This was literally a five-minute exercise with google queries and Calca, so I won't be surprised if you're right. For this trip I used 991 air miles, vs 1177 dr

This was literally a five-minute exercise with google queries and Calca, so I won't be surprised if you're right. For this trip I used 991 air miles, vs 1177 driving miles. Co2PerMile = 53 (for a plane) AirTravelMiles = 991 PeopleOnAirplane = 189 (average passengers per plane) AirTravelCo2PerPerson = Co2PerMile * AirTravelMiles / PeopleOnAirplane => 277.8995 VehicleGramsPerMile = 411 (average gas car) DriveMiles = 1177 GramsPerPound = 453.592 Co2PoundsTrip = VehicleGramsPerMile * DriveMiles / GramsPerPound => 1066.4804 1066 is roughly 4x 277. Or, very roughly, a plane is about 50 lbs/mile, and a car is 1 lb/mile, so it depends on number of passengers in each. As for an electric car, they say an electric car is currently equivalent in emissions to an 80 mpg car, and the average gas car is 22mpg, so... about 4x. So again very roughly, for that distance, air travel is better than car travel (in terms of CO2) unless you have a 4-person carpool for gas cars. If it's a one-person electric car, it's roughly equivalent. Anyway still, the takeaway is that it's the travel distance that has the CO2 impact. Car vs Plane isn't really the point. (Lemme know if you see a 10x error.)