Despite the fact that Trondheim (Other Writing Trondheim) is a fairly popular tourist destination among Russian tourists, there is no direct communication between Moscow and the Trondheim. However, there are flights of SAS airlines with a transfer to Oslo. But in this case, much depends on the luck. Or rather, how much you have to wait for a docking flight. Sometimes it happens 1-2 hours and then you can wait. In my case, it was 8 hours and I decided not to wipe my pants at the Gardermuen airport and went to the ultimate goal on the bus.
To get from the airport to the central bus station, I used the high-speed train FlytoGet (analogue of Moscow AeroExpress) and after 20 minutes I was already at the Central Railway Station of the Norwegian Capital, which was hand to the central bus station. The ticket cost about 22-24 euros, translated from the Norwegian crowns. There is also a more fiscal option, this is a regular train, but the difference in the price was not so significant, so I decided not to save.
By the way, from Oslo it was possible to get to Trondheim and on the train, but for some reason (I do not remember), I neglected this option. Whether it was more expensive, whether it was not very convenient for time.
From the central bus station Busstererminalen in Trondheim, several buses are sent daily, and more from different transport companies. But at the time of my arrival, the most closest in time were Nor-Way Bussekspress and Lavprisekspressn buses. After some clarification chose a second company, because even despite the fact that the flight went later, the price of the ticket was one and a half times cheaper. With that, why so, for me it remains a mystery, because the buses outwardly did not differ from each other at all.
Lavprisekspressen's bus ticket costs about 16 euros, while the Nor-Way Bussekspress bus was about 27 euros.
Time on the way from Oslo to Trondheim was approximately 8 and a half hours, most of whom I have slept successfully.
In the same Trondheim, the easiest way to move either by bus or on foot. Taxis in the city there is a lot, however, the prices seemed to me extremely overestimated.