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

Return flights

24 Jul - 03 Aug	British Airways
15 Jul - 22 Jul	KLM
27 Jul - 05 Aug	KLM
17 Jul - 03 Aug	British Airways
29 Jul - 03 Aug	Lufthansa
28 Jul - 03 Aug	KLM
23 Jul - 29 Jul	KLM
21 Jul - 03 Aug	KLM
21 Jul - 29 Jul	KLM
17 Jul - 31 Jul	British Airways
28 Jul - 04 Aug	KLM
23 Jul - 01 Aug	KLM
23 Jul - 30 Jul	KLM
23 Jul - 03 Aug	KLM
14 Jul - 30 Jul	Lufthansa
15 Jul - 29 Jul	KLM
20 Jul - 05 Aug	KLM
18 Jul - 30 Jul	Lufthansa
14 Jul - 18 Jul	Lufthansa
22 Jul - 29 Jul	KLM

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 $1039

Return flights