Helsingborg has no own major airport but shares one with the nearby city Ängelholm. But the Helsingborg/Ängelholm airport (AGH) is less than an out away and SAS (Scandinavian Airlines) fly to Stockholm several times a day. It takes about 45 minutes.
Othewise Copenhagen International Airport (CPH) and Malmoe Sturup (MMX) are in the region with many international flights.
There used to be a Helicopter line between Helsingborg And Copenhagen International Airport but it has recently closed.