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

Return flights

01 Aug - 08 Aug	China Eastern
03 Aug - 17 Aug	China Eastern
26 Aug - 31 Aug	Air China
18 Aug - 27 Aug	Air China
19 Aug - 29 Aug	Air China
18 Aug - 30 Aug	Air China
23 Aug - 30 Aug	Air China
18 Aug - 02 Sep	Air China
21 Aug - 25 Aug	Air China
18 Aug - 23 Aug	Air China
17 Aug - 24 Aug	Air China
26 Aug - 05 Sep	Air China
26 Aug - 07 Sep	Air China
26 Aug - 09 Sep	Air China
23 Aug - 03 Sep	Air China
25 Aug - 05 Sep	Air China
28 Aug - 04 Sep	Air China
22 Aug - 03 Sep	Air China
30 Aug - 14 Sep	Air China
30 Aug - 09 Sep	Air China

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Seoul to London in August from $821

Return flights