An intercontinental round trip is in the range of 10-15k miles, right? That's a plausible mileage for 6 months of driving, sure. Would match up with my understanding that fuel use for planes per passenger-mile is about the same as for cars with just a driver.
The big difference, of course, it that it takes a lot less time to travel that many miles in a plane. But on a per-passenger-mile basis they're no worse than non-carpooling cars. Admittedly a low bar.
The big difference, of course, it that it takes a lot less time to travel that many miles in a plane. But on a per-passenger-mile basis they're no worse than non-carpooling cars. Admittedly a low bar.