Maybe I'm just not using the right terms to search, or it hasn't been asked yet... but is there a map or way or knowing which path/route my package will take on its way to the final destination, before I ship it? I feel like this is general/common knowledge that I'm just missing. I've not had to ship much, and only once in colder weather, that was a shorter distance than I am needing to ship now. I know to check the temps in both the start and end destinations, but if I am sending an animal across the country, is there a greater likelihood that the box will be exposed to colder temperatures, or will it simply get onto a plane same as any other location, and arrive close enough to the destination that it shouldn't be an issue?

I have some time to figure this out, since it's all around too cold to ship, but would like to know for when it starts to warm up