A quick Wiki suggests that including radiative forcing, the number may be as high as 5%. And given the lack of viable alternative fuels, and the growth of the i

A quick Wiki suggests that including radiative forcing, the number may be as high as 5%. And given the lack of viable alternative fuels, and the growth of the industry, and potential reduction in other areas, that number may grow to 10, 15 or 25% by 2050, depending on who you listen to. For individuals who fly, the carbon emissions due to flying makes a non-trivial contribution to their personal carbon budget. As earth becomes more middle class and everybody starts flying, that will become a non-negligible problem.