Save "favorite" or "common" journeys
I'm guessing a lot of people will travel the same journey often, for example to go to work or relatives. It would be nice to be able to mark these journeys as "favorite" so you can easily select them from a list and only have to choose the departure/arrival time rather than having to enter the "from" and "to" location every time.
Maybe even give an option to use such a journey in reverse (e.g. coming back from work).