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

Return flights

28 Jul - 14 Aug	China Southern
28 Jul - 18 Aug	China Southern
28 Jul - 11 Aug	China Southern
28 Jul - 08 Aug	China Southern
28 Jul - 15 Aug	China Southern
28 Jul - 07 Aug	China Southern
31 Jul - 18 Aug	Air France
30 Jul - 06 Aug	Air China
29 Jul - 13 Aug	Air China
30 Jul - 08 Aug	Air China
29 Jul - 30 Jul	Air China
31 Jul - 31 Jul	Qatar Airways
27 Jul - 31 Jul	Emirates

Also check the deals for one-way flights from Seoul to London 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 Seoul to London in July from 648€

Return flights