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

Return flights

28 Mar - 16 Apr	Air China
30 Mar - 06 Apr	Air China
29 Mar - 01 Apr	Air China
16 Mar - 04 Apr	Korean Air
12 Mar - 17 Mar	China Eastern
07 Mar - 14 Mar	China Eastern
23 Mar - 27 Mar	Air China
04 Mar - 29 Mar	China Eastern
24 Mar - 07 Apr	China Eastern
30 Mar - 02 Apr	Air China
31 Mar - 02 Apr	Air China
23 Mar - 29 Mar	China Eastern
18 Mar - 21 Mar	Asiana Airlines

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

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 March from 444€

Return flights