How do I get from Keukenhof to Delft? I will be returning from Delft to Amsterdam. Approximately how long is each leg of trip? Thanks.
Take the Keukenhof Express bus to Leiden, where you can pick up the next train to Delft, which runs at least 4 times per hour. It is the same frequency the other way around to Amsterdam. Mind that Delft is an unmanned station: for getting your ticket from a machine you must have a working bank card. To be on the safe side you can buy them in Leiden, which has a ticket window.
For schedules use the public transport planner 9292.nl.
The so-called Combi-Ticket for the Keukenhof includes bus transport to Leiden.
Depends on the time of day, and which combination of bus/train. Look it up on the Netherlands train website.
ETA I see the PP beat me to it with a link.