From Billings and Seattle it is 819 mi (about 11 hours 37 mins).
That depends on how fast you drive and what route you take.
It is 172.88 miles. it takes 3 hours to drive from Portland OR to Seattle. :)
Using GoogleMaps as my guide, by driving there it appears to be right at 589 mi - about 8 hours 36 mins.
4 days
It takes about 11 to 12 hours to get to Reno from Seattle.
2days
13 Hours
9 hours
Around 48 hours nonstop.
Approximately 19 hours.
About 40-45 hours with out stops.
3 hours