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

Return flights

02 Apr - 09 Apr	China Southern
29 Apr - 05 May	Air China
28 Apr - 05 May	Air China
15 Apr - 22 Apr	Air China
22 Apr - 26 Apr	Air China
22 Apr - 25 Apr	Air China
29 Apr - 06 May	Air China
25 Apr - 29 Apr	Air China
18 Apr - 26 Apr	Air China
04 Apr - 12 Apr	Air China
24 Apr - 01 May	Air China
24 Apr - 03 May	Air China
25 Apr - 03 May	Air China
06 Apr - 19 Apr	ANA
30 Apr - 07 May	Japan Airlines
30 Apr - 10 May	Japan Airlines
30 Apr - 05 May	Air China
18 Apr - 25 Apr	ANA
23 Apr - 25 Apr	Japan Airlines
23 Apr - 01 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Seoul to London in April from 701€

Return flights