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

Return flights

10 Mar - 18 Mar	China Eastern
08 Mar - 16 Mar	China Eastern
01 Mar - 13 Mar	China Eastern
09 Mar - 17 Mar	China Eastern
01 Mar - 12 Mar	China Eastern
04 Mar - 21 Mar	China Eastern
04 Mar - 22 Mar	China Eastern
01 Mar - 16 Mar	China Eastern
08 Mar - 15 Mar	China Eastern
01 Mar - 14 Mar	Ryanair
17 Mar - 01 Apr	Lufthansa
01 Mar - 01 Apr	Air China
19 Mar - 08 Apr	Air China
19 Mar - 02 Apr	Air China
14 Mar - 04 Apr	Air China
17 Mar - 13 Apr	Ryanair
22 Mar - 03 Apr	Ryanair
13 Mar - 02 Apr	Lufthansa
13 Mar - 06 Apr	Wizz Air Malta
19 Mar - 06 Apr	Air China

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 $437

Return flights