Please be aware that my question stems from a basic lack of knowledge of airports.
First of all: I'm moving to Berlin from Austin, and I'm doing so with my cat in cabin. The flights will be Austin-Washington, Washington-Frankfurt, Frankfurt-Berlin. The first flights are operated by United and then Frankfurt-Berlin is by Lufthansa. For the record Washington-Frankfurt and Frankfurt-Berlin all happen in the A/Z hallway of the Frankfurt airport in the below map.
I've already paid for my cat in cabin with United. But with Lufthansa you need to pay at the airport. My question is where? The lady at customer service wasn't very helpful.
I've been told I pay at check in. My confusion is how do I get there without exiting the airport? I know this sounds dumb but I'm used to American airports where you park outside then come in to check in then go into security then to where all the gates are. When I arrive at Frankfurt aren't I where all the gates are? Don't I just walk from a gate with A to a gate with Z?
I guess the solution to this is that when I arrive from Frankfurt from an international flight, I go through immigration then this dumps me out at the terminal entrance where I check in, then go into security then go to the gate for Frankfurt-Berlin. But this doesn't make any sense according to the map because through which way am I being dumped at the terminal entrance if Washington-Berlin and Frankfurt-Berlin occur in A/Z.
Feel free to answer whatever section of this post. I think the best way for you to answer is to just tell me how this will all happen as in "you arrive then go from here to here then there blah blah" and I'd appreciate it if you refer to the map below, if possible.
A quick subquestion to all this: Do I need to walk into the "I have something to declare" lane if I have a cat with me?