AirHint found the following cheapest return flights from London (LCY) to Stockholm (ARN) in September 2025 (see full year).

Return flights

26 Sep - 29 Sep	KLM
25 Sep - 29 Sep	KLM
26 Sep - 03 Oct	KLM
25 Sep - 05 Oct	KLM
23 Sep - 06 Oct	KLM
25 Sep - 02 Oct	KLM
20 Sep - 29 Sep	KLM
20 Sep - 23 Sep	KLM
20 Sep - 22 Sep	KLM
23 Sep - 03 Oct	KLM
23 Sep - 26 Sep	KLM
26 Sep - 30 Sep	KLM
26 Sep - 28 Sep	KLM
25 Sep - 07 Oct	KLM
26 Sep - 07 Oct	KLM
23 Sep - 07 Oct	KLM
28 Sep - 02 Oct	KLM
25 Sep - 30 Sep	KLM
20 Sep - 24 Sep	KLM
25 Sep - 01 Oct	KLM

Also check the deals for one-way flights from London to Stockholm 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.

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Cheapest return flights from London to Stockholm in September from $237

Return flights