AirHint found the following cheapest return flights from Seoul (ICN) to London (LHR) in July 2026 (see full year).

Return flights

27 Jul - 10 Aug	Finnair
29 Jul - 10 Aug	Finnair
01 Jul - 07 Jul	Finnair
08 Jul - 14 Jul	Finnair
06 Jul - 14 Jul	Finnair
20 Jul - 03 Aug	Air China
04 Jul - 18 Jul	Air China
07 Jul - 14 Jul	Finnair
01 Jul - 14 Jul	Finnair
03 Jul - 18 Jul	Air China
06 Jul - 18 Jul	Air China
01 Jul - 04 Jul	Air China
13 Jul - 20 Jul	Air China
14 Jul - 11 Aug	Finnair
28 Jul - 20 Aug	Malaysia Airlines
22 Jul - 02 Aug	Etihad Airways
01 Jul - 20 Aug	Vietnam Airlines
27 Jul - 12 Aug	Finnair
08 Jul - 11 Aug	Etihad Airways
09 Jul - 13 Aug	Lufthansa

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 $804

Return flights