AirHint found the following cheapest one-way flights from Seoul (ICN) to London (LHR) in July 2025 (see full year).

One-Way flights

28 Jul	VietJet Air
31 Jul	VietJet Air
30 Jul	SWISS
27 Jul	China Eastern
29 Jul	AirAsia X
30 Jul	Korean Air	direct
29 Jul	Korean Air	direct
28 Jul	Korean Air	direct
27 Jul	Korean Air	direct
31 Jul	Korean Air	direct

Also check the deals for return 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 one-way flights from Seoul to London in July from 368€

One-Way flights