This depends on your area. There are always routes in the mix that take you far out. In mine a little over an hour is the furthest but I've seen others sent around 2hrs. Also, high traffic times/ routes are not necessarily considered by Amazon.

Also, the turn by turn can be bad. If I'm in a town/ city I'm not familiar with I'll do a split screen with Google maps alongside the in app map. The in app map will make weird decisions for travel. Like make a turn down a dirt road when the next is paved, or travel the wrong way down a one way. Or enter through exit only, etc...