Has anyone had any experience flying with their Rad Bikes? I'm going from Michigan to Phoenix for a month and would love to take our bikes with (Rad Mini 4 & Rad Mini Step-Thru).

Shipping the 2 bikes there & back is going to cost $650, so I need an airline that can take them.

I know won't be able to transport the batteries. Those will have to ship separately.

Should I bring them folded up in a box? Is there a better way to transport them?

Thanks for your help!