Can I use a cheaper Torp Express Low-Cost ticket for a later bus than the one I booked?

I did it by asking the bus driver and he was super nice about it, didn’t seem to be a problem at all. Also, I was travelling with just a backpack and the bus was half empty. But I do think it should be fine unless it’s hella crowded, so it’s more that than the price that I think might be an issue.

if you can, then go to Gardemoen instead. If youre planning to go to Oslo. It isnt like 2 hours away and sometimes much cheaper. Much less of a hassle.