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

Return flights

03 Apr - 05 Apr	Air China
17 Apr - 26 Apr	Air China
12 Apr - 19 Apr	Air China
12 Apr - 26 Apr	Air China
21 Apr - 19 May	Air China
22 Apr - 26 Apr	Air China
14 Apr - 21 Apr	Air China
26 Apr - 29 Apr	ANA
01 Apr - 08 Apr	ANA
13 Apr - 27 Apr	ANA
06 Apr - 20 Apr	ANA
07 Apr - 13 May	ANA
27 Apr - 07 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 $882

Return flights