AirHint found the following cheapest return flights from London (LHR) to Billund (BLL) in September 2025 (see full year).

Return flights

27 Sep - 04 Oct	British Airways	direct
27 Sep - 05 Oct	British Airways	direct
27 Sep - 28 Sep	KLM
27 Sep - 28 Sep	British Airways	direct
27 Sep - 29 Sep	KLM
26 Sep - 28 Sep	KLM
25 Sep - 28 Sep	British Airways	direct
25 Sep - 02 Oct	British Airways
24 Sep - 28 Sep	British Airways	direct
26 Sep - 04 Oct	KLM
26 Sep - 29 Sep	KLM
29 Sep - 03 Oct	Air France
24 Sep - 27 Sep	British Airways	direct
23 Sep - 29 Sep	Air France
30 Sep - 02 Oct	KLM
26 Sep - 03 Oct	KLM
22 Sep - 23 Sep	Air France
30 Sep - 01 Oct	Lufthansa
25 Sep - 02 Oct	British Airways	direct
30 Sep - 01 Oct	British Airways	direct

Also check the deals for one-way flights from London to Billund 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 Billund in September from 152€

Return flights