Airports are often stressful at the best of times especially for people with disabilities. Airports are now recognising hidden disabilities and are putting stuff in place to make your experience easier.
From what an airport offers varies from airport to airport. But they all do a special lanyard If you are wearing the lanyard, staff should recognise it and understand that you have a hidden disability and that you may need a little extra help or time. However, they will not know what your particular disability is, or what challenges and issues you may face. If you have specific requirements, please ask a member of staff for help.
Here is a list and the links of airports and what they do to help.
(There are a lot more airports that do this)