Rockin' At 30,000

 It's interesting to see the evolution of Inflight Entertainment Systems on aircraft. Many airlines offer WiFi and expect you to supply your own entertainment via your phone or laptop. To do this, there should be an electrical outlet at your seat although many airlines, especially the cheap ones, don't have any such thing. My favorite airline is Delta which offers an IFE unit on nearly every mainline aircraft except the soon to be jettisoned Boeing 717. Otherwise, be sure to bring some earplugs or headphones because there's going to be a video unit in front of you. United has ordered many new planes and they will all come with IFE units. Some current planes have them, many do not. American is sadly going in the opposite direction, pulling them out of planes that have existing systems and not ordering them for new aircraft. They expect you to supply your own entertainment. (This does not apply to planes flying to Europe or Asia which pretty much all have entertainment systems regardless of the airline.) The days of music only on airplanes and perhaps a movie on an overhead screen are long gone. When you encounter a modern IFE system, you'll find hundreds of films and television shows along with dozens of music channels.