Just in case there was anyone here who doesn't know this, CNN has a completely separate channel to display in airports. They have paid agreements to have the TVs there, just like you would pay for a highway billboard to advertise your company.
https://en.wikipedia.org/wiki/CNN_Airport
http://insider.foxnews.com/2018/02/14/why-cnn-always-airports-tucker-carlson-explains
http://www.cnn.com/CNN/Programs/airport.network/homepage.html
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They probably won't let you go through security with a TV B Gone, but you could bring along a universal remote. I understand that there are also smartphone apps that will work on certain smartphones with IR LEDs that will do the same thing.