AirHint found the following cheapest return flights from London (LHR) to Seoul (GMP) in August 2025 (see full year).

Return flights

28 Aug - 31 Aug	Air China
25 Aug - 31 Aug	Air China
30 Aug - 04 Sep	China Southern
28 Aug - 04 Sep	China Southern
27 Aug - 31 Aug	Air China
21 Aug - 31 Aug	SWISS
20 Aug - 25 Aug	British Airways
31 Aug - 12 Sep	British Airways
20 Aug - 24 Aug	British Airways
20 Aug - 26 Aug	British Airways
20 Aug - 27 Aug	British Airways
24 Aug - 05 Sep	British Airways
28 Aug - 06 Sep	China Eastern
19 Aug - 23 Aug	British Airways
19 Aug - 25 Aug	British Airways
30 Aug - 09 Sep	Air China
30 Aug - 14 Sep	Air China
27 Aug - 09 Sep	Air China
29 Aug - 14 Sep	Air China
29 Aug - 08 Sep	Air China

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

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from London to Seoul in August from $906

Return flights