I am choosing transportation from an hotel near Amsterdam's Central Station to Keukenhof. The website mentions Arriva Bus from Schiphol Plaza to Keukenhof and from Central Amsterdam to Keukenhof, but nowhere does it state where in Central Amsterdam to catch the bus, Does anyone know this information or where I can find it?
From the Googling I've done, it appears that you take the 197 bus operated by Connexxion, one of its stops being the Rijksmuseum, and transfer to the Arriva bus 858 at the airport, to get to Keukenhof.
I checked and Connexxion 197 doesn't run from Amsterdam Centraal Station. If you're staying around there, it's much easier (and quicker) to take the train to Schiphol and pick up the Keukenhof Express there.
I few years ago I picked it up outside The American Hotel; when I was near there last November, I noticed the 197 still stopped there.
Travel by train to Schiphol instead of bus. The combi ticket includes bus to/from Schiphol from/to the flower park, but not to Amsterdam Centraal. There used to be buses departing from Amsterdam (city) to Keukenhof but they were discontinued couple years ago.