I don't know why I never saw this before but this is actually a really cool question.

I like the Frozone idea that Chakra mentioned, where certain pokemon can manipulate the water to create pathways for themselves through the air. That'd be really cool for like a more magic based society, where the water types practice and hone their skills to be able to do this. There's a lot of potential to this.

Personally, I think a Zootopia approach would be fun as well. Have like water steps or salmon cannons placed around the town that allow the water types to be whisked wherever they need to go. You'd probably see it more prevalent in like bigger cities but smaller villages might have accommodations as well.