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

Return flights

20 Jul - 24 Jul	British Airways
19 Jul - 23 Jul	British Airways
19 Jul - 24 Jul	British Airways
08 Jul - 17 Jul	Air China
08 Jul - 22 Jul	Air China
13 Jul - 17 Jul	British Airways
31 Jul - 15 Aug	British Airways
13 Jul - 20 Jul	Austrian Airlines
14 Jul - 24 Jul	British Airways
11 Jul - 18 Jul	Air China
31 Jul - 12 Aug	British Airways
30 Jul - 16 Aug	British Airways
31 Jul - 16 Aug	British Airways
20 Jul - 11 Aug	British Airways
19 Jul - 11 Aug	British Airways
22 Jul - 31 Jul	British Airways
29 Jul - 24 Aug	British Airways
23 Jul - 07 Aug	Air China
08 Jul - 05 Aug	Air China
24 Jul - 04 Aug	Air China

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

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 London to Seoul in July from $1140

Return flights