Cheaper? Not sure about that. I've done a couple 3000+ mile drives and the price was pretty comparable to a flight (in terms of fuel). If you have more than one person in the car, it's cheaper than flying.
And these are electric cars we are talking about. I would imagine they would beat the cost of flying every time.
but you must not forget, time is money.
Of course. And don't forget you need a place to stay and food to eat on the way as well. I was just referring to the cost of transportation.
How would it be cheaper if the refueling stations are free?
Hotels, food, etc. If the goal is the destination rather than the journey, I imagine airlines will be the most efficient form of long distance travel for the forseeable future.