Sure, they don't represent much compared to all flights people take just to go on vacation though...
Heck, your emissions are lower by driving to your destination with four passengers in a full sized truck or SUV than they are by having the same four passengers take a plane.
Consider the time wasted at the airport and if you're traveling a distance that can be covered by car in a day you're better off driving alone in a small car to get there.
Airplane manufacturers invest in anti emissions tech only to look good to authorities, none of it gets implemented in the end, might as well drive a car from the 80s on which the converter has never been changed, you'll probably pollute less for the same distance travelled!