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

Return flights

05 Mar - 12 Mar	China Southern
03 Mar - 16 Mar	Air China
13 Mar - 15 Mar	Air China
02 Mar - 16 Mar	China Southern
08 Mar - 14 Mar	China Southern
09 Mar - 15 Mar	China Southern
08 Mar - 17 Mar	China Southern
12 Mar - 16 Mar	China Southern
05 Mar - 15 Mar	China Southern
13 Mar - 16 Mar	China Southern
29 Mar - 05 Apr	Air China
20 Mar - 18 Apr	Air China
27 Mar - 06 Apr	Air China
25 Mar - 08 Apr	Air China
27 Mar - 04 Apr	Air China
28 Mar - 16 Apr	Air China
27 Mar - 12 Apr	Air China
28 Mar - 04 Apr	Air China
23 Mar - 06 Apr	Air China
30 Mar - 08 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 $541

Return flights