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

Return flights

31 Aug - 11 Sep	Air China
31 Aug - 07 Sep	Air China
19 Aug - 25 Aug	Air China
25 Aug - 29 Aug	Air China
22 Aug - 29 Aug	Air China
19 Aug - 02 Sep	Air China
18 Aug - 25 Aug	Air China
23 Aug - 01 Sep	Air China
22 Aug - 30 Aug	Air China
28 Aug - 04 Sep	Air China
04 Aug - 10 Aug	EVA Air
04 Aug - 19 Aug	EVA Air
05 Aug - 12 Aug	EVA Air
10 Aug - 26 Aug	Air China
07 Aug - 15 Aug	Air China
13 Aug - 01 Sep	Air China
24 Aug - 02 Sep	Air China
24 Aug - 14 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 $860

Return flights