I was looking into folding bikes a couple of years ago and found a company that also sold a kit to turn a standard Samsonite suitcase into a trailer for the bike. The folding bike fit into the Samsonite so you could check it onto a plane. Once you got to your destination you converted the suitcase into a trailer and hooked it to the bike an could ride away. I don't remember the company but a search would probably find it.
that is Green Gear/ Bike Friday, of Eugene Oregon.
Often discussed in the Folding bike forum right here.
http://www.bikeforums.net/forumdispl...-Folding-Bikes
suitcase has its own trolley wheels now, with pull up handle and 2 12" wheels
and a subframe to fit them on the side of the case, to tow the
suitcase as a trailer .. refilling it with the clothes you packed in a soft duffle.
2 pieces.. of cake ..
I purchased a Carry Freedom City, another 12" wheel trailer , though this one
the wheels stay on the frame, they fold flat within it, for transport.
And there is a soft duffle that slings in the frame like a Hammock,
that you put over your shoulder..
Pulling the trailer by its handle, you can run with it like a trotting sulky horse.
folding bike on top to beat feet down the platform, to catch the train..