Cheapest return flights from London to Seoul in September from $640

Best time to book flights for London (LHR) to Seoul (ICN) flights at AirHint

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

Return flights

22 Sep - 13 Oct Air China
24 Sep - 18 Oct Air China
07 Sep - 21 Oct Air China
20 Sep - 12 Oct Air China
21 Sep - 12 Oct Air China
11 Sep - 11 Oct Air China
18 Sep - 28 Sep China Southern
25 Sep - 09 Oct Finnair
22 Sep - 28 Sep China Southern
19 Sep - 28 Sep China Southern
24 Sep - 19 Oct China Southern
03 Sep - 14 Sep Finnair
04 Sep - 15 Sep Finnair
03 Sep - 15 Sep Finnair
04 Sep - 16 Sep Finnair
07 Sep - 16 Sep Finnair
04 Sep - 14 Sep Finnair
22 Sep - 29 Sep China Southern
25 Sep - 14 Oct Finnair
28 Sep - 25 Oct Finnair

Also check the deals for one-way flights from London to Seoul in September.

Skyscanner

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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