What is the approximate cost of the trip, about 100 euros? Is there no bus or train there, or did you fly in at night? I have never been to Norway, but when I need an airport transfer, I book it on gettransfer. You can check their website https://gettransfer.com/en/services/airport_transfer to see how much a hotel to airport transfer will cost in Norway, I think they work there too. I saw that you can share your trip there, when you book a trip, you need to click “I want to share my trip”, but I haven’t used this option yet. Will you write later if you managed to save money?