Without a ticket of your own to fly, you can not pass the security checkpoint into the secure area. If you want you can hire an escort for children. Cost on American Airlines is $150 additional and they will only assist them from the security gate to the plane and from the plane to the security gate exit. American Airlines does the best job with this, but it is from security gate to security gate. They will NOT get them to or from a cab, bus, limo, Uber, Lyft vehicle. Only to or from the security gate to or from the plane. After exiting from the secure security area on arrival the child is on their own.
No you will not be able to go past the security checkpoint without a ticket you have to be a passenger. However most Airlines have a special service where they help children get to and from when they fly by them themself. I think the cost is about $100.
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