Airline prices are lower (6 percent for the industry) than last year, but demand is strong and seats will fill quickly. Book your holiday air travel early this year to get the seat and times you want. That's the advice from Dean Headley, Airline Quality Rating (AQR) co-author and associate professor of marketing at Wichita State University. Go to http://www.wichita.edu/j/?4989 for video comments. Go to http://www.wichita.edu/j/?4993 for the complete story.