Flying

There are daily direct flights from Amsterdam and Copenhagen to Trondheim Airport Værnes, in addition to a number of other European cities. More at Avinor

There are also about 25 flights each day from Oslo to Trondheim.

Transport from airport to city centre

Train

The Dovre railway
The Røros railway

Boat

For those who want to combine the visit to Trondheim with some sightseeing, there is also the coastal steamer that travels along the Norwegian coast from Bergen to Trondheim and further north. Further information can be found at www.hurtigruten.com