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

Return flights

26 May - 04 Jun	Air China
14 May - 24 May	Air China
22 May - 27 May	China Southern
18 May - 22 May	China Southern
22 May - 05 Jun	China Southern
17 May - 31 May	China Southern
20 May - 27 May	Air China
16 May - 22 May	Air China
07 May - 17 Jun	Air China
26 May - 29 May	Air China
01 May - 08 May	Air China
14 May - 20 May	Air China
01 May - 31 May	Air China
27 May - 04 Jun	ANA
04 May - 17 Jun	Japan Airlines

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 550€

Return flights