I don't know if this is off-topic or not, but I don't know where else to ask this other than aviation.
I'm just wondering if airlines had to pay for the check-in areas they operate with. It's a big space and it's owned by the airport, so I assume they do but I'm not sure. If a check-in agent, airline manager, airport employee or anyone else who knows the answer to this question also give me around how much it would cost that would be great.