My daughter is home on leave. When I take her back to the airport how far can I go with her? I’m just wondering if I have to leave her where we check in or if I can go to the gate with her and wait for her plane to board?

You can ask the airline for a gate pass, and you will be able to go through TSA. Some airlines dont give out gate passes.

only passengers beyond security

Must have a ticket to go to the gate. You can go as far as the security check point.

I’m not sure how far that is. I’m sorry I know nothing about airports. So when I took her last time she checked in and then she had to go down these stairs. Am I allowed further than the stairs?

You can only go as far as TSA security check in