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

Return flights

06 May - 20 May	China Southern
13 May - 26 May	China Southern
09 May - 25 May	China Southern
18 May - 26 May	China Southern
14 May - 08 Jun	Air China
14 May - 28 May	Air China
16 May - 25 May	Air China
18 May - 31 May	Air China
21 May - 31 May	Air China
24 May - 03 Jun	Air China
11 May - 29 May	Air China
23 May - 02 Jun	Air China
25 May - 29 May	Air China
29 May - 03 Jun	Air China
24 May - 04 Jun	Air China
05 May - 02 Jun	Japan Airlines
27 May - 06 Jun	ANA

Also check the deals for one-way flights from Seoul to London in May.

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 May from 495€

Return flights