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

Return flights

06 Apr - 10 Apr	Air China
21 Apr - 27 Apr	Air China
11 Apr - 19 Apr	Air China
22 Apr - 25 Apr	Air China
18 Apr - 26 Apr	Air China
30 Apr - 06 May	Air China
26 Apr - 03 May	Air China
25 Apr - 05 May	Air China
27 Apr - 03 May	Air China
30 Apr - 05 May	Air China
30 Apr - 07 May	Japan Airlines
18 Apr - 25 Apr	ANA
25 Apr - 02 May	ANA
23 Apr - 25 Apr	Japan Airlines
16 Apr - 23 Apr	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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Seoul to London in April from $893

Return flights