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

Return flights

30 Jul - 03 Aug	China Eastern
31 Jul - 20 Aug	Air China
21 Jul - 21 Aug	Air China
21 Jul - 20 Aug	Air China
26 Jul - 18 Aug	China Eastern
28 Jul - 13 Aug	Air China
30 Jul - 05 Aug	Air China
28 Jul - 04 Aug	Air China
30 Jul - 04 Aug	Air China
31 Jul - 05 Aug	Air China
28 Jul - 31 Jul	Air China
23 Jul - 30 Jul	Air China
23 Jul - 29 Jul	Air China
23 Jul - 25 Jul	Air China
23 Jul - 26 Jul	Air China
27 Jul - 29 Jul	Air China
26 Jul - 27 Jul	Japan Airlines
27 Jul - 30 Jul	Air China
24 Jul - 28 Jul	Japan Airlines
22 Jul - 25 Jul	Japan Airlines

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 736€

Return flights