Arriving from Landvetter Airport, Gothenburg, you must first take the airport bus to the Gothenburg Nils Ericson terminal (unless you go by car) . From there you can easily take the train to Trollhättan and Vänersborg that departs daily, several times throughout the day.
Airport to Gothenburg Central
From the Airport you take the shuttle busses to Gothenburg central station (Nils Eriksson Terminalen). The busses leaves every 12th minute and tickets can be bought on line in link below or at ticket terminals at the airport. On-line price: 95 SEK/ticket for a single ticket or 185 SEK for a round trip. Full price: single, 105 SEK/ticket, roundtrip 195 SEK/ticket.
Gothenburg Central to Trollhättan Central
Option 1 – Regular trains
From Gothenburg Central station you can go by regular trains up to Trollhättan. Time tables for both commuter trains and regular trains can be found at below address. Tickets can be bought on line or at the desks at Gothenburg Central (prices from 55 SEK and up).
Option 2 – Commuter trains
From Gothenburg Central station you can go by commuter trains up to Trollhättan. Time tables for commuter trains in link below. Tickets can be bought at Västtrafik Ticket office or via the Västtrafik ToGo app for Andorid or iPhone. Price 121 SEK/ticket Gothenburg-Trollhättan.