apr - 05 May	Emirates
28 Apr - 04 May	Emirates
29 Apr - 04 May	Emirates
09 Apr - 18 Apr	Air China
09 Apr - 16 Apr	Air China
04 Apr - 11 Apr	Air China
15 Apr - 19 Apr	Air China
02 Apr - 11 Apr	Air China
02 Apr - 09 Apr	Air China
25 Apr - 02 May	Air China
30 Apr - 05 May	Air China
12 Apr - 20 Apr	Air China
17 Apr - 21 Apr	Air China
12 Apr - 19 Apr	Air China
21 Apr - 01 May	Emirates
30 Apr - 16 May	Emirates

Also check the deals for one-way flights from Seoul to London 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 Seoul to London in April from 670€

Return flights