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

Return flights

11 Sep - 15 Sep	airBaltic
25 Sep - 30 Sep	airBaltic
29 Sep - 06 Oct	Scandinavian Airlines
04 Sep - 05 Sep	Scandinavian Airlines
29 Sep - 03 Oct	airBaltic
10 Sep - 14 Sep	Scandinavian Airlines
03 Sep - 04 Sep	airBaltic
18 Sep - 21 Sep	Scandinavian Airlines
13 Sep - 14 Sep	Scandinavian Airlines
04 Sep - 07 Sep	Scandinavian Airlines
06 Sep - 07 Sep	Finnair	direct
13 Sep - 14 Sep	Finnair	direct

Also check the deals for one-way flights from Billund to Helsinki 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.

Book a cheap hotel in Helsinki

Cheap car rent in Helsinki

Cheapest return flights from Billund to Helsinki in September from 122€

Return flights