Why planes aren't electric. Yet.

Another problem people might not think about when talking about electric airplanes is currently you cant make an electric jet engine. The only current feesable option is propeller. Which is less efficient and slower than a jet engine. Which means it’s better suited for short flight. If you add that to what people are in the comments about replacing short flights with highspeed trains you’d have the full picture of the obstacles facing electric aircrafts. 

Side note: there are electric jet engines that are being tested for interplanetary missions but they have a lot of drawbacks and are not suited for an in atmosphere flight. Their electricity consumption is high and their thrust is extremely low which is not a problem in space. This technology might, and I think will, be used for aircraft in the far future.