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

Return flights

23 Sep - 03 Oct	KLM
30 Sep - 04 Oct	KLM
18 Sep - 23 Sep	KLM
22 Sep - 25 Sep	KLM
27 Sep - 05 Oct	British Airways
25 Sep - 04 Oct	KLM
18 Sep - 24 Sep	KLM
28 Sep - 07 Oct	British Airways	direct
29 Sep - 05 Oct	British Airways
27 Sep - 01 Oct	British Airways	direct
28 Sep - 08 Oct	British Airways	direct
29 Sep - 01 Oct	British Airways	direct
27 Sep - 07 Oct	British Airways	direct
20 Sep - 24 Sep	KLM
21 Sep - 25 Sep	British Airways	direct
16 Sep - 18 Sep	KLM
25 Sep - 29 Sep	KLM
10 Sep - 11 Sep	KLM
21 Sep - 24 Sep	British Airways	direct
16 Sep - 19 Sep	KLM

Also check the deals for one-way flights from London to Nice 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 Nice in September from 148€

Return flights