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

Return flights

30 Sep - 07 Oct	SWISS
26 Sep - 10 Oct	SWISS
29 Sep - 07 Oct	SWISS
27 Sep - 04 Oct	KLM
23 Sep - 01 Oct	SWISS
29 Sep - 14 Oct	ITA Airways
27 Sep - 01 Oct	KLM
24 Sep - 30 Sep	Lufthansa
24 Sep - 01 Oct	Lufthansa
20 Sep - 24 Sep	KLM
22 Sep - 30 Sep	SWISS
23 Sep - 30 Sep	SWISS
20 Sep - 21 Sep	KLM
29 Sep - 06 Oct	ITA Airways
30 Sep - 05 Oct	KLM
26 Sep - 30 Sep	KLM
20 Sep - 22 Sep	KLM
23 Sep - 26 Sep	SWISS
27 Sep - 30 Sep	SWISS
23 Sep - 24 Sep	SWISS

Also check the deals for one-way flights from London to Valencia 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 Valencia in September from $285

Return flights