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

Return flights

21 Aug - 23 Aug	Air China
08 Aug - 17 Aug	Air China
03 Aug - 12 Aug	Air China
10 Aug - 23 Aug	Air China
06 Aug - 14 Aug	Air China
08 Aug - 18 Aug	Air China
30 Aug - 06 Sep	Air China
12 Aug - 20 Aug	Japan Airlines
08 Aug - 16 Aug	Air China
08 Aug - 15 Aug	Air China
09 Aug - 16 Aug	Air China
17 Aug - 01 Sep	ANA
28 Aug - 17 Sep	ANA

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

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 August from 763€

Return flights