Who's That?

It's quiz time here at the ole blog. Airlines spend lots of money painting their aircraft, and some reportedly also spend a good bit on consultants for logo design and such. So let's see how well it's paying off for them. I'll show you the tail, and you guess who it is. Answers tomorrow (if I remember). No fair looking up the registrations!

Since it's early in the week, I'll start you off with some easy ones: