Interesting indeed - I recently read the Economic Naturalist which briefly explained the reasons behind the price for last minute tickets (for the curious ones, http://goo.gl/oE1UK) I live in Europe and can definitely say that people do tend to buy their plane tickets a VERY long time in advance (a plane ticket from London to Athens can easily cost 10 EUR if bought well in advance).

Bus/train tickets tend to be pretty much the same anyway, whether u buy them in advance or a day before...

An important devil's advocate point: what about business travel? If business travel isn't included, there's a pretty big chunk of travel spend missing in this data. And it would certainly skew the advance booking metric.

However, I could see mozio fitting well in a corporate booking tool.

Interesting. I feel like the difference is that trips which require air transportation are planned in advance, so people start thinking about them long before they plan a trip down the street via lyft, sidecar, uber, or the like.

Always felt, that i am not the only one, who tries to avoid the last minute booking. But i do not know why. I thought first its money related, but for me it is not. And the more i think about, the more irrational it becomes. :-)