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

Return flights

24 Sep - 28 Sep	Scandinavian Airlines
24 Sep - 29 Sep	Scandinavian Airlines
02 Sep - 04 Sep	Scandinavian Airlines
19 Sep - 21 Sep	Scandinavian Airlines
11 Sep - 15 Sep	Scandinavian Airlines
11 Sep - 13 Sep	Scandinavian Airlines
26 Sep - 28 Sep	Scandinavian Airlines
15 Sep - 19 Sep	Scandinavian Airlines
04 Sep - 07 Sep	Scandinavian Airlines
03 Sep - 07 Sep	Scandinavian Airlines

Also check the deals for one-way flights from Billund to London 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 Billund to London in September from $212

Return flights