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

Return flights

18 Jul - 31 Jul	Air China
18 Jul - 29 Jul	Air China
23 Jul - 31 Jul	Air China
21 Jul - 29 Jul	Air China
18 Jul - 16 Aug	Air China
18 Jul - 05 Aug	Air China
23 Jul - 12 Aug	Air China
18 Jul - 02 Aug	Air China
23 Jul - 29 Jul	Air China
21 Jul - 31 Jul	Air China
24 Jul - 07 Aug	Air China
15 Jul - 29 Jul	Air China
17 Jul - 29 Jul	Air China
14 Jul - 31 Jul	Air China
10 Jul - 31 Jul	Air China
22 Jul - 19 Aug	Air China
16 Jul - 05 Aug	Air China
21 Jul - 03 Aug	Air China
24 Jul - 05 Aug	Air China
17 Jul - 05 Aug	Air China

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 $690

Return flights