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

Return flights

23 Mar - 31 Mar	Lufthansa
24 Mar - 19 Apr	Air France
31 Mar - 07 Apr	KLM
26 Mar - 08 Apr	Finnair
13 Mar - 20 Mar	KLM
03 Mar - 10 Mar	KLM
03 Mar - 11 Mar	KLM
16 Mar - 22 Mar	Finnair
04 Mar - 30 Mar	Finnair
27 Mar - 09 Apr	Finnair
11 Mar - 15 Mar	Finnair
04 Mar - 15 Mar	Finnair
04 Mar - 18 Mar	Finnair
16 Mar - 24 Mar	Finnair
27 Mar - 04 Apr	Finnair
16 Mar - 12 Apr	Air China
18 Mar - 04 Apr	Air China
24 Mar - 19 Apr	Asiana Airlines	direct
28 Mar - 04 Apr	Air China
25 Mar - 03 Apr	Air China

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 572€

Return flights