distance to travel useless info in Discovery V8

[lds]

Hi All,Some use less info.
My son lives in Houston TX and drives a discovey V8.
He has just arrived in Butte Montanna.This state borders on the Canadian border.
This is the useless knowledge
Houston to Butte is 2881 kls,
Adelaide to Cairns is 2885 kls(.By Google)
Regards
Ray