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

Return flights

09 Sep - 15 Sep	SWISS
20 Sep - 24 Sep	KLM
09 Sep - 24 Sep	KLM
08 Sep - 12 Sep	SWISS
08 Sep - 15 Sep	SWISS
15 Sep - 22 Sep	SWISS
15 Sep - 24 Sep	KLM
03 Sep - 10 Sep	KLM
01 Sep - 10 Sep	KLM
16 Sep - 25 Sep	KLM
26 Sep - 01 Oct	Lufthansa
27 Sep - 03 Oct	KLM
20 Sep - 01 Oct	KLM
21 Sep - 01 Oct	KLM
21 Sep - 06 Oct	SWISS
27 Sep - 02 Oct	KLM
26 Sep - 04 Oct	KLM
27 Sep - 04 Oct	KLM
26 Sep - 03 Oct	SWISS
26 Sep - 12 Oct	Lufthansa

Also check the deals for one-way flights from London to Split 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 Split in September from $253

Return flights