Board Thread:Episode Discussion/@comment-14138255-20160225225013/@comment-14909251-20160304232650

SketchyOpus wrote: But there's also no indication that transport would be financially out of their reach. With air transport so common, if feels to me that a boat ride seems fairly insignificant, and not all that expensive.

(That said, if it is quite common, there's also the possibility they just ask to ride along with someone.)

We have seen nothing with regards to inter-Kingdom transport that wasn't industrial or military. Presumably travel between Patch and Vale was simple and cheap enough for Ruby, but that is nothing compared to traveling between continents. Given the state of things at the end of Volume 3, we can't be certain that inter-Kingdom travel won't also be more difficult and thus more expensive.