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

Return flights

09 Mar - 20 Mar	KLM
04 Mar - 13 Mar	KLM
05 Mar - 20 Mar	KLM
05 Mar - 12 Mar	KLM
04 Mar - 19 Mar	KLM
16 Mar - 22 Mar	KLM
11 Mar - 24 Mar	KLM
11 Mar - 22 Mar	KLM
23 Mar - 01 Apr	Lufthansa
02 Mar - 26 Mar	KLM
02 Mar - 13 Mar	KLM
16 Mar - 08 Apr	Lufthansa
23 Mar - 08 Apr	Lufthansa
18 Mar - 08 Apr	Lufthansa
31 Mar - 14 Apr	SWISS
23 Mar - 02 Apr	KLM
19 Mar - 02 Apr	KLM
21 Mar - 07 Apr	SWISS
23 Mar - 22 Apr	Lufthansa
20 Mar - 02 Apr	KLM

Also check the deals for one-way flights from London to Seoul 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 London to Seoul in March from $698

Return flights