Trollhättan-Vänersborg Airport has service to Stockholm (Bromma) airport with up to eight flights a day. The flight takes less than an hour. Upon arrival in Trollhättan it takes about 10 minutes to reach the town center by taxi.
There is a frequent, fast, and direct train service between Trollhättan and Gothenburg. The journey takes about 35 minutes. To Stockholm, with SJ3000, the journey takes about 3 hours. It is also easy to travel by train to Trollhättan from Karlstad, Oslo, Malmö, and Copenhagen. You can find timetables on Västtrafik and SJ.
One highway and three main roads connect in Trollhättan. The driving time between Trollhättan and Gothenburg is about 45 minutes, Uddevalla 15-20 minutes, and from Oslo about 3 hours.