The fastest way for most people to get Kubuntu is by downloading the CD Installer. The CD Installer is nearly 700MB. If you don't have a fast internet connection you may want to consider requesting a CD.

Once downloaded follow the instructions on How to burn a CD.

Bittorrents

You can download CDs and DVDs through bittorrent.

Wubi Windows Install

Wubi is an officially supported installer for Windows users that can bring you to the Kubuntu world with a single click. Wubi allows you to install and uninstall Kubuntu as any other Windows application, in a simple and safe way. Are you curious about Linux and Kubuntu? Trying them out has never been easier!

Try Wubi Now.

Feel free to view the complete list of download locations and other download options. This list is sorted by continent and country and is updated frequently so that it only includes mirrors that have the most recent files. Note, the list is quite long.

MD5 sums

Check these match your download
76e5a5d4b704677744bd84e042c05b63 kubuntu-9.10-alternate-amd64.iso
33fce2476d982977216faa40cbc334c5 kubuntu-9.10-alternate-i386.iso
5a996e0d794e35509d0275d411a3e737 kubuntu-9.10-desktop-amd64.iso
18ecb71bff567ce7a91443720a86473e kubuntu-9.10-desktop-i386.iso
36b1f68a396f3b4e4b5cc0849877ff35 kubuntu-9.10-netbook-i386.iso