According to CNN, the CNN Airport Network - a special package of news, sports and travel programming - is broadcast at 60 participating airports. Airports receive a fee from CNN to broadcast the channel.
Carlson said this setup made sense 20 years when CNN had a "centrist reputation," but now the network "has strayed so far to the left, constantly promoting wacky Russia-related conspiracy theories."
http://insider.foxnews.com/2018/02/14/why-cnn-always-airports-tucker-carlson-explains