So, I think I discovered approx poke miles for some wonder trades I was doing. My home base is USA. Here's what I've done so far.

4033 -Start-
4054 Germany
4160 Japan
4261 Japan
4362 Japan
4377 USA
4390 USA
4427 USA
4441 USA
4542 Brasil
4562 USA
4582 USA
--Finish--

Idea: You get approx 100 poke miles for trading out of your country. You get 1 poke mile for "passerby." You get approx 20 poke miles for trading in your home country. Anyone else try anything out? Or have other results?