Wait time reporting is a mess right now.

Some airports have wait time systems: http://www.atlanta-airport.com/Passenger/waittimes/

The TSA has a mobile ready site with wait times for some airports: https://apps.tsa.dhs.gov/mytsa/status_home.aspx

Some private companies are in the market. Not sure where the data comes from: http://www.whatsbusy.com/airport

I like Blip, who has an implemented an elegant solution in JFK: https://techcrunch.com/2015/08/24/this-technology-monitors-o...

The problem is that there is not all that much money in reporting wait times. Right now the wait times are impacting passenger's experience to the point that I think the airlines might foot the bill to cover a Blip like system and fold it into their apps.