The summary of the Air Carrier Access Act for Passengers with Disabilities spells out what airlines can and can’t do in regards to the travel of disabled passengers flying in the United States.
Updated in 2015, the summary lays out what constitutes discrimination, access requirements, and other services. It contains language around accompanying passengers, when people can and cannot be denied boarding, and training regulations. It also includes a link to another page where a traveler may file a complaint.
The site is maintained by the U.S. Department of Transportation.