Cheapest one-way BLL–OPO flights, September

AirHint found the following cheapest one-way flights from Billund (BLL) to Porto (OPO) in September 2026 (see full year).

One-Way flights

22 Sep Norwegian Air Sweden AOC
07 Sep Norwegian Air Sweden AOC
25 Sep Wizz Air
06 Sep KLM
07 Sep Norwegian Air Sweden AOC direct
11 Sep Norwegian Air Sweden AOC direct
18 Sep Norwegian Air Sweden AOC direct
25 Sep Norwegian Air Sweden AOC direct

Also check the deals for return flights from Billund to Porto in September.

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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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