The suggested route is basically dependant on your time and preferences. Naturally the route and its timing is highly dependant on the flow, water level, traffic, actual bans by the relevant authorities. Naturally speed downstream and upstream differs. Example routes are listed at the boat’s page.
A trip to Szentendre is usually 4 hours, 2.5 hours to Szentendre and 1.5 hour to return to Budapest.
A 2-hour trip usually enough for an extended Budapest, so something like Dock 42 – Haller u. – Dock 42.
A 1-hour trip covers short version of Budapest Dock 42 – Vigado – Dock 42.

