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

Return flights

01 Apr - 10 Apr	Air China
08 Apr - 19 Apr	Air China
23 Apr - 26 Apr	Air China
01 Apr - 08 Apr	Air China
08 Apr - 15 Apr	Air China
11 Apr - 18 Apr	Korean Air
10 Apr - 15 Apr	Air China
15 Apr - 22 Apr	Air China
15 Apr - 19 Apr	Air China
16 Apr - 19 Apr	Air China
30 Apr - 08 May	Air China
26 Apr - 06 May	Air China
30 Apr - 11 May	Japan Airlines
29 Apr - 07 May	Japan Airlines
26 Apr - 11 May	ANA
26 Apr - 09 May	Japan Airlines
29 Apr - 09 May	Japan Airlines
30 Apr - 09 May	Japan Airlines
28 Apr - 05 May	Japan Airlines
15 Apr - 02 May	Japan Airlines

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 553€

Return flights