Do you have a source for that outside of the CDC?
The plane seats may be no problem but what about the plane’s bathrooms? Who knows what is retained on those surfaces....
The statistics of Ebola in Africa (8,000 infected to date) are pretty conclusive. A virus of common cold infects nearly everyone in a large city. Ebola hasn't done that - neither in Africa, nor in Europe, nor in the USA. These numbers are not produced by the CDC; and those are the worst case (in a city) due to poor awareness, widespread superstition, and not so great infrastructure.
Still Ebola is not winding down yet. So it is dangerous and contagious. However every one infected person infects not 100 people, like common cold can easily do, and not even 10 people - but on average somewhere between 0 and 2, depending on personal protection that is used. This affects the rate of spreading. The nurses got infected because they worked with Mr. Duncan up to the moment of his death, which is the most dangerous. Nobody else seems to be infected - neither the power washer crew, nor the Sheriff's deputy, nor the family of Mr. Duncan (as far as we know.) There are pretty good chances to keep this under control.