I assume you want to go somewhere near Spokane.
So if you "have" to get there, you'll need to be instrument rated, and have an airplane at least as capable as a Cirrus SR22, or maybe a C-182 Turbo. Even then, flight into icing conditions (which we get a lot of up here) isn't a go until you have a lot more airplane. We're talking about a lot of money here. And it still will take 4-5 hours of flying time.
Economically it's a no go. However, if you've cash to spare and a bit of flexibility it's do-able.
Graham, in E. Washington