Billund Airport lies in the high northern latitudes at 55.74° N, 9.16° E, on Europe/Copenhagen time (UTC+2). At this latitude winter brings long nights, de-icing and snow clearance, and the great-circle routes that pass overhead run closer to the pole than a flat map suggests.
Billund Airport has 1 runway. The longest, 09/27, measures 10,172 ft by 148 ft, which puts the field in the long-haul capable category: widebodies operate comfortably, though the very longest sectors may need a payload trade. The surface is asphalt. It is lit for night operations.
Runway 09/27 is aligned roughly east/west, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. Every runway here shares that east/west alignment, so a strong crosswind means a crosswind landing rather than a switch to another strip.