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

Return flights

04 Sep - 15 Sep	Ryanair
15 Sep - 29 Sep	Ryanair
22 Sep - 02 Oct	Ryanair
22 Sep - 05 Oct	Ryanair
12 Sep - 28 Sep	Ryanair
24 Sep - 10 Oct	Ryanair
05 Sep - 17 Oct	Turkish Airlines
09 Sep - 28 Sep	Ryanair
24 Sep - 05 Oct	Ryanair
14 Sep - 28 Sep	Ryanair
04 Sep - 13 Sep	Ryanair
12 Sep - 03 Oct	Ryanair
09 Sep - 22 Sep	Ryanair
16 Sep - 15 Oct	Ryanair
16 Sep - 16 Oct	Ryanair
01 Sep - 14 Sep	Ryanair
11 Sep - 30 Sep	Ryanair
10 Sep - 28 Sep	Ryanair
22 Sep - 13 Oct	Ryanair
08 Sep - 06 Oct	Ryanair

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

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from London to Seoul in September from $758

Return flights