Short flights are the worst, emitting more CO2 per mile traveled than medium to longer flights.
1.Consider travel alternatives Flying is the most carbon intensive mode of transport, and is often the largest contributor to a person’s individual carbon footprint. The average cross-country, round-trip flight emits about 4,500 pounds of carbon emissions. Short flights are the worst, emitting more CO2 per mile traveled than medium to longer flights. So, when possible, take a train or bus instead of flying. Just think of all the security and TSA headaches you’ll avoid!