Transatlantic flights average 75 mpg per passenger, but can be up to almost 100 mpg per passenger:

https://en.wikipedia.org/wiki/Fuel_economy_in_aircraft

Jet fuel is 37.4 MJ/L; compare to gasoline at 34.2:

https://en.wikipedia.org/wiki/Energy_density#Energy_densitie...

An electric car will have up to 150 miles-per-gallon equivalent (aka 150 miles per the same amount of energy that's in one gallon of gasoline):

https://en.wikipedia.org/wiki/Miles_per_gallon_gasoline_equi...

So therefore, an electric car with just the driver is more efficient energy-wise than an airplane, while an average airplane is better than a gas car with even three people in it.