These drawings done over the years are all done from observation in various airports. They take anywhere from 1 minute to 10 minutes.
Denver to Albuquerque
2008
Black ink on paper
11" x 8.5"
My first flight into Denver had been delayed, so I sprinted across the terminals to make my flight. I was so out of shape (still am) but I remember just being relieved to be on this plane!