The only bike in my fold that can fit into a suitcase without disassembly is the Brompton. I use a 31" suitcase and though its slightly oversized, no problems with any airlines thus far. Now you know why the Brompton is still the reigning champion in terms of packability in my experience.



Notice how much spare space I have - enough to put your clothes in. It will weigh about about 19kg with just the Brompton and suitcase. I normally put my personal stuff in as well and though 22-24kg, most airlines just let it through